Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (40 commits)
Input: ADP5589 - new driver for I2C Keypad Decoder and I/O Expander
Input: tsc2007 - add X, Y and Z fuzz factors to platform data
Input: tsc2007 - add poll_period parameter to platform data
Input: tsc2007 - add poll_delay parameter to platform data
Input: tsc2007 - add max_rt parameter to platform data
Input: tsc2007 - debounce pressure measurement
Input: ad714x - fix captouch wheel option algorithm
Input: ad714x - allow platform code to specify irqflags
Input: ad714x - fix threshold and completion interrupt masks
Input: ad714x - fix up input configuration
Input: elantech - remove support for proprietary X driver
Input: elantech - report multitouch with proper ABS_MT messages
Input: elantech - export pressure and width when supported
Input: elantech - describe further the protocol
Input: atmel_tsadcc - correct call to input_free_device
Input: add driver FSL MPR121 capacitive touch sensor
Input: remove useless synchronize_rcu() calls
Input: ads7846 - fix gpio_pendown configuration
Input: ads7846 - add possibility to use external vref on ads7846
Input: rotary-encoder - add support for half-period encoders
...

Documentation/input/elantech.txt

···
 Currently the Linux Elantech touchpad driver is aware of two different
 hardware versions unimaginatively called version 1 and version 2. Version 1
 is found in "older" laptops and uses 4 bytes per packet. Version 2 seems to
-be introduced with the EeePC and uses 6 bytes per packet.
+be introduced with the EeePC and uses 6 bytes per packet, and provides
+additional features such as position of two fingers, and width of the touch.
 
 The driver tries to support both hardware versions and should be compatible
 with the Xorg Synaptics touchpad driver and its graphical configuration
···
    can check these bits and reject any packet that appears corrupted. Using
    this knob you can bypass that check.
 
-   It is not known yet whether hardware version 2 provides the same parity
-   bits. Hence checking is disabled by default. Currently even turning it on
-   will do nothing.
-
+   Hardware version 2 does not provide the same parity bits. Only some basic
+   data consistency checking can be done. For now checking is disabled by
+   default. Currently even turning it on will do nothing.
 
 /////////////////////////////////////////////////////////////////////////////
 
+3. Differentiating hardware versions
+   =================================
 
-3. Hardware version 1
+To detect the hardware version, read the version number as param[0].param[1].param[2]
+
+ 4 bytes version: (after the arrow is the name given in the Dell-provided driver)
+ 02.00.22 => EF013
+ 02.06.00 => EF019
+In the wild, there appear to be more versions, such as 00.01.64, 01.00.21,
+02.00.00, 02.00.04, 02.00.06.
+
+ 6 bytes:
+ 02.00.30 => EF113
+ 02.08.00 => EF023
+ 02.08.XX => EF123
+ 02.0B.00 => EF215
+ 04.01.XX => Scroll_EF051
+ 04.02.XX => EF051
+In the wild, there appear to be more versions, such as 04.03.01, 04.04.11. There
+appears to be almost no difference, except for EF113, which does not report
+pressure/width and has different data consistency checks.
+
+Probably all the versions with param[0] <= 01 can be considered as
+4 bytes/firmware 1. The versions < 02.08.00, with the exception of 02.00.30, as
+4 bytes/firmware 2. Everything >= 02.08.00 can be considered as 6 bytes.
+
+/////////////////////////////////////////////////////////////////////////////
+
+4. Hardware version 1
    ==================
 
-3.1 Registers
+4.1 Registers
     ~~~~~~~~~
 
 By echoing a hexadecimal value to a register it contents can be altered.
···
          smart edge activation area width?
 
 
-3.2 Native relative mode 4 byte packet format
+4.2 Native relative mode 4 byte packet format
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 byte 0:
···
                        positive = down
 
 
-3.3 Native absolute mode 4 byte packet format
+4.3 Native absolute mode 4 byte packet format
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+EF013 and EF019 have a special behaviour (due to a bug in the firmware?), and
+when 1 finger is touching, the first 2 position reports must be discarded.
+This counting is reset whenever a different number of fingers is reported.
 
 byte 0:
    firmware version 1.x:
···
 /////////////////////////////////////////////////////////////////////////////
 
 
-4. Hardware version 2
+5. Hardware version 2
    ==================
 
 
-4.1 Registers
+5.1 Registers
     ~~~~~~~~~
 
 By echoing a hexadecimal value to a register it contents can be altered.
···
                                    0x7f = never i.e. tap again to release)
 
 
-4.2 Native absolute mode 6 byte packet format
+5.2 Native absolute mode 6 byte packet format
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+5.2.1 Parity checking and packet re-synchronization
+There is no parity checking, however some consistency checks can be performed.
 
-4.2.1 One finger touch
+For instance for EF113:
+        SA1= packet[0];
+        A1 = packet[1];
+        B1 = packet[2];
+        SB1= packet[3];
+        C1 = packet[4];
+        D1 = packet[5];
+        if( (((SA1 & 0x3C) != 0x3C) && ((SA1 & 0xC0) != 0x80)) || // check Byte 1
+            (((SA1 & 0x0C) != 0x0C) && ((SA1 & 0xC0) == 0x80)) || // check Byte 1 (one finger pressed)
+            (((SA1 & 0xC0) != 0x80) && (( A1 & 0xF0) != 0x00)) || // check Byte 2
+            (((SB1 & 0x3E) != 0x38) && ((SA1 & 0xC0) != 0x80)) || // check Byte 4
+            (((SB1 & 0x0E) != 0x08) && ((SA1 & 0xC0) == 0x80)) || // check Byte 4 (one finger pressed)
+            (((SA1 & 0xC0) != 0x80) && (( C1 & 0xF0) != 0x00))  ) // check Byte 5
+		// error detected
+
+For all the other ones, there are just a few constant bits:
+        if( ((packet[0] & 0x0C) != 0x04) ||
+            ((packet[3] & 0x0f) != 0x02) )
+		// error detected
+
+
+In case an error is detected, all the packets are shifted by one (and packet[0] is discarded).
+
+5.2.1 One/Three finger touch
       ~~~~~~~~~~~~~~~~
 
 byte 0:
 
    bit   7   6   5   4   3   2   1   0
-        n1  n0   .   .   .   .   R   L
+	 n1  n0  w3  w2   .   .   R   L
 
          L, R = 1 when Left, Right mouse button pressed
          n1..n0 = numbers of fingers on touchpad
···
 byte 1:
 
    bit   7   6   5   4   3   2   1   0
-         .   .   .   .   .  x10 x9  x8
+	 p7  p6  p5  p4  .  x10 x9  x8
 
 byte 2:
 
    bit   7   6   5   4   3   2   1   0
-        x7  x6  x5  x4  x4  x2  x1  x0
+	 x7  x6  x5  x4  x3  x2  x1  x0
 
          x10..x0 = absolute x value (horizontal)
 
 byte 3:
 
    bit   7   6   5   4   3   2   1   0
-         .   .   .   .   .   .   .   .
+	 n4  vf  w1  w0   .   .   .  b2
+
+	 n4 = set if more than 3 fingers (only in 3 fingers mode)
+	 vf = a kind of flag ? (only on EF123, 0 when finger is over one
+	      of the buttons, 1 otherwise)
+	 w3..w0 = width of the finger touch (not EF113)
+	 b2 (on EF113 only, 0 otherwise), b2.R.L indicates one button pressed:
+		0 = none
+		1 = Left
+		2 = Right
+		3 = Middle (Left and Right)
+		4 = Forward
+		5 = Back
+		6 = Another one
+		7 = Another one
 
 byte 4:
 
    bit   7   6   5   4   3   2   1   0
-         .   .   .   .   .   .  y9  y8
+        p3  p1  p2  p0   .   .  y9  y8
+
+	 p7..p0 = pressure (not EF113)
 
 byte 5:
 
···
 
 4.2.2 Two finger touch
       ~~~~~~~~~~~~~~~~
+
+Note that the two pairs of coordinates are not exactly the coordinates of the
+two fingers, but only the pair of the lower-left and upper-right coordinates.
+So the actual fingers might be situated on the other diagonal of the square
+defined by these two points.
 
 byte 0:
 
···
    bit   7   6   5   4   3   2   1   0
         ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
 
-         ax8..ax0 = first finger absolute x value
+	 ax8..ax0 = lower-left finger absolute x value
 
 byte 2:
 
    bit   7   6   5   4   3   2   1   0
         ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0
 
-         ay8..ay0 = first finger absolute y value
+	 ay8..ay0 = lower-left finger absolute y value
 
 byte 3:
 
···
    bit   7   6   5   4   3   2   1   0
         bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0
 
-         bx8..bx0 = second finger absolute x value
+         bx8..bx0 = upper-right finger absolute x value
 
 byte 5:
 
    bit   7   6   5   4   3   2   1   0
         by7 by8 by5 by4 by3 by2 by1 by0
 
-         by8..by0 = second finger absolute y value
+         by8..by0 = upper-right finger absolute y value

Documentation/input/rotary-encoder.txt

···
 and by triggering on falling and rising edges, the turn direction can
 be determined.
 
+Some encoders have both outputs low in stable states, whereas others also have
+a stable state with both outputs high (half-period mode).
+
 The phase diagram of these two outputs look like this:
 
                   _____       _____       _____
···
                 |<-------->|
 	          one step
 
+                |<-->|
+	          one step (half-period mode)
 
 For more information, please see
 	http://en.wikipedia.org/wiki/Rotary_encoder
···
 
 1. Events / state machine
 -------------------------
+
+In half-period mode, state a) and c) above are used to determine the
+rotational direction based on the last stable state. Events are reported in
+states b) and d) given that the new stable state is different from the last
+(i.e. the rotation was not reversed half-way).
+
+Otherwise, the following apply:
 
 a) Rising edge on channel A, channel B in low state
 	This state is used to recognize a clockwise turn
···
 	.gpio_b		= GPIO_ROTARY_B,
 	.inverted_a	= 0,
 	.inverted_b	= 0,
+	.half_period	= false,
 };
 
 static struct platform_device rotary_encoder_device = {

arch/arm/mach-tegra/include/mach/kbc.h

···
 	unsigned int debounce_cnt;
 	unsigned int repeat_cnt;
 
-	unsigned int wake_cnt; /* 0:wake on any key >1:wake on wake_cfg */
-	const struct tegra_kbc_wake_key *wake_cfg;
-
 	struct tegra_kbc_pin_cfg pin_cfg[KBC_MAX_GPIO];
 	const struct matrix_keymap_data *keymap_data;
 
 	bool wakeup;
 	bool use_fn_map;
+	bool use_ghost_filter;
 };
 #endif

drivers/input/evdev.c

···
 struct evdev_client {
 	unsigned int head;
 	unsigned int tail;
+	unsigned int packet_head; /* [future] position of the first element of next packet */
 	spinlock_t buffer_lock; /* protects access to buffer, head and tail */
 	struct fasync_struct *fasync;
 	struct evdev *evdev;
···
 		client->buffer[client->tail].type = EV_SYN;
 		client->buffer[client->tail].code = SYN_DROPPED;
 		client->buffer[client->tail].value = 0;
+
+		client->packet_head = client->tail;
+	}
+
+	if (event->type == EV_SYN && event->code == SYN_REPORT) {
+		client->packet_head = client->head;
+		kill_fasync(&client->fasync, SIGIO, POLL_IN);
 	}
 
 	spin_unlock(&client->buffer_lock);
-
-	if (event->type == EV_SYN)
-		kill_fasync(&client->fasync, SIGIO, POLL_IN);
 }
 
 /*
···
 		return error;
 
 	rcu_assign_pointer(evdev->grab, client);
-	synchronize_rcu();
 
 	return 0;
 }
···
 	spin_lock(&evdev->client_lock);
 	list_add_tail_rcu(&client->node, &evdev->client_list);
 	spin_unlock(&evdev->client_lock);
-	synchronize_rcu();
 }
 
 static void evdev_detach_client(struct evdev *evdev,
···
 	if (count < input_event_size())
 		return -EINVAL;
 
-	if (client->head == client->tail && evdev->exist &&
+	if (client->packet_head == client->tail && evdev->exist &&
 	    (file->f_flags & O_NONBLOCK))
 		return -EAGAIN;
 
 	retval = wait_event_interruptible(evdev->wait,
-		client->head != client->tail || !evdev->exist);
+		client->packet_head != client->tail || !evdev->exist);
 	if (retval)
 		return retval;
 
···
 	poll_wait(file, &evdev->wait, wait);
 
 	mask = evdev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR;
-	if (client->head != client->tail)
+	if (client->packet_head != client->tail)
 		mask |= POLLIN | POLLRDNORM;
 
 	return mask;

drivers/input/input-polldev.c

···
 #include <linux/jiffies.h>
 #include <linux/slab.h>
 #include <linux/mutex.h>
+#include <linux/workqueue.h>
 #include <linux/input-polldev.h>
 
 MODULE_AUTHOR("Dmitry Torokhov <[e-mail]>");
 MODULE_DESCRIPTION("Generic implementation of a polled input device");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION("0.1");
-
-static DEFINE_MUTEX(polldev_mutex);
-static int polldev_users;
-static struct workqueue_struct *polldev_wq;
-
-static int input_polldev_start_workqueue(void)
-{
-	int retval;
-
-	retval = mutex_lock_interruptible(&polldev_mutex);
-	if (retval)
-		return retval;
-
-	if (!polldev_users) {
-		polldev_wq = create_singlethread_workqueue("ipolldevd");
-		if (!polldev_wq) {
-			pr_err("failed to create ipolldevd workqueue\n");
-			retval = -ENOMEM;
-			goto out;
-		}
-	}
-
-	polldev_users++;
-
- out:
-	mutex_unlock(&polldev_mutex);
-	return retval;
-}
-
-static void input_polldev_stop_workqueue(void)
-{
-	mutex_lock(&polldev_mutex);
-
-	if (!--polldev_users)
-		destroy_workqueue(polldev_wq);
-
-	mutex_unlock(&polldev_mutex);
-}
 
 static void input_polldev_queue_work(struct input_polled_dev *dev)
 {
···
 	if (delay >= HZ)
 		delay = round_jiffies_relative(delay);
 
-	queue_delayed_work(polldev_wq, &dev->work, delay);
+	queue_delayed_work(system_freezable_wq, &dev->work, delay);
 }
 
 static void input_polled_device_work(struct work_struct *work)
···
 static int input_open_polled_device(struct input_dev *input)
 {
 	struct input_polled_dev *dev = input_get_drvdata(input);
-	int error;
-
-	error = input_polldev_start_workqueue();
-	if (error)
-		return error;
 
 	if (dev->open)
 		dev->open(dev);
 
 	/* Only start polling if polling is enabled */
 	if (dev->poll_interval > 0)
-		queue_delayed_work(polldev_wq, &dev->work, 0);
+		queue_delayed_work(system_freezable_wq, &dev->work, 0);
 
 	return 0;
 }
···
 	struct input_polled_dev *dev = input_get_drvdata(input);
 
 	cancel_delayed_work_sync(&dev->work);
-	/*
-	 * Clean up work struct to remove references to the workqueue.
-	 * It may be destroyed by the next call. This causes problems
-	 * at next device open-close in case of poll_interval == 0.
-	 */
-	INIT_DELAYED_WORK(&dev->work, dev->work.work.func);
-	input_polldev_stop_workqueue();
 
 	if (dev->close)
 		dev->close(dev);
···
 	input_unregister_device(dev->input);
 }
 EXPORT_SYMBOL(input_unregister_polled_device);
-

drivers/input/input.c

···
 	}
 
 	rcu_assign_pointer(dev->grab, handle);
-	synchronize_rcu();
 
  out:
 	mutex_unlock(&dev->mutex);

drivers/input/joydev.c

···
 	spin_lock(&joydev->client_lock);
 	list_add_tail_rcu(&client->node, &joydev->client_list);
 	spin_unlock(&joydev->client_lock);
-	synchronize_rcu();
 }
 
 static void joydev_detach_client(struct joydev *joydev,

drivers/input/keyboard/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called adp5588-keys.
 
+config KEYBOARD_ADP5589
+	tristate "ADP5589 I2C QWERTY Keypad and IO Expander"
+	depends on I2C
+	help
+	  Say Y here if you want to use a ADP5589 attached to your
+	  system I2C bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called adp5589-keys.
+
 config KEYBOARD_AMIGA
 	tristate "Amiga keyboard"
 	depends on AMIGA
···
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called mcs_touchkey.
+
+config KEYBOARD_MPR121
+	tristate "Freescale MPR121 Touchkey"
+	depends on I2C
+	help
+	  Say Y here if you have Freescale MPR121 touchkey controller
+	  chip in your system.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mpr121_touchkey.
 
 config KEYBOARD_IMX
 	tristate "IMX keypad support"

drivers/input/keyboard/Makefile

···
 
 obj-$(CONFIG_KEYBOARD_ADP5520)		+= adp5520-keys.o
 obj-$(CONFIG_KEYBOARD_ADP5588)		+= adp5588-keys.o
+obj-$(CONFIG_KEYBOARD_ADP5589)		+= adp5589-keys.o
 obj-$(CONFIG_KEYBOARD_AMIGA)		+= amikbd.o
 obj-$(CONFIG_KEYBOARD_ATARI)		+= atakbd.o
 obj-$(CONFIG_KEYBOARD_ATKBD)		+= atkbd.o
···
 obj-$(CONFIG_KEYBOARD_MATRIX)		+= matrix_keypad.o
 obj-$(CONFIG_KEYBOARD_MAX7359)		+= max7359_keypad.o
 obj-$(CONFIG_KEYBOARD_MCS)		+= mcs_touchkey.o
+obj-$(CONFIG_KEYBOARD_MPR121)		+= mpr121_touchkey.o
 obj-$(CONFIG_KEYBOARD_NEWTON)		+= newtonkbd.o
 obj-$(CONFIG_KEYBOARD_NOMADIK)		+= nomadik-ske-keypad.o
 obj-$(CONFIG_KEYBOARD_OMAP)		+= omap-keypad.o

drivers/input/keyboard/adp5589-keys.c

···
+/*
+ * Description:  keypad driver for ADP5589
+ *		 I2C QWERTY Keypad and IO Expander
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2010-2011 Analog Devices Inc.
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/workqueue.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+
+#include <linux/input/adp5589.h>
+
+/* GENERAL_CFG Register */
+#define OSC_EN		(1 << 7)
+#define CORE_CLK(x)	(((x) & 0x3) << 5)
+#define LCK_TRK_LOGIC	(1 << 4)
+#define LCK_TRK_GPI	(1 << 3)
+#define INT_CFG		(1 << 1)
+#define RST_CFG		(1 << 0)
+
+/* INT_EN Register */
+#define LOGIC2_IEN	(1 << 5)
+#define LOGIC1_IEN	(1 << 4)
+#define LOCK_IEN	(1 << 3)
+#define OVRFLOW_IEN	(1 << 2)
+#define GPI_IEN		(1 << 1)
+#define EVENT_IEN	(1 << 0)
+
+/* Interrupt Status Register */
+#define LOGIC2_INT	(1 << 5)
+#define LOGIC1_INT	(1 << 4)
+#define LOCK_INT	(1 << 3)
+#define OVRFLOW_INT	(1 << 2)
+#define GPI_INT		(1 << 1)
+#define EVENT_INT	(1 << 0)
+
+/* STATUS Register */
+
+#define LOGIC2_STAT	(1 << 7)
+#define LOGIC1_STAT	(1 << 6)
+#define LOCK_STAT	(1 << 5)
+#define KEC		0xF
+
+/* PIN_CONFIG_D Register */
+#define C4_EXTEND_CFG	(1 << 6)	/* RESET2 */
+#define R4_EXTEND_CFG	(1 << 5)	/* RESET1 */
+
+/* LOCK_CFG */
+#define LOCK_EN		(1 << 0)
+
+#define PTIME_MASK	0x3
+#define LTIME_MASK	0x3
+
+/* Key Event Register xy */
+#define KEY_EV_PRESSED		(1 << 7)
+#define KEY_EV_MASK		(0x7F)
+
+#define KEYP_MAX_EVENT		16
+
+#define MAXGPIO			19
+#define ADP_BANK(offs)		((offs) >> 3)
+#define ADP_BIT(offs)		(1u << ((offs) & 0x7))
+
+struct adp5589_kpad {
+	struct i2c_client *client;
+	struct input_dev *input;
+	unsigned short keycode[ADP5589_KEYMAPSIZE];
+	const struct adp5589_gpi_map *gpimap;
+	unsigned short gpimapsize;
+	unsigned extend_cfg;
+#ifdef CONFIG_GPIOLIB
+	unsigned char gpiomap[MAXGPIO];
+	bool export_gpio;
+	struct gpio_chip gc;
+	struct mutex gpio_lock;	/* Protect cached dir, dat_out */
+	u8 dat_out[3];
+	u8 dir[3];
+#endif
+};
+
+static int adp5589_read(struct i2c_client *client, u8 reg)
+{
+	int ret = i2c_smbus_read_byte_data(client, reg);
+
+	if (ret < 0)
+		dev_err(&client->dev, "Read Error\n");
+
+	return ret;
+}
+
+static int adp5589_write(struct i2c_client *client, u8 reg, u8 val)
+{
+	return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+#ifdef CONFIG_GPIOLIB
+static int adp5589_gpio_get_value(struct gpio_chip *chip, unsigned off)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+	return !!(adp5589_read(kpad->client, ADP5589_GPI_STATUS_A + bank) &
+		  bit);
+}
+
+static void adp5589_gpio_set_value(struct gpio_chip *chip,
+				   unsigned off, int val)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+	mutex_lock(&kpad->gpio_lock);
+
+	if (val)
+		kpad->dat_out[bank] |= bit;
+	else
+		kpad->dat_out[bank] &= ~bit;
+
+	adp5589_write(kpad->client, ADP5589_GPO_DATA_OUT_A + bank,
+		      kpad->dat_out[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+}
+
+static int adp5589_gpio_direction_input(struct gpio_chip *chip, unsigned off)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+	int ret;
+
+	mutex_lock(&kpad->gpio_lock);
+
+	kpad->dir[bank] &= ~bit;
+	ret = adp5589_write(kpad->client, ADP5589_GPIO_DIRECTION_A + bank,
+			    kpad->dir[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+
+	return ret;
+}
+
+static int adp5589_gpio_direction_output(struct gpio_chip *chip,
+					 unsigned off, int val)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+	int ret;
+
+	mutex_lock(&kpad->gpio_lock);
+
+	kpad->dir[bank] |= bit;
+
+	if (val)
+		kpad->dat_out[bank] |= bit;
+	else
+		kpad->dat_out[bank] &= ~bit;
+
+	ret = adp5589_write(kpad->client, ADP5589_GPO_DATA_OUT_A + bank,
+			    kpad->dat_out[bank]);
+	ret |= adp5589_write(kpad->client, ADP5589_GPIO_DIRECTION_A + bank,
+			     kpad->dir[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+
+	return ret;
+}
+
+static int __devinit adp5589_build_gpiomap(struct adp5589_kpad *kpad,
+				const struct adp5589_kpad_platform_data *pdata)
+{
+	bool pin_used[MAXGPIO];
+	int n_unused = 0;
+	int i;
+
+	memset(pin_used, false, sizeof(pin_used));
+
+	for (i = 0; i < MAXGPIO; i++)
+		if (pdata->keypad_en_mask & (1 << i))
+			pin_used[i] = true;
+
+	for (i = 0; i < kpad->gpimapsize; i++)
+		pin_used[kpad->gpimap[i].pin - ADP5589_GPI_PIN_BASE] = true;
+
+	if (kpad->extend_cfg & R4_EXTEND_CFG)
+		pin_used[4] = true;
+
+	if (kpad->extend_cfg & C4_EXTEND_CFG)
+		pin_used[12] = true;
+
+	for (i = 0; i < MAXGPIO; i++)
+		if (!pin_used[i])
+			kpad->gpiomap[n_unused++] = i;
+
+	return n_unused;
+}
+
+static int __devinit adp5589_gpio_add(struct adp5589_kpad *kpad)
+{
+	struct device *dev = &kpad->client->dev;
+	const struct adp5589_kpad_platform_data *pdata = dev->platform_data;
+	const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
+	int i, error;
+
+	if (!gpio_data)
+		return 0;
+
+	kpad->gc.ngpio = adp5589_build_gpiomap(kpad, pdata);
+	if (kpad->gc.ngpio == 0) {
+		dev_info(dev, "No unused gpios left to export\n");
+		return 0;
+	}
+
+	kpad->export_gpio = true;
+
+	kpad->gc.direction_input = adp5589_gpio_direction_input;
+	kpad->gc.direction_output = adp5589_gpio_direction_output;
+	kpad->gc.get = adp5589_gpio_get_value;
+	kpad->gc.set = adp5589_gpio_set_value;
+	kpad->gc.can_sleep = 1;
+
+	kpad->gc.base = gpio_data->gpio_start;
+	kpad->gc.label = kpad->client->name;
+	kpad->gc.owner = THIS_MODULE;
+
+	mutex_init(&kpad->gpio_lock);
+
+	error = gpiochip_add(&kpad->gc);
+	if (error) {
+		dev_err(dev, "gpiochip_add failed, err: %d\n", error);
+		return error;
+	}
+
+	for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
+		kpad->dat_out[i] = adp5589_read(kpad->client,
+						ADP5589_GPO_DATA_OUT_A + i);
+		kpad->dir[i] = adp5589_read(kpad->client,
+					    ADP5589_GPIO_DIRECTION_A + i);
+	}
+
+	if (gpio_data->setup) {
+		error = gpio_data->setup(kpad->client,
+					 kpad->gc.base, kpad->gc.ngpio,
+					 gpio_data->context);
+		if (error)
+			dev_warn(dev, "setup failed, %d\n", error);
+	}
+
+	return 0;
+}
+
+static void __devexit adp5589_gpio_remove(struct adp5589_kpad *kpad)
+{
+	struct device *dev = &kpad->client->dev;
+	const struct adp5589_kpad_platform_data *pdata = dev->platform_data;
+	const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
+	int error;
+
+	if (!kpad->export_gpio)
+		return;
+
+	if (gpio_data->teardown) {
+		error = gpio_data->teardown(kpad->client,
+					    kpad->gc.base, kpad->gc.ngpio,
+					    gpio_data->context);
+		if (error)
+			dev_warn(dev, "teardown failed %d\n", error);
+	}
+
+	error = gpiochip_remove(&kpad->gc);
+	if (error)
+		dev_warn(dev, "gpiochip_remove failed %d\n", error);
+}
+#else
+static inline int adp5589_gpio_add(struct adp5589_kpad *kpad)
+{
+	return 0;
+}
+
+static inline void adp5589_gpio_remove(struct adp5589_kpad *kpad)
+{
+}
+#endif
+
+static void adp5589_report_switches(struct adp5589_kpad *kpad,
+				    int key, int key_val)
+{
+	int i;
+
+	for (i = 0; i < kpad->gpimapsize; i++) {
+		if (key_val == kpad->gpimap[i].pin) {
+			input_report_switch(kpad->input,
+					    kpad->gpimap[i].sw_evt,
+					    key & KEY_EV_PRESSED);
+			break;
+		}
+	}
+}
+
+static void adp5589_report_events(struct adp5589_kpad *kpad, int ev_cnt)
+{
+	int i;
+
+	for (i = 0; i < ev_cnt; i++) {
+		int key = adp5589_read(kpad->client, ADP5589_FIFO_1 + i);
+		int key_val = key & KEY_EV_MASK;
+
+		if (key_val >= ADP5589_GPI_PIN_BASE &&
+		    key_val <= ADP5589_GPI_PIN_END) {
+			adp5589_report_switches(kpad, key, key_val);
+		} else {
+			input_report_key(kpad->input,
+					 kpad->keycode[key_val - 1],
+					 key & KEY_EV_PRESSED);
+		}
+	}
+}
+
+static irqreturn_t adp5589_irq(int irq, void *handle)
+{
+	struct adp5589_kpad *kpad = handle;
+	struct i2c_client *client = kpad->client;
+	int status, ev_cnt;
+
+	status = adp5589_read(client, ADP5589_INT_STATUS);
+
+	if (status & OVRFLOW_INT)	/* Unlikely and should never happen */
+		dev_err(&client->dev, "Event Overflow Error\n");
+
+	if (status & EVENT_INT) {
+		ev_cnt = adp5589_read(client, ADP5589_STATUS) & KEC;
+		if (ev_cnt) {
+			adp5589_report_events(kpad, ev_cnt);
+			input_sync(kpad->input);
+		}
+	}
+
+	adp5589_write(client, ADP5589_INT_STATUS, status);	/* Status is W1C */
+
+	return IRQ_HANDLED;
+}
+
+static int __devinit adp5589_get_evcode(struct adp5589_kpad *kpad, unsigned short key)
+{
+	int i;
+
+	for (i = 0; i < ADP5589_KEYMAPSIZE; i++)
+		if (key == kpad->keycode[i])
+			return (i + 1) | KEY_EV_PRESSED;
+
+	dev_err(&kpad->client->dev, "RESET/UNLOCK key not in keycode map\n");
+
+	return -EINVAL;
+}
+
+static int __devinit adp5589_setup(struct adp5589_kpad *kpad)
+{
+	struct i2c_client *client = kpad->client;
+	const struct adp5589_kpad_platform_data *pdata =
+	    client->dev.platform_data;
+	int i, ret;
+	unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
+	unsigned char pull_mask = 0;
+
+	ret = adp5589_write(client, ADP5589_PIN_CONFIG_A,
+			    pdata->keypad_en_mask & 0xFF);
+	ret |= adp5589_write(client, ADP5589_PIN_CONFIG_B,
+			     (pdata->keypad_en_mask >> 8) & 0xFF);
+	ret |= adp5589_write(client, ADP5589_PIN_CONFIG_C,
+			     (pdata->keypad_en_mask >> 16) & 0xFF);
+
+	if (pdata->en_keylock) {
+		ret |= adp5589_write(client, ADP5589_UNLOCK1,
+				     pdata->unlock_key1);
+		ret |= adp5589_write(client, ADP5589_UNLOCK2,
+				     pdata->unlock_key2);
+		ret |= adp5589_write(client, ADP5589_UNLOCK_TIMERS,
+				     pdata->unlock_timer & LTIME_MASK);
+		ret |= adp5589_write(client, ADP5589_LOCK_CFG, LOCK_EN);
+	}
+
+	for (i = 0; i < KEYP_MAX_EVENT; i++)
+		ret |= adp5589_read(client, ADP5589_FIFO_1 + i);
+
+	for (i = 0; i < pdata->gpimapsize; i++) {
+		unsigned short pin = pdata->gpimap[i].pin;
+
+		if (pin <= ADP5589_GPI_PIN_ROW_END) {
+			evt_mode1 |= (1 << (pin - ADP5589_GPI_PIN_ROW_BASE));
+		} else {
+			evt_mode2 |=
+			    ((1 << (pin - ADP5589_GPI_PIN_COL_BASE)) & 0xFF);
+			evt_mode3 |=
+			    ((1 << (pin - ADP5589_GPI_PIN_COL_BASE)) >> 8);
+		}
+	}
+
+	if (pdata->gpimapsize) {
+		ret |= adp5589_write(client, ADP5589_GPI_EVENT_EN_A, evt_mode1);
+		ret |= adp5589_write(client, ADP5589_GPI_EVENT_EN_B, evt_mode2);
+		ret |= adp5589_write(client, ADP5589_GPI_EVENT_EN_C, evt_mode3);
+	}
+
+	if (pdata->pull_dis_mask & pdata->pullup_en_100k &
+	    pdata->pullup_en_300k & pdata->pulldown_en_300k)
+		dev_warn(&client->dev, "Conflicting pull resistor config\n");
+
+	for (i = 0; i < MAXGPIO; i++) {
+		unsigned val = 0;
+
+		if (pdata->pullup_en_300k & (1 << i))
+			val = 0;
+		else if (pdata->pulldown_en_300k & (1 << i))
+			val = 1;
+		else if (pdata->pullup_en_100k & (1 << i))
+			val = 2;
+		else if (pdata->pull_dis_mask & (1 << i))
+			val = 3;
+
+		pull_mask |= val << (2 * (i & 0x3));
+
+		if ((i & 0x3) == 0x3 || i == MAXGPIO - 1) {
+			ret |= adp5589_write(client,
+					     ADP5589_RPULL_CONFIG_A + (i >> 2),
+					     pull_mask);
+			pull_mask = 0;
+		}
+	}
+
+	if (pdata->reset1_key_1 && pdata->reset1_key_2 && pdata->reset1_key_3) {
+		ret |= adp5589_write(client, ADP5589_RESET1_EVENT_A,
+				     adp5589_get_evcode(kpad,
+							pdata->reset1_key_1));
+		ret |= adp5589_write(client, ADP5589_RESET1_EVENT_B,
+				     adp5589_get_evcode(kpad,
+							pdata->reset1_key_2));
+		ret |= adp5589_write(client, ADP5589_RESET1_EVENT_C,
+				     adp5589_get_evcode(kpad,
+							pdata->reset1_key_3));
+		kpad->extend_cfg |= R4_EXTEND_CFG;
+	}
+
+	if (pdata->reset2_key_1 && pdata->reset2_key_2) {
+		ret |= adp5589_write(client, ADP5589_RESET2_EVENT_A,
+				     adp5589_get_evcode(kpad,
+							pdata->reset2_key_1));
+		ret |= adp5589_write(client, ADP5589_RESET2_EVENT_B,
+				     adp5589_get_evcode(kpad,
+							pdata->reset2_key_2));
+		kpad->extend_cfg |= C4_EXTEND_CFG;
+	}
+
+	if (kpad->extend_cfg) {
+		ret |= adp5589_write(client, ADP5589_RESET_CFG,
+				     pdata->reset_cfg);
+		ret |= adp5589_write(client, ADP5589_PIN_CONFIG_D,
+				     kpad->extend_cfg);
+	}
+
+	for (i = 0; i <= ADP_BANK(MAXGPIO); i++)
+		ret |= adp5589_write(client, ADP5589_DEBOUNCE_DIS_A + i,
+				     pdata->debounce_dis_mask >> (i * 8));
+
+	ret |= adp5589_write(client, ADP5589_POLL_PTIME_CFG,
+			     pdata->scan_cycle_time & PTIME_MASK);
+	ret |= adp5589_write(client, ADP5589_INT_STATUS, LOGIC2_INT |
+			     LOGIC1_INT | OVRFLOW_INT | LOCK_INT |
+			     GPI_INT | EVENT_INT);	/* Status is W1C */
+
+	ret |= adp5589_write(client, ADP5589_GENERAL_CFG,
+			     INT_CFG | OSC_EN | CORE_CLK(3));
+	ret |= adp5589_write(client, ADP5589_INT_EN,
+			     OVRFLOW_IEN | GPI_IEN | EVENT_IEN);
+
+	if (ret < 0) {
+		dev_err(&client->dev, "Write Error\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void __devinit adp5589_report_switch_state(struct adp5589_kpad *kpad)
+{
+	int gpi_stat1 = adp5589_read(kpad->client, ADP5589_GPI_STATUS_A);
+	int gpi_stat2 = adp5589_read(kpad->client, ADP5589_GPI_STATUS_B);
+	int gpi_stat3 = adp5589_read(kpad->client, ADP5589_GPI_STATUS_C);
+	int gpi_stat_tmp, pin_loc;
+	int i;
+
+	for (i = 0; i < kpad->gpimapsize; i++) {
+		unsigned short pin = kpad->gpimap[i].pin;
+
+		if (pin <= ADP5589_GPI_PIN_ROW_END) {
+			gpi_stat_tmp = gpi_stat1;
+			pin_loc = pin - ADP5589_GPI_PIN_ROW_BASE;
+		} else if ((pin - ADP5589_GPI_PIN_COL_BASE) < 8) {
+			gpi_stat_tmp = gpi_stat2;
+			pin_loc = pin - ADP5589_GPI_PIN_COL_BASE;
+		} else {
+			gpi_stat_tmp = gpi_stat3;
+			pin_loc = pin - ADP5589_GPI_PIN_COL_BASE - 8;
+		}
+
+		if (gpi_stat_tmp < 0) {
+			dev_err(&kpad->client->dev,
+				"Can't read GPIO_DAT_STAT switch"
+				" %d default to OFF\n", pin);
+			gpi_stat_tmp = 0;
+		}
+
+		input_report_switch(kpad->input,
+				    kpad->gpimap[i].sw_evt,
+				    !(gpi_stat_tmp & (1 << pin_loc)));
+	}
+
+	input_sync(kpad->input);
+}
+
+static int __devinit adp5589_probe(struct i2c_client *client,
+				   const struct i2c_device_id *id)
+{
+	struct adp5589_kpad *kpad;
+	const struct adp5589_kpad_platform_data *pdata;
+	struct input_dev *input;
+	unsigned int revid;
+	int ret, i;
+	int error;
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_BYTE_DATA)) {
+		dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
+		return -EIO;
+	}
+
+	pdata = client->dev.platform_data;
+	if (!pdata) {
+		dev_err(&client->dev, "no platform data?\n");
+		return -EINVAL;
+	}
+
+	if (!((pdata->keypad_en_mask & 0xFF) &&
+			(pdata->keypad_en_mask >> 8)) || !pdata->keymap) {
+		dev_err(&client->dev, "no rows, cols or keymap from pdata\n");
+		return -EINVAL;
+	}
+
+	if (pdata->keymapsize != ADP5589_KEYMAPSIZE) {
+		dev_err(&client->dev, "invalid keymapsize\n");
+		return -EINVAL;
+	}
+
+	if (!pdata->gpimap && pdata->gpimapsize) {
+		dev_err(&client->dev, "invalid gpimap from pdata\n");
+		return -EINVAL;
+	}
+
+	if (pdata->gpimapsize > ADP5589_GPIMAPSIZE_MAX) {
+		dev_err(&client->dev, "invalid gpimapsize\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < pdata->gpimapsize; i++) {
+		unsigned short pin = pdata->gpimap[i].pin;
+
+		if (pin < ADP5589_GPI_PIN_BASE || pin > ADP5589_GPI_PIN_END) {
+			dev_err(&client->dev, "invalid gpi pin data\n");
+			return -EINVAL;
+		}
+
+		if ((1 << (pin - ADP5589_GPI_PIN_ROW_BASE)) &
+				pdata->keypad_en_mask) {
+			dev_err(&client->dev, "invalid gpi row/col data\n");
+			return -EINVAL;
+		}
+	}
+
+	if (!client->irq) {
+		dev_err(&client->dev, "no IRQ?\n");
+		return -EINVAL;
+	}
+
+	kpad = kzalloc(sizeof(*kpad), GFP_KERNEL);
+	input = input_allocate_device();
+	if (!kpad || !input) {
+		error = -ENOMEM;
+		goto err_free_mem;
+	}
+
+	kpad->client = client;
+	kpad->input = input;
+
+	ret = adp5589_read(client, ADP5589_ID);
+	if (ret < 0) {
+		error = ret;
+		goto err_free_mem;
+	}
+
+	revid = (u8) ret & ADP5589_DEVICE_ID_MASK;
+
+	input->name = client->name;
+	input->phys = "adp5589-keys/input0";
+	input->dev.parent = &client->dev;
+
+	input_set_drvdata(input, kpad);
+
+	input->id.bustype = BUS_I2C;
+	input->id.vendor = 0x0001;
+	input->id.product = 0x0001;
+	input->id.version = revid;
+
+	input->keycodesize = sizeof(kpad->keycode[0]);
+	input->keycodemax = pdata->keymapsize;
+	input->keycode = kpad->keycode;
+
+	memcpy(kpad->keycode, pdata->keymap,
+	       pdata->keymapsize * input->keycodesize);
+
+	kpad->gpimap = pdata->gpimap;
+	kpad->gpimapsize = pdata->gpimapsize;
+
+	/* setup input device */
+	__set_bit(EV_KEY, input->evbit);
+
+	if (pdata->repeat)
+		__set_bit(EV_REP, input->evbit);
+
+	for (i = 0; i < input->keycodemax; i++)
+		__set_bit(kpad->keycode[i] & KEY_MAX, input->keybit);
+	__clear_bit(KEY_RESERVED, input->keybit);
+
+	if (kpad->gpimapsize)
+		__set_bit(EV_SW, input->evbit);
+	for (i = 0; i < kpad->gpimapsize; i++)
+		__set_bit(kpad->gpimap[i].sw_evt, input->swbit);
+
+	error = input_register_device(input);
+	if (error) {
+		dev_err(&client->dev, "unable to register input device\n");
+		goto err_free_mem;
+	}
+
+	error = request_threaded_irq(client->irq, NULL, adp5589_irq,
+				     IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+				     client->dev.driver->name, kpad);
+	if (error) {
+		dev_err(&client->dev, "irq %d busy?\n", client->irq);
+		goto err_unreg_dev;
+	}
+
+	error = adp5589_setup(kpad);
+	if (error)
+		goto err_free_irq;
+
+	if (kpad->gpimapsize)
+		adp5589_report_switch_state(kpad);
+
+	error = adp5589_gpio_add(kpad);
+	if (error)
+		goto err_free_irq;
+
+	device_init_wakeup(&client->dev, 1);
+	i2c_set_clientdata(client, kpad);
+
+	dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
+	return 0;
+
+err_free_irq:
+	free_irq(client->irq, kpad);
+err_unreg_dev:
+	input_unregister_device(input);
+	input = NULL;
+err_free_mem:
+	input_free_device(input);
+	kfree(kpad);
+
+	return error;
+}
+
+static int __devexit adp5589_remove(struct i2c_client *client)
+{
+	struct adp5589_kpad *kpad = i2c_get_clientdata(client);
+
+	adp5589_write(client, ADP5589_GENERAL_CFG, 0);
+	free_irq(client->irq, kpad);
+	input_unregister_device(kpad->input);
+	adp5589_gpio_remove(kpad);
+	kfree(kpad);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int adp5589_suspend(struct device *dev)
+{
+	struct adp5589_kpad *kpad = dev_get_drvdata(dev);
+	struct i2c_client *client = kpad->client;
+
+	disable_irq(client->irq);
+
+	if (device_may_wakeup(&client->dev))
+		enable_irq_wake(client->irq);
+
+	return 0;
+}
+
+static int adp5589_resume(struct device *dev)
+{
+	struct adp5589_kpad *kpad = dev_get_drvdata(dev);
+	struct i2c_client *client = kpad->client;
+
+	if (device_may_wakeup(&client->dev))
+		disable_irq_wake(client->irq);
+
+	enable_irq(client->irq);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(adp5589_dev_pm_ops, adp5589_suspend, adp5589_resume);
+
+static const struct i2c_device_id adp5589_id[] = {
+	{"adp5589-keys", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, adp5589_id);
+
+static struct i2c_driver adp5589_driver = {
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.owner = THIS_MODULE,
+		.pm = &adp5589_dev_pm_ops,
+	},
+	.probe = adp5589_probe,
+	.remove = __devexit_p(adp5589_remove),
+	.id_table = adp5589_id,
+};
+
+static int __init adp5589_init(void)
+{
+	return i2c_add_driver(&adp5589_driver);
+}
+module_init(adp5589_init);
+
+static void __exit adp5589_exit(void)
+{
+	i2c_del_driver(&adp5589_driver);
+}
+module_exit(adp5589_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michael Hennerich <[e-mail]>");
+MODULE_DESCRIPTION("ADP5589 Keypad driver");

drivers/input/keyboard/gpio_keys.c

···
 	unsigned int type = button->type ?: EV_KEY;
 	int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0) ^ button->active_low;
 
-	input_event(input, type, button->code, !!state);
+	if (type == EV_ABS) {
+		if (state)
+			input_event(input, type, button->code, button->value);
+	} else {
+		input_event(input, type, button->code, !!state);
+	}
 	input_sync(input);
 }
 
···
 					 struct gpio_button_data *bdata,
 					 struct gpio_keys_button *button)
 {
-	char *desc = button->desc ? button->desc : "gpio_keys";
+	const char *desc = button->desc ? button->desc : "gpio_keys";
 	struct device *dev = &pdev->dev;
 	unsigned long irqflags;
 	int irq, error;
···
 	platform_set_drvdata(pdev, ddata);
 	input_set_drvdata(input, ddata);
 
-	input->name = pdev->name;
+	input->name = pdata->name ? : pdev->name;
 	input->phys = "gpio-keys/input0";
 	input->dev.parent = &pdev->dev;
 	input->open = gpio_keys_open;

drivers/input/keyboard/mpr121_touchkey.c

···
+/*
+ * Touchkey driver for Freescale MPR121 Controllor
+ *
+ * Copyright (C) 2011 Freescale Semiconductor, Inc.
+ * Author: Zhang Jiejing <[e-mail]>
+ *
+ * Based on mcs_touchkey.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/i2c/mpr121_touchkey.h>
+
+/* Register definitions */
+#define ELE_TOUCH_STATUS_0_ADDR	0x0
+#define ELE_TOUCH_STATUS_1_ADDR	0X1
+#define MHD_RISING_ADDR		0x2b
+#define NHD_RISING_ADDR		0x2c
+#define NCL_RISING_ADDR		0x2d
+#define FDL_RISING_ADDR		0x2e
+#define MHD_FALLING_ADDR	0x2f
+#define NHD_FALLING_ADDR	0x30
+#define NCL_FALLING_ADDR	0x31
+#define FDL_FALLING_ADDR	0x32
+#define ELE0_TOUCH_THRESHOLD_ADDR	0x41
+#define ELE0_RELEASE_THRESHOLD_ADDR	0x42
+#define AFE_CONF_ADDR			0x5c
+#define FILTER_CONF_ADDR		0x5d
+
+/*
+ * ELECTRODE_CONF_ADDR: This register configures the number of
+ * enabled capacitance sensing inputs and its run/suspend mode.
+ */
+#define ELECTRODE_CONF_ADDR		0x5e
+#define AUTO_CONFIG_CTRL_ADDR		0x7b
+#define AUTO_CONFIG_USL_ADDR		0x7d
+#define AUTO_CONFIG_LSL_ADDR		0x7e
+#define AUTO_CONFIG_TL_ADDR		0x7f
+
+/* Threshold of touch/release trigger */
+#define TOUCH_THRESHOLD			0x0f
+#define RELEASE_THRESHOLD		0x0a
+/* Masks for touch and release triggers */
+#define TOUCH_STATUS_MASK		0xfff
+/* MPR121 has 12 keys */
+#define MPR121_MAX_KEY_COUNT		12
+
+struct mpr121_touchkey {
+	struct i2c_client	*client;
+	struct input_dev	*input_dev;
+	unsigned int		key_val;
+	unsigned int		statusbits;
+	unsigned int		keycount;
+	u16			keycodes[MPR121_MAX_KEY_COUNT];
+};
+
+struct mpr121_init_register {
+	int addr;
+	u8 val;
+};
+
+static const struct mpr121_init_register init_reg_table[] __devinitconst = {
+	{ MHD_RISING_ADDR,	0x1 },
+	{ NHD_RISING_ADDR,	0x1 },
+	{ MHD_FALLING_ADDR,	0x1 },
+	{ NHD_FALLING_ADDR,	0x1 },
+	{ NCL_FALLING_ADDR,	0xff },
+	{ FDL_FALLING_ADDR,	0x02 },
+	{ FILTER_CONF_ADDR,	0x04 },
+	{ AFE_CONF_ADDR,	0x0b },
+	{ AUTO_CONFIG_CTRL_ADDR, 0x0b },
+};
+
+static irqreturn_t mpr_touchkey_interrupt(int irq, void *dev_id)
+{
+	struct mpr121_touchkey *mpr121 = dev_id;
+	struct i2c_client *client = mpr121->client;
+	struct input_dev *input = mpr121->input_dev;
+	unsigned int key_num, key_val, pressed;
+	int reg;
+
+	reg = i2c_smbus_read_byte_data(client, ELE_TOUCH_STATUS_1_ADDR);
+	if (reg < 0) {
+		dev_err(&client->dev, "i2c read error [%d]\n", reg);
+		goto out;
+	}
+
+	reg <<= 8;
+	reg |= i2c_smbus_read_byte_data(client, ELE_TOUCH_STATUS_0_ADDR);
+	if (reg < 0) {
+		dev_err(&client->dev, "i2c read error [%d]\n", reg);
+		goto out;
+	}
+
+	reg &= TOUCH_STATUS_MASK;
+	/* use old press bit to figure out which bit changed */
+	key_num = ffs(reg ^ mpr121->statusbits) - 1;
+	pressed = reg & (1 << key_num);
+	mpr121->statusbits = reg;
+
+	key_val = mpr121->keycodes[key_num];
+
+	input_event(input, EV_MSC, MSC_SCAN, key_num);
+	input_report_key(input, key_val, pressed);
+	input_sync(input);
+
+	dev_dbg(&client->dev, "key %d %d %s\n", key_num, key_val,
+		pressed ? "pressed" : "released");
+
+out:
+	return IRQ_HANDLED;
+}
+
+static int __devinit mpr121_phys_init(const struct mpr121_platform_data *pdata,
+				      struct mpr121_touchkey *mpr121,
+				      struct i2c_client *client)
+{
+	const struct mpr121_init_register *reg;
+	unsigned char usl, lsl, tl;
+	int i, t, vdd, ret;
+
+	/* Set up touch/release threshold for ele0-ele11 */
+	for (i = 0; i <= MPR121_MAX_KEY_COUNT; i++) {
+		t = ELE0_TOUCH_THRESHOLD_ADDR + (i * 2);
+		ret = i2c_smbus_write_byte_data(client, t, TOUCH_THRESHOLD);
+		if (ret < 0)
+			goto err_i2c_write;
+		ret = i2c_smbus_write_byte_data(client, t + 1,
+						RELEASE_THRESHOLD);
+		if (ret < 0)
+			goto err_i2c_write;
+	}
+
+	/* Set up init register */
+	for (i = 0; i < ARRAY_SIZE(init_reg_table); i++) {
+		reg = &init_reg_table[i];
+		ret = i2c_smbus_write_byte_data(client, reg->addr, reg->val);
+		if (ret < 0)
+			goto err_i2c_write;
+	}
+
+
+	/*
+	 * Capacitance on sensing input varies and needs to be compensated.
+	 * The internal MPR121-auto-configuration can do this if it's
+	 * registers are set properly (based on pdata->vdd_uv).
+	 */
+	vdd = pdata->vdd_uv / 1000;
+	usl = ((vdd - 700) * 256) / vdd;
+	lsl = (usl * 65) / 100;
+	tl = (usl * 90) / 100;
+	ret = i2c_smbus_write_byte_data(client, AUTO_CONFIG_USL_ADDR, usl);
+	ret |= i2c_smbus_write_byte_data(client, AUTO_CONFIG_LSL_ADDR, lsl);
+	ret |= i2c_smbus_write_byte_data(client, AUTO_CONFIG_TL_ADDR, tl);
+	ret |= i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR,
+					 mpr121->keycount);
+	if (ret != 0)
+		goto err_i2c_write;
+
+	dev_dbg(&client->dev, "set up with %x keys.\n", mpr121->keycount);
+
+	return 0;
+
+err_i2c_write:
+	dev_err(&client->dev, "i2c write error: %d\n", ret);
+	return ret;
+}
+
+static int __devinit mpr_touchkey_probe(struct i2c_client *client,
+					const struct i2c_device_id *id)
+{
+	const struct mpr121_platform_data *pdata = client->dev.platform_data;
+	struct mpr121_touchkey *mpr121;
+	struct input_dev *input_dev;
+	int error;
+	int i;
+
+	if (!pdata) {
+		dev_err(&client->dev, "no platform data defined\n");
+		return -EINVAL;
+	}
+
+	if (!pdata->keymap || !pdata->keymap_size) {
+		dev_err(&client->dev, "missing keymap data\n");
+		return -EINVAL;
+	}
+
+	if (pdata->keymap_size > MPR121_MAX_KEY_COUNT) {
+		dev_err(&client->dev, "too many keys defined\n");
+		return -EINVAL;
+	}
+
+	if (!client->irq) {
+		dev_err(&client->dev, "irq number should not be zero\n");
+		return -EINVAL;
+	}
+
+	mpr121 = kzalloc(sizeof(struct mpr121_touchkey), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!mpr121 || !input_dev) {
+		dev_err(&client->dev, "Failed to allocate memory\n");
+		error = -ENOMEM;
+		goto err_free_mem;
+	}
+
+	mpr121->client = client;
+	mpr121->input_dev = input_dev;
+	mpr121->keycount = pdata->keymap_size;
+
+	input_dev->name = "Freescale MPR121 Touchkey";
+	input_dev->id.bustype = BUS_I2C;
+	input_dev->dev.parent = &client->dev;
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
+
+	input_dev->keycode = mpr121->keycodes;
+	input_dev->keycodesize = sizeof(mpr121->keycodes[0]);
+	input_dev->keycodemax = mpr121->keycount;
+
+	for (i = 0; i < pdata->keymap_size; i++) {
+		input_set_capability(input_dev, EV_KEY, pdata->keymap[i]);
+		mpr121->keycodes[i] = pdata->keymap[i];
+	}
+
+	error = mpr121_phys_init(pdata, mpr121, client);
+	if (error) {
+		dev_err(&client->dev, "Failed to init register\n");
+		goto err_free_mem;
+	}
+
+	error = request_threaded_irq(client->irq, NULL,
+				     mpr_touchkey_interrupt,
+				     IRQF_TRIGGER_FALLING,
+				     client->dev.driver->name, mpr121);
+	if (error) {
+		dev_err(&client->dev, "Failed to register interrupt\n");
+		goto err_free_mem;
+	}
+
+	error = input_register_device(input_dev);
+	if (error)
+		goto err_free_irq;
+
+	i2c_set_clientdata(client, mpr121);
+	device_init_wakeup(&client->dev, pdata->wakeup);
+
+	return 0;
+
+err_free_irq:
+	free_irq(client->irq, mpr121);
+err_free_mem:
+	input_free_device(input_dev);
+	kfree(mpr121);
+	return error;
+}
+
+static int __devexit mpr_touchkey_remove(struct i2c_client *client)
+{
+	struct mpr121_touchkey *mpr121 = i2c_get_clientdata(client);
+
+	free_irq(client->irq, mpr121);
+	input_unregister_device(mpr121->input_dev);
+	kfree(mpr121);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mpr_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+
+	if (device_may_wakeup(&client->dev))
+		enable_irq_wake(client->irq);
+
+	i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR, 0x00);
+
+	return 0;
+}
+
+static int mpr_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct mpr121_touchkey *mpr121 = i2c_get_clientdata(client);
+
+	if (device_may_wakeup(&client->dev))
+		disable_irq_wake(client->irq);
+
+	i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR,
+				  mpr121->keycount);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mpr121_touchkey_pm_ops, mpr_suspend, mpr_resume);
+
+static const struct i2c_device_id mpr121_id[] = {
+	{ "mpr121_touchkey", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, mpr121_id);
+
+static struct i2c_driver mpr_touchkey_driver = {
+	.driver = {
+		.name	= "mpr121",
+		.owner	= THIS_MODULE,
+		.pm	= &mpr121_touchkey_pm_ops,
+	},
+	.id_table	= mpr121_id,
+	.probe		= mpr_touchkey_probe,
+	.remove		= __devexit_p(mpr_touchkey_remove),
+};
+
+static int __init mpr_touchkey_init(void)
+{
+	return i2c_add_driver(&mpr_touchkey_driver);
+}
+module_init(mpr_touchkey_init);
+
+static void __exit mpr_touchkey_exit(void)
+{
+	i2c_del_driver(&mpr_touchkey_driver);
+}
+module_exit(mpr_touchkey_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Zhang Jiejing <[e-mail]>");
+MODULE_DESCRIPTION("Touch Key driver for Freescale MPR121 Chip");

drivers/input/keyboard/omap-keypad.c

···
 	return 0;
 err5:
 	for (i = irq_idx - 1; i >=0; i--)
-		free_irq(row_gpios[i], NULL);
+		free_irq(row_gpios[i], omap_kp);
 err4:
 	input_unregister_device(omap_kp->input);
 	input_dev = NULL;
···
 			gpio_free(col_gpios[i]);
 		for (i = 0; i < omap_kp->rows; i++) {
 			gpio_free(row_gpios[i]);
-			free_irq(gpio_to_irq(row_gpios[i]), NULL);
+			free_irq(gpio_to_irq(row_gpios[i]), omap_kp);
 		}
 	} else {
 		omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
-		free_irq(omap_kp->irq, NULL);
+		free_irq(omap_kp->irq, omap_kp);
 	}
 
 	del_timer_sync(&omap_kp->timer);

drivers/input/keyboard/qt1070.c

···
 	{ "qt1070", 0 },
 	{ },
 };
+MODULE_DEVICE_TABLE(i2c, qt1070_id);
 
 static struct i2c_driver qt1070_driver = {
 	.driver	= {

drivers/input/keyboard/sh_keysc.c

···
 #include <linux/input.h>
 #include <linux/input/sh_keysc.h>
 #include <linux/bitmap.h>
-#include <linux/clk.h>
+#include <linux/pm_runtime.h>
 #include <linux/io.h>
 #include <linux/slab.h>
 
···
 
 struct sh_keysc_priv {
 	void __iomem *iomem_base;
-	struct clk *clk;
 	DECLARE_BITMAP(last_keys, SH_KEYSC_MAXKEYS);
 	struct input_dev *input;
 	struct sh_keysc_info pdata;
···
 	struct sh_keysc_info *pdata;
 	struct resource *res;
 	struct input_dev *input;
-	char clk_name[8];
 	int i;
 	int irq, error;
 
···
 		goto err1;
 	}
 
-	snprintf(clk_name, sizeof(clk_name), "keysc%d", pdev->id);
-	priv->clk = clk_get(&pdev->dev, clk_name);
-	if (IS_ERR(priv->clk)) {
-		dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
-		error = PTR_ERR(priv->clk);
-		goto err2;
-	}
-
 	priv->input = input_allocate_device();
 	if (!priv->input) {
 		dev_err(&pdev->dev, "failed to allocate input device\n");
 		error = -ENOMEM;
-		goto err3;
+		goto err2;
 	}
 
 	input = priv->input;
···
 	input->keycodesize = sizeof(pdata->keycodes[0]);
 	input->keycodemax = ARRAY_SIZE(pdata->keycodes);
 
-	error = request_irq(irq, sh_keysc_isr, 0, pdev->name, pdev);
+	error = request_threaded_irq(irq, NULL, sh_keysc_isr, IRQF_ONESHOT,
+				     dev_name(&pdev->dev), pdev);
 	if (error) {
 		dev_err(&pdev->dev, "failed to request IRQ\n");
-		goto err4;
+		goto err3;
 	}
 
 	for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
···
 	error = input_register_device(input);
 	if (error) {
 		dev_err(&pdev->dev, "failed to register input device\n");
-		goto err5;
+		goto err4;
 	}
 
-	clk_enable(priv->clk);
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_get_sync(&pdev->dev);
 
 	sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) |
 		       pdata->scan_timing);
···
 
 	return 0;
 
- err5:
-	free_irq(irq, pdev);
  err4:
-	input_free_device(input);
+	free_irq(irq, pdev);
  err3:
-	clk_put(priv->clk);
+	input_free_device(input);
  err2:
 	iounmap(priv->iomem_base);
  err1:
···
 	free_irq(platform_get_irq(pdev, 0), pdev);
 	iounmap(priv->iomem_base);
 
-	clk_disable(priv->clk);
-	clk_put(priv->clk);
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 
 	platform_set_drvdata(pdev, NULL);
 	kfree(priv);
···
 	return 0;
 }
 
+#if CONFIG_PM_SLEEP
 static int sh_keysc_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
···
 	value = sh_keysc_read(priv, KYCR1);
 
 	if (device_may_wakeup(dev)) {
-		value |= 0x80;
+		sh_keysc_write(priv, KYCR1, value | 0x80);
 		enable_irq_wake(irq);
 	} else {
-		value &= ~0x80;
+		sh_keysc_write(priv, KYCR1, value & ~0x80);
+		pm_runtime_put_sync(dev);
 	}
-
-	sh_keysc_write(priv, KYCR1, value);
 
 	return 0;
 }
···
 
 	if (device_may_wakeup(dev))
 		disable_irq_wake(irq);
+	else
+		pm_runtime_get_sync(dev);
 
 	return 0;
 }
+#endif
 
-static const struct dev_pm_ops sh_keysc_dev_pm_ops = {
-	.suspend = sh_keysc_suspend,
-	.resume = sh_keysc_resume,
-};
+static SIMPLE_DEV_PM_OPS(sh_keysc_dev_pm_ops,
+			 sh_keysc_suspend, sh_keysc_resume);
 
-struct platform_driver sh_keysc_device_driver = {
+static struct platform_driver sh_keysc_device_driver = {
 	.probe		= sh_keysc_probe,
 	.remove		= __devexit_p(sh_keysc_remove),
 	.driver		= {

drivers/input/keyboard/tegra-kbc.c

···
 	void __iomem *mmio;
 	struct input_dev *idev;
 	unsigned int irq;
-	unsigned int wake_enable_rows;
-	unsigned int wake_enable_cols;
 	spinlock_t lock;
 	unsigned int repoll_dly;
 	unsigned long cp_dly_jiffies;
 	bool use_fn_map;
+	bool use_ghost_filter;
 	const struct tegra_kbc_platform_data *pdata;
 	unsigned short keycode[KBC_MAX_KEY * 2];
 	unsigned short current_keys[KBC_MAX_KPENT];
···
 	unsigned int num_down = 0;
 	unsigned long flags;
 	bool fn_keypress = false;
+	bool key_in_same_row = false;
+	bool key_in_same_col = false;
 
 	spin_lock_irqsave(&kbc->lock, flags);
 	for (i = 0; i < KBC_MAX_KPENT; i++) {
···
 	}
 
 	/*
+	 * Matrix keyboard designs are prone to keyboard ghosting.
+	 * Ghosting occurs if there are 3 keys such that -
+	 * any 2 of the 3 keys share a row, and any 2 of them share a column.
+	 * If so ignore the key presses for this iteration.
+	 */
+	if ((kbc->use_ghost_filter) && (num_down >= 3)) {
+		for (i = 0; i < num_down; i++) {
+			unsigned int j;
+			u8 curr_col = scancodes[i] & 0x07;
+			u8 curr_row = scancodes[i] >> KBC_ROW_SHIFT;
+
+			/*
+			 * Find 2 keys such that one key is in the same row
+			 * and the other is in the same column as the i-th key.
+			 */
+			for (j = i + 1; j < num_down; j++) {
+				u8 col = scancodes[j] & 0x07;
+				u8 row = scancodes[j] >> KBC_ROW_SHIFT;
+
+				if (col == curr_col)
+					key_in_same_col = true;
+				if (row == curr_row)
+					key_in_same_row = true;
+			}
+		}
+	}
+
+	/*
 	 * If the platform uses Fn keymaps, translate keys on a Fn keypress.
 	 * Function keycodes are KBC_MAX_KEY apart from the plain keycodes.
 	 */
···
 	}
 
 	spin_unlock_irqrestore(&kbc->lock, flags);
+
+	/* Ignore the key presses for this iteration? */
+	if (key_in_same_col && key_in_same_row)
+		return;
 
 	tegra_kbc_report_released_keys(kbc->idev,
 				       kbc->current_keys, kbc->num_pressed_keys,
···
 	int i;
 	unsigned int rst_val;
 
-	BUG_ON(pdata->wake_cnt > KBC_MAX_KEY);
-	rst_val = (filter && pdata->wake_cnt) ? ~0 : 0;
+	/* Either mask all keys or none. */
+	rst_val = (filter && !pdata->wakeup) ? ~0 : 0;
 
 	for (i = 0; i < KBC_MAX_ROW; i++)
 		writel(rst_val, kbc->mmio + KBC_ROW0_MASK_0 + i * 4);
-
-	if (filter) {
-		for (i = 0; i < pdata->wake_cnt; i++) {
-			u32 val, addr;
-			addr = pdata->wake_cfg[i].row * 4 + KBC_ROW0_MASK_0;
-			val = readl(kbc->mmio + addr);
-			val &= ~(1 << pdata->wake_cfg[i].col);
-			writel(val, kbc->mmio + addr);
-		}
-	}
 }
 
 static void tegra_kbc_config_pins(struct tegra_kbc *kbc)
···
 	struct resource *res;
 	int irq;
 	int err;
-	int i;
 	int num_rows = 0;
 	unsigned int debounce_cnt;
 	unsigned int scan_time_rows;
···
 		goto err_iounmap;
 	}
 
-	kbc->wake_enable_rows = 0;
-	kbc->wake_enable_cols = 0;
-	for (i = 0; i < pdata->wake_cnt; i++) {
-		kbc->wake_enable_rows |= (1 << pdata->wake_cfg[i].row);
-		kbc->wake_enable_cols |= (1 << pdata->wake_cfg[i].col);
-	}
-
 	/*
 	 * The time delay between two consecutive reads of the FIFO is
 	 * the sum of the repeat time and the time taken for scanning
···
 		input_dev->keycodemax *= 2;
 
 	kbc->use_fn_map = pdata->use_fn_map;
+	kbc->use_ghost_filter = pdata->use_ghost_filter;
 	keymap_data = pdata->keymap_data ?: &tegra_kbc_default_keymap_data;
 	matrix_keypad_build_keymap(keymap_data, KBC_ROW_SHIFT,
 				   input_dev->keycode, input_dev->keybit);

drivers/input/misc/ad714x.c

···
 struct ad714x_wheel_drv {
 	int abs_pos;
 	int flt_pos;
-	int pre_mean_value;
 	int pre_highest_stage;
-	int pre_mean_value_no_offset;
-	int mean_value;
-	int mean_value_no_offset;
-	int pos_offset;
-	int pos_ratio;
 	int highest_stage;
 	enum ad714x_device_state state;
 	struct input_dev *input;
···
 	unsigned short data;
 	unsigned short mask;
 
-	mask = ((1 << (end_stage + 1)) - 1) - (1 << start_stage);
+	mask = ((1 << (end_stage + 1)) - 1) - ((1 << start_stage) - 1);
 
 	ad714x->read(ad714x->dev, STG_COM_INT_EN_REG, &data);
-	data |= 1 << start_stage;
+	data |= 1 << end_stage;
 	ad714x->write(ad714x->dev, STG_COM_INT_EN_REG, data);
 
 	ad714x->read(ad714x->dev, STG_HIGH_INT_EN_REG, &data);
···
 	unsigned short data;
 	unsigned short mask;
 
-	mask = ((1 << (end_stage + 1)) - 1) - (1 << start_stage);
+	mask = ((1 << (end_stage + 1)) - 1) - ((1 << start_stage) - 1);
 
 	ad714x->read(ad714x->dev, STG_COM_INT_EN_REG, &data);
-	data &= ~(1 << start_stage);
+	data &= ~(1 << end_stage);
 	ad714x->write(ad714x->dev, STG_COM_INT_EN_REG, data);
 
 	ad714x->read(ad714x->dev, STG_HIGH_INT_EN_REG, &data);
···
 				ad714x_slider_cal_highest_stage(ad714x, idx);
 				ad714x_slider_cal_abs_pos(ad714x, idx);
 				ad714x_slider_cal_flt_pos(ad714x, idx);
-
 				input_report_abs(sw->input, ABS_X, sw->flt_pos);
 				input_report_key(sw->input, BTN_TOUCH, 1);
 			} else {
···
 /*
  * When the scroll wheel is activated, we compute the absolute position based
  * on the sensor values. To calculate the position, we first determine the
- * sensor that has the greatest response among the 8 sensors that constitutes
- * the scrollwheel. Then we determined the 2 sensors on either sides of the
+ * sensor that has the greatest response among the sensors that constitutes
+ * the scrollwheel. Then we determined the sensors on either sides of the
  * sensor with the highest response and we apply weights to these sensors. The
- * result of this computation gives us the mean value which defined by the
- * following formula:
- * For i= second_before_highest_stage to i= second_after_highest_stage
- *         v += Sensor response(i)*WEIGHT*(i+3)
- *         w += Sensor response(i)
- * Mean_Value=v/w
- * pos_on_scrollwheel = (Mean_Value - position_offset) / position_ratio
+ * result of this computation gives us the mean value.
  */
 
-#define WEIGHT_FACTOR 30
-/* This constant prevents the "PositionOffset" from reaching a big value */
-#define OFFSET_POSITION_CLAMP	120
 static void ad714x_wheel_cal_abs_pos(struct ad714x_chip *ad714x, int idx)
 {
 	struct ad714x_wheel_plat *hw = &ad714x->hw->wheel[idx];
 	struct ad714x_wheel_drv *sw = &ad714x->sw->wheel[idx];
 	int stage_num = hw->end_stage - hw->start_stage + 1;
-	int second_before, first_before, highest, first_after, second_after;
+	int first_before, highest, first_after;
 	int a_param, b_param;
 
-	/* Calculate Mean value */
-
-	second_before = (sw->highest_stage + stage_num - 2) % stage_num;
 	first_before = (sw->highest_stage + stage_num - 1) % stage_num;
 	highest = sw->highest_stage;
 	first_after = (sw->highest_stage + stage_num + 1) % stage_num;
-	second_after = (sw->highest_stage + stage_num + 2) % stage_num;
 
-	if (((sw->highest_stage - hw->start_stage) > 1) &&
-	    ((hw->end_stage - sw->highest_stage) > 1)) {
-		a_param = ad714x->sensor_val[second_before] *
-			(second_before - hw->start_stage + 3) +
-			ad714x->sensor_val[first_before] *
-			(second_before - hw->start_stage + 3) +
-			ad714x->sensor_val[highest] *
-			(second_before - hw->start_stage + 3) +
-			ad714x->sensor_val[first_after] *
-			(first_after - hw->start_stage + 3) +
-			ad714x->sensor_val[second_after] *
-			(second_after - hw->start_stage + 3);
-	} else {
-		a_param = ad714x->sensor_val[second_before] *
-			(second_before - hw->start_stage + 1) +
-			ad714x->sensor_val[first_before] *
-			(second_before - hw->start_stage + 2) +
-			ad714x->sensor_val[highest] *
-			(second_before - hw->start_stage + 3) +
-			ad714x->sensor_val[first_after] *
-			(first_after - hw->start_stage + 4) +
-			ad714x->sensor_val[second_after] *
-			(second_after - hw->start_stage + 5);
-	}
-	a_param *= WEIGHT_FACTOR;
-
-	b_param = ad714x->sensor_val[second_before] +
+	a_param = ad714x->sensor_val[highest] *
+		(highest - hw->start_stage) +
+		ad714x->sensor_val[first_before] *
+		(highest - hw->start_stage - 1) +
+		ad714x->sensor_val[first_after] *
+		(highest - hw->start_stage + 1);
+	b_param = ad714x->sensor_val[highest] +
 		ad714x->sensor_val[first_before] +
-		ad714x->sensor_val[highest] +
-		ad714x->sensor_val[first_after] +
-		ad714x->sensor_val[second_after];
+		ad714x->sensor_val[first_after];
 
-	sw->pre_mean_value = sw->mean_value;
-	sw->mean_value = a_param / b_param;
+	sw->abs_pos = ((hw->max_coord / (hw->end_stage - hw->start_stage)) *
+			a_param) / b_param;
 
-	/* Calculate the offset */
-
-	if ((sw->pre_highest_stage == hw->end_stage) &&
-			(sw->highest_stage == hw->start_stage))
-		sw->pos_offset = sw->mean_value;
-	else if ((sw->pre_highest_stage == hw->start_stage) &&
-			(sw->highest_stage == hw->end_stage))
-		sw->pos_offset = sw->pre_mean_value;
-
-	if (sw->pos_offset > OFFSET_POSITION_CLAMP)
-		sw->pos_offset = OFFSET_POSITION_CLAMP;
-
-	/* Calculate the mean value without the offset */
-
-	sw->pre_mean_value_no_offset = sw->mean_value_no_offset;
-	sw->mean_value_no_offset = sw->mean_value - sw->pos_offset;
-	if (sw->mean_value_no_offset < 0)
-		sw->mean_value_no_offset = 0;
-
-	/* Calculate ratio to scale down to NUMBER_OF_WANTED_POSITIONS */
-
-	if ((sw->pre_highest_stage == hw->end_stage) &&
-			(sw->highest_stage == hw->start_stage))
-		sw->pos_ratio = (sw->pre_mean_value_no_offset * 100) /
-			hw->max_coord;
-	else if ((sw->pre_highest_stage == hw->start_stage) &&
-			(sw->highest_stage == hw->end_stage))
-		sw->pos_ratio = (sw->mean_value_no_offset * 100) /
-			hw->max_coord;
-	sw->abs_pos = (sw->mean_value_no_offset * 100) / sw->pos_ratio;
 	if (sw->abs_pos > hw->max_coord)
 		sw->abs_pos = hw->max_coord;
+	else if (sw->abs_pos < 0)
+		sw->abs_pos = 0;
 }
 
 static void ad714x_wheel_cal_flt_pos(struct ad714x_chip *ad714x, int idx)
···
 				ad714x_wheel_cal_highest_stage(ad714x, idx);
 				ad714x_wheel_cal_abs_pos(ad714x, idx);
 				ad714x_wheel_cal_flt_pos(ad714x, idx);
-
 				input_report_abs(sw->input, ABS_WHEEL,
-					sw->abs_pos);
+					sw->flt_pos);
 				input_report_key(sw->input, BTN_TOUCH, 1);
 			} else {
 				/* When the user lifts off the sensor, configure
···
 			input[alloc_idx]->id.bustype = bus_type;
 			input[alloc_idx]->id.product = ad714x->product;
 			input[alloc_idx]->id.version = ad714x->version;
+			input[alloc_idx]->name = "ad714x_captouch_slider";
+			input[alloc_idx]->dev.parent = dev;
 
 			error = input_register_device(input[alloc_idx]);
 			if (error)
···
 			input[alloc_idx]->id.bustype = bus_type;
 			input[alloc_idx]->id.product = ad714x->product;
 			input[alloc_idx]->id.version = ad714x->version;
+			input[alloc_idx]->name = "ad714x_captouch_wheel";
+			input[alloc_idx]->dev.parent = dev;
 
 			error = input_register_device(input[alloc_idx]);
 			if (error)
···
 			input[alloc_idx]->id.bustype = bus_type;
 			input[alloc_idx]->id.product = ad714x->product;
 			input[alloc_idx]->id.version = ad714x->version;
+			input[alloc_idx]->name = "ad714x_captouch_pad";
+			input[alloc_idx]->dev.parent = dev;
 
 			error = input_register_device(input[alloc_idx]);
 			if (error)
···
 		input[alloc_idx]->id.bustype = bus_type;
 		input[alloc_idx]->id.product = ad714x->product;
 		input[alloc_idx]->id.version = ad714x->version;
+		input[alloc_idx]->name = "ad714x_captouch_button";
+		input[alloc_idx]->dev.parent = dev;
 
 		error = input_register_device(input[alloc_idx]);
 		if (error)
···
 	}
 
 	error = request_threaded_irq(ad714x->irq, NULL, ad714x_interrupt_thread,
-			IRQF_TRIGGER_FALLING, "ad714x_captouch", ad714x);
+				plat_data->irqflags ?
+					plat_data->irqflags : IRQF_TRIGGER_FALLING,
+				"ad714x_captouch", ad714x);
 	if (error) {
 		dev_err(dev, "can't allocate irq %d\n", ad714x->irq);
 		goto err_unreg_dev;

drivers/input/misc/ati_remote2.c

···
 
 	mutex_lock(&ati_remote2_mutex);
 
-	if (mask != ar2->channel_mask && !ati_remote2_setup(ar2, mask))
-		ar2->channel_mask = mask;
+	if (mask != ar2->channel_mask) {
+		r = ati_remote2_setup(ar2, mask);
+		if (!r)
+			ar2->channel_mask = mask;
+	}
 
 	mutex_unlock(&ati_remote2_mutex);
 
 	usb_autopm_put_interface(ar2->intf[0]);
 
-	return count;
+	return r ? r : count;
 }
 
 static ssize_t ati_remote2_show_mode_mask(struct device *dev,

drivers/input/misc/rotary_encoder.c

···
  * rotary_encoder.c
  *
  * (c) 2009 Daniel Mack <[e-mail]>
+ * Copyright (C) 2011 Johan Hovold <[e-mail]>
  *
  * state machine code inspired by code from Tim Ruetz
  *
···
 
 	bool armed;
 	unsigned char dir;	/* 0 - clockwise, 1 - CCW */
+
+	char last_stable;
 };
+
+static int rotary_encoder_get_state(struct rotary_encoder_platform_data *pdata)
+{
+	int a = !!gpio_get_value(pdata->gpio_a);
+	int b = !!gpio_get_value(pdata->gpio_b);
+
+	a ^= pdata->inverted_a;
+	b ^= pdata->inverted_b;
+
+	return ((a << 1) | b);
+}
+
+static void rotary_encoder_report_event(struct rotary_encoder *encoder)
+{
+	struct rotary_encoder_platform_data *pdata = encoder->pdata;
+
+	if (pdata->relative_axis) {
+		input_report_rel(encoder->input,
+				 pdata->axis, encoder->dir ? -1 : 1);
+	} else {
+		unsigned int pos = encoder->pos;
+
+		if (encoder->dir) {
+			/* turning counter-clockwise */
+			if (pdata->rollover)
+				pos += pdata->steps;
+			if (pos)
+				pos--;
+		} else {
+			/* turning clockwise */
+			if (pdata->rollover || pos < pdata->steps)
+				pos++;
+		}
+
+		if (pdata->rollover)
+			pos %= pdata->steps;
+
+		encoder->pos = pos;
+		input_report_abs(encoder->input, pdata->axis, encoder->pos);
+	}
+
+	input_sync(encoder->input);
+}
 
 static irqreturn_t rotary_encoder_irq(int irq, void *dev_id)
 {
 	struct rotary_encoder *encoder = dev_id;
-	struct rotary_encoder_platform_data *pdata = encoder->pdata;
-	int a = !!gpio_get_value(pdata->gpio_a);
-	int b = !!gpio_get_value(pdata->gpio_b);
 	int state;
 
-	a ^= pdata->inverted_a;
-	b ^= pdata->inverted_b;
-	state = (a << 1) | b;
+	state = rotary_encoder_get_state(encoder->pdata);
 
 	switch (state) {
-
 	case 0x0:
-		if (!encoder->armed)
-			break;
-
-		if (pdata->relative_axis) {
-			input_report_rel(encoder->input, pdata->axis,
-					 encoder->dir ? -1 : 1);
-		} else {
-			unsigned int pos = encoder->pos;
-
-			if (encoder->dir) {
-				/* turning counter-clockwise */
-				if (pdata->rollover)
-					pos += pdata->steps;
-				if (pos)
-					pos--;
-			} else {
-				/* turning clockwise */
-				if (pdata->rollover || pos < pdata->steps)
-					pos++;
-			}
-			if (pdata->rollover)
-				pos %= pdata->steps;
-			encoder->pos = pos;
-			input_report_abs(encoder->input, pdata->axis,
-					 encoder->pos);
+		if (encoder->armed) {
+			rotary_encoder_report_event(encoder);
+			encoder->armed = false;
 		}
-		input_sync(encoder->input);
-
-		encoder->armed = false;
 		break;
 
 	case 0x1:
···
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t rotary_encoder_half_period_irq(int irq, void *dev_id)
+{
+	struct rotary_encoder *encoder = dev_id;
+	int state;
+
+	state = rotary_encoder_get_state(encoder->pdata);
+
+	switch (state) {
+	case 0x00:
+	case 0x03:
+		if (state != encoder->last_stable) {
+			rotary_encoder_report_event(encoder);
+			encoder->last_stable = state;
+		}
+		break;
+
+	case 0x01:
+	case 0x02:
+		encoder->dir = (encoder->last_stable + state) & 0x01;
+		break;
+	}
+
+	return IRQ_HANDLED;
+}
+
 static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 {
 	struct rotary_encoder_platform_data *pdata = pdev->dev.platform_data;
 	struct rotary_encoder *encoder;
 	struct input_dev *input;
+	irq_handler_t handler;
 	int err;
 
 	if (!pdata) {
···
 	}
 
 	/* request the IRQs */
-	err = request_irq(encoder->irq_a, &rotary_encoder_irq,
+	if (pdata->half_period) {
+		handler = &rotary_encoder_half_period_irq;
+		encoder->last_stable = rotary_encoder_get_state(pdata);
+	} else {
+		handler = &rotary_encoder_irq;
+	}
+
+	err = request_irq(encoder->irq_a, handler,
 			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 			  DRV_NAME, encoder);
 	if (err) {
···
 		goto exit_free_gpio_b;
 	}
 
-	err = request_irq(encoder->irq_b, &rotary_encoder_irq,
+	err = request_irq(encoder->irq_b, handler,
 			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 			  DRV_NAME, encoder);
 	if (err) {
···
 
 MODULE_ALIAS("platform:" DRV_NAME);
 MODULE_DESCRIPTION("GPIO rotary encoder driver");
-MODULE_AUTHOR("Daniel Mack <[e-mail]>");
+MODULE_AUTHOR("Daniel Mack <[e-mail]>, Johan Hovold");
 MODULE_LICENSE("GPL v2");
-

drivers/input/misc/twl4030-pwrbutton.c

···
 	return 0;
 
 free_irq:
-	free_irq(irq, NULL);
+	free_irq(irq, pwr);
 free_input_dev:
 	input_free_device(pwr);
 	return err;

drivers/input/mouse/elantech.c

···
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/input.h>
+#include <linux/input/mt.h>
 #include <linux/serio.h>
 #include <linux/libps2.h>
 #include "psmouse.h"
···
 	input_sync(dev);
 }
 
+static void elantech_set_slot(struct input_dev *dev, int slot, bool active,
+			      unsigned int x, unsigned int y)
+{
+	input_mt_slot(dev, slot);
+	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
+	if (active) {
+		input_report_abs(dev, ABS_MT_POSITION_X, x);
+		input_report_abs(dev, ABS_MT_POSITION_Y, y);
+	}
+}
+
+/* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */
+static void elantech_report_semi_mt_data(struct input_dev *dev,
+					 unsigned int num_fingers,
+					 unsigned int x1, unsigned int y1,
+					 unsigned int x2, unsigned int y2)
+{
+	elantech_set_slot(dev, 0, num_fingers != 0, x1, y1);
+	elantech_set_slot(dev, 1, num_fingers == 2, x2, y2);
+}
+
 /*
  * Interpret complete data packets and report absolute mode input events for
  * hardware version 2. (6 byte packets)
  */
 static void elantech_report_absolute_v2(struct psmouse *psmouse)
 {
+	struct elantech_data *etd = psmouse->private;
 	struct input_dev *dev = psmouse->dev;
 	unsigned char *packet = psmouse->packet;
-	int fingers, x1, y1, x2, y2;
+	unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0, width = 0, pres = 0;
 
 	/* byte 0: n1  n0   .   .   .   .   R   L */
 	fingers = (packet[0] & 0xc0) >> 6;
···
 		 * byte 1:  .   .   .   .   .  x10 x9  x8
 		 * byte 2: x7  x6  x5  x4  x4  x2  x1  x0
 		 */
-		input_report_abs(dev, ABS_X,
-			((packet[1] & 0x07) << 8) | packet[2]);
+		x1 = ((packet[1] & 0x07) << 8) | packet[2];
 		/*
 		 * byte 4:  .   .   .   .   .   .  y9  y8
 		 * byte 5: y7  y6  y5  y4  y3  y2  y1  y0
 		 */
-		input_report_abs(dev, ABS_Y,
-			ETP_YMAX_V2 - (((packet[4] & 0x03) << 8) | packet[5]));
+		y1 = ETP_YMAX_V2 - (((packet[4] & 0x03) << 8) | packet[5]);
+
+		input_report_abs(dev, ABS_X, x1);
+		input_report_abs(dev, ABS_Y, y1);
+
+		pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
+		width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
 		break;
 
 	case 2:
···
 		 */
 		input_report_abs(dev, ABS_X, x1 << 2);
 		input_report_abs(dev, ABS_Y, y1 << 2);
-		/*
-		 * For compatibility with the proprietary X Elantech driver
-		 * report both coordinates as hat coordinates
-		 */
-		input_report_abs(dev, ABS_HAT0X, x1);
-		input_report_abs(dev, ABS_HAT0Y, y1);
-		input_report_abs(dev, ABS_HAT1X, x2);
-		input_report_abs(dev, ABS_HAT1Y, y2);
+
+		/* Unknown so just report sensible values */
+		pres = 127;
+		width = 7;
 		break;
 	}
 
+	elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 	input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
 	input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
 	input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
 	input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4);
 	input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
 	input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+	if (etd->reports_pressure) {
+		input_report_abs(dev, ABS_PRESSURE, pres);
+		input_report_abs(dev, ABS_TOOL_WIDTH, width);
+	}
 
 	input_sync(dev);
 }
···
 		__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
 		input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
 		input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
-		input_set_abs_params(dev, ABS_HAT0X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
-		input_set_abs_params(dev, ABS_HAT0Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
-		input_set_abs_params(dev, ABS_HAT1X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
-		input_set_abs_params(dev, ABS_HAT1Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
+		if (etd->reports_pressure) {
+			input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
+					     ETP_PMAX_V2, 0, 0);
+			input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
+					     ETP_WMAX_V2, 0, 0);
+		}
+		__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
+		input_mt_init_slots(dev, 2);
+		input_set_abs_params(dev, ABS_MT_POSITION_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
+		input_set_abs_params(dev, ABS_MT_POSITION_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
 		break;
 	}
 }
···
 		etd->debug = 1;
 		/* Don't know how to do parity checking for version 2 */
 		etd->paritycheck = 0;
+
+		if (etd->fw_version >= 0x020800)
+			etd->reports_pressure = true;
+
 	} else {
 		etd->hw_version = 1;
 		etd->paritycheck = 1;

drivers/input/mouse/elantech.h

···
 #define ETP_YMIN_V2			(   0 + ETP_EDGE_FUZZ_V2)
 #define ETP_YMAX_V2			( 768 - ETP_EDGE_FUZZ_V2)
 
+#define ETP_PMIN_V2			0
+#define ETP_PMAX_V2			255
+#define ETP_WMIN_V2			0
+#define ETP_WMAX_V2			15
+
 /*
  * For two finger touches the coordinate of each finger gets reported
  * separately but with reduced resolution.
···
 	unsigned char capabilities;
 	bool paritycheck;
 	bool jumpy_cursor;
+	bool reports_pressure;
 	unsigned char hw_version;
 	unsigned int fw_version;
 	unsigned int single_finger_reports;

drivers/input/mousedev.c

···
 	spin_lock(&mousedev->client_lock);
 	list_add_tail_rcu(&client->node, &mousedev->client_list);
 	spin_unlock(&mousedev->client_lock);
-	synchronize_rcu();
 }
 
 static void mousedev_detach_client(struct mousedev *mousedev,

drivers/input/touchscreen/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called lpc32xx_ts.
 
+config TOUCHSCREEN_MAX11801
+	tristate "MAX11801 based touchscreens"
+	depends on I2C
+	help
+	  Say Y here if you have a MAX11801 based touchscreen
+	  controller.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called max11801_ts.
+
 config TOUCHSCREEN_MCS5000
 	tristate "MELFAS MCS-5000 touchscreen"
 	depends on I2C

drivers/input/touchscreen/Makefile

···
 obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
 obj-$(CONFIG_TOUCHSCREEN_INTEL_MID)	+= intel-mid-touch.o
 obj-$(CONFIG_TOUCHSCREEN_LPC32XX)	+= lpc32xx_ts.o
+obj-$(CONFIG_TOUCHSCREEN_MAX11801)	+= max11801_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MC13783)	+= mc13783_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MCS5000)	+= mcs5000_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MIGOR)		+= migor_ts.o

drivers/input/touchscreen/ads7846.c

···
 	u16			pressure_max;
 
 	bool			swap_xy;
+	bool			use_internal;
 
 	struct ads7846_packet	*packet;
 
···
 	struct ads7846 *ts = dev_get_drvdata(dev);
 	struct ser_req *req;
 	int status;
-	int use_internal;
 
 	req = kzalloc(sizeof *req, GFP_KERNEL);
 	if (!req)
···
 
 	spi_message_init(&req->msg);
 
-	/* FIXME boards with ads7846 might use external vref instead ... */
-	use_internal = (ts->model == 7846);
-
 	/* maybe turn on internal vREF, and let it settle */
-	if (use_internal) {
+	if (ts->use_internal) {
 		req->ref_on = REF_ON;
 		req->xfer[0].tx_buf = &req->ref_on;
 		req->xfer[0].len = 1;
···
 		/* for 1uF, settle for 800 usec; no cap, 100 usec.  */
 		req->xfer[1].delay_usecs = ts->vref_delay_usecs;
 		spi_message_add_tail(&req->xfer[1], &req->msg);
+
+		/* Enable reference voltage */
+		command |= ADS_PD10_REF_ON;
 	}
+
+	/* Enable ADC in every case */
+	command |= ADS_PD10_ADC_ON;
 
 	/* take sample */
 	req->command = (u8) command;
···
 { \
 	struct ads7846 *ts = dev_get_drvdata(dev); \
 	ssize_t v = ads7846_read12_ser(dev, \
-			READ_12BIT_SER(var) | ADS_PD10_ALL_ON); \
+			READ_12BIT_SER(var)); \
 	if (v < 0) \
 		return v; \
 	return sprintf(buf, "%u\n", adjust(ts, v)); \
···
 		if (!ts->vref_mv) {
 			dev_dbg(&spi->dev, "assuming 2.5V internal vREF\n");
 			ts->vref_mv = 2500;
+			ts->use_internal = true;
 		}
 		break;
 	case 7845:
···
 				pdata->gpio_pendown);
 			return err;
 		}
+		err = gpio_direction_input(pdata->gpio_pendown);
+		if (err) {
+			dev_err(&spi->dev, "failed to setup pendown GPIO%d\n",
+				pdata->gpio_pendown);
+			gpio_free(pdata->gpio_pendown);
+			return err;
+		}
 
 		ts->gpio_pendown = pdata->gpio_pendown;
 
···
 	if (ts->model == 7845)
 		ads7845_read12_ser(&spi->dev, PWRDOWN);
 	else
-		(void) ads7846_read12_ser(&spi->dev,
-				READ_12BIT_SER(vaux) | ADS_PD10_ALL_ON);
+		(void) ads7846_read12_ser(&spi->dev, READ_12BIT_SER(vaux));
 
 	err = sysfs_create_group(&spi->dev.kobj, &ads784x_attr_group);
 	if (err)

drivers/input/touchscreen/atmel_mxt_ts.c

···
 #include <linux/firmware.h>
 #include <linux/i2c.h>
 #include <linux/i2c/atmel_mxt_ts.h>
-#include <linux/input.h>
+#include <linux/input/mt.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
 
···
 #define MXT_PRESS		(1 << 6)
 #define MXT_DETECT		(1 << 7)
 
+/* Touch orient bits */
+#define MXT_XY_SWITCH		(1 << 0)
+#define MXT_X_INVERT		(1 << 1)
+#define MXT_Y_INVERT		(1 << 2)
+
 /* Touchscreen absolute values */
-#define MXT_MAX_XC		0x3ff
-#define MXT_MAX_YC		0x3ff
 #define MXT_MAX_AREA		0xff
 
 #define MXT_MAX_FINGER		10
···
 	struct mxt_info info;
 	struct mxt_finger finger[MXT_MAX_FINGER];
 	unsigned int irq;
+	unsigned int max_x;
+	unsigned int max_y;
 };
 
 static bool mxt_object_readable(unsigned int type)
···
 		if (!finger[id].status)
 			continue;
 
-		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
-				finger[id].status != MXT_RELEASE ?
-				finger[id].area : 0);
-		input_report_abs(input_dev, ABS_MT_POSITION_X,
-				finger[id].x);
-		input_report_abs(input_dev, ABS_MT_POSITION_Y,
-				finger[id].y);
-		input_mt_sync(input_dev);
+		input_mt_slot(input_dev, id);
+		input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
+				finger[id].status != MXT_RELEASE);
 
-		if (finger[id].status == MXT_RELEASE)
-			finger[id].status = 0;
-		else
+		if (finger[id].status != MXT_RELEASE) {
 			finger_num++;
+			input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
+					finger[id].area);
+			input_report_abs(input_dev, ABS_MT_POSITION_X,
+					finger[id].x);
+			input_report_abs(input_dev, ABS_MT_POSITION_Y,
+					finger[id].y);
+		} else {
+			finger[id].status = 0;
+		}
 	}
 
 	input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
···
 	if (!(status & (MXT_PRESS | MXT_MOVE)))
 		return;
 
-	x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6);
-	y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2);
+	x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
+	y = (message->message[2] << 4) | ((message->message[3] & 0xf));
+	if (data->max_x < 1024)
+		x = x >> 2;
+	if (data->max_y < 1024)
+		y = y >> 2;
+
 	area = message->message[4];
 
 	dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
···
 	if (error)
 		return error;
 
-	error = mxt_make_highchg(data);
-	if (error)
-		return error;
-
 	mxt_handle_pdata(data);
 
 	/* Backup to memory */
···
 			info->object_num);
 
 	return 0;
+}
+
+static void mxt_calc_resolution(struct mxt_data *data)
+{
+	unsigned int max_x = data->pdata->x_size - 1;
+	unsigned int max_y = data->pdata->y_size - 1;
+
+	if (data->pdata->orient & MXT_XY_SWITCH) {
+		data->max_x = max_y;
+		data->max_y = max_x;
+	} else {
+		data->max_x = max_x;
+		data->max_y = max_y;
+	}
 }
 
 static ssize_t mxt_object_show(struct device *dev,
···
 
 	enable_irq(data->irq);
 
+	error = mxt_make_highchg(data);
+	if (error)
+		return error;
+
 	return count;
 }
 
···
 	input_dev->open = mxt_input_open;
 	input_dev->close = mxt_input_close;
 
+	data->client = client;
+	data->input_dev = input_dev;
+	data->pdata = pdata;
+	data->irq = client->irq;
+
+	mxt_calc_resolution(data);
+
 	__set_bit(EV_ABS, input_dev->evbit);
 	__set_bit(EV_KEY, input_dev->evbit);
 	__set_bit(BTN_TOUCH, input_dev->keybit);
 
 	/* For single touch */
 	input_set_abs_params(input_dev, ABS_X,
-			     0, MXT_MAX_XC, 0, 0);
+			     0, data->max_x, 0, 0);
 	input_set_abs_params(input_dev, ABS_Y,
-			     0, MXT_MAX_YC, 0, 0);
+			     0, data->max_y, 0, 0);
 
 	/* For multi touch */
+	input_mt_init_slots(input_dev, MXT_MAX_FINGER);
 	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
 			     0, MXT_MAX_AREA, 0, 0);
 	input_set_abs_params(input_dev, ABS_MT_POSITION_X,
-			     0, MXT_MAX_XC, 0, 0);
+			     0, data->max_x, 0, 0);
 	input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
-			     0, MXT_MAX_YC, 0, 0);
+			     0, data->max_y, 0, 0);
 
 	input_set_drvdata(input_dev, data);
-
-	data->client = client;
-	data->input_dev = input_dev;
-	data->pdata = pdata;
-	data->irq = client->irq;
-
 	i2c_set_clientdata(client, data);
 
 	error = mxt_initialize(data);
···
 		dev_err(&client->dev, "Failed to register interrupt\n");
 		goto err_free_object;
 	}
+
+	error = mxt_make_highchg(data);
+	if (error)
+		goto err_free_irq;
 
 	error = input_register_device(input_dev);
 	if (error)

drivers/input/touchscreen/atmel_tsadcc.c

···
 err_release_mem:
 	release_mem_region(res->start, resource_size(res));
 err_free_dev:
-	input_free_device(ts_dev->input);
+	input_free_device(input_dev);
 err_free_mem:
 	kfree(ts_dev);
 	return err;

drivers/input/touchscreen/h3600_ts_input.c

···
 	set_GPIO_IRQ_edge(GPIO_BITSY_NPOWER_BUTTON, GPIO_RISING_EDGE);
 
 	if (request_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, action_button_handler,
-			IRQF_SHARED | IRQF_DISABLED, "h3600_action", &ts->dev)) {
+			IRQF_SHARED | IRQF_DISABLED, "h3600_action", ts->dev)) {
 		printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n");
 		err = -EBUSY;
 		goto fail1;
 	}
 
 	if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler,
-			IRQF_SHARED | IRQF_DISABLED, "h3600_suspend", &ts->dev)) {
+			IRQF_SHARED | IRQF_DISABLED, "h3600_suspend", ts->dev)) {
 		printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n");
 		err = -EBUSY;
 		goto fail2;
···
 {
 	struct h3600_dev *ts = serio_get_drvdata(serio);
 
-	free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev);
-	free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, &ts->dev);
+	free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev);
+	free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev);
 	input_get_device(ts->dev);
 	input_unregister_device(ts->dev);
 	serio_close(serio);

drivers/input/touchscreen/max11801_ts.c

···
+/*
+ * Driver for MAXI MAX11801 - A Resistive touch screen controller with
+ * i2c interface
+ *
+ * Copyright (C) 2011 Freescale Semiconductor, Inc.
+ * Author: Zhang Jiejing <[e-mail]>
+ *
+ * Based on mcs5000_ts.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ */
+
+/*
+ * This driver aims to support the series of MAXI touch chips max11801
+ * through max11803. The main difference between these 4 chips can be
+ * found in the table below:
+ * -----------------------------------------------------
+ * | CHIP     |  AUTO MODE SUPPORT(FIFO) | INTERFACE    |
+ * |----------------------------------------------------|
+ * | max11800 |  YES                     |   SPI        |
+ * | max11801 |  YES                     |   I2C        |
+ * | max11802 |  NO                      |   SPI        |
+ * | max11803 |  NO                      |   I2C        |
+ * ------------------------------------------------------
+ *
+ * Currently, this driver only supports max11801.
+ *
+ * Data Sheet:
+ * http://www.maxim-ic.com/datasheet/index.mvp/id/5943
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+
+/* Register Address define */
+#define GENERNAL_STATUS_REG		0x00
+#define GENERNAL_CONF_REG		0x01
+#define MESURE_RES_CONF_REG		0x02
+#define MESURE_AVER_CONF_REG		0x03
+#define ADC_SAMPLE_TIME_CONF_REG	0x04
+#define PANEL_SETUPTIME_CONF_REG	0x05
+#define DELAY_CONVERSION_CONF_REG	0x06
+#define TOUCH_DETECT_PULLUP_CONF_REG	0x07
+#define AUTO_MODE_TIME_CONF_REG		0x08 /* only for max11800/max11801 */
+#define APERTURE_CONF_REG		0x09 /* only for max11800/max11801 */
+#define AUX_MESURE_CONF_REG		0x0a
+#define OP_MODE_CONF_REG		0x0b
+
+/* FIFO is found only in max11800 and max11801 */
+#define FIFO_RD_CMD			(0x50 << 1)
+#define MAX11801_FIFO_INT		(1 << 2)
+#define MAX11801_FIFO_OVERFLOW		(1 << 3)
+
+#define XY_BUFSIZE			4
+#define XY_BUF_OFFSET			4
+
+#define MAX11801_MAX_X			0xfff
+#define MAX11801_MAX_Y			0xfff
+
+#define MEASURE_TAG_OFFSET		2
+#define MEASURE_TAG_MASK		(3 << MEASURE_TAG_OFFSET)
+#define EVENT_TAG_OFFSET		0
+#define EVENT_TAG_MASK			(3 << EVENT_TAG_OFFSET)
+#define MEASURE_X_TAG			(0 << MEASURE_TAG_OFFSET)
+#define MEASURE_Y_TAG			(1 << MEASURE_TAG_OFFSET)
+
+/* These are the state of touch event state machine */
+enum {
+	EVENT_INIT,
+	EVENT_MIDDLE,
+	EVENT_RELEASE,
+	EVENT_FIFO_END
+};
+
+struct max11801_data {
+	struct i2c_client		*client;
+	struct input_dev		*input_dev;
+};
+
+static u8 read_register(struct i2c_client *client, int addr)
+{
+	/* XXX: The chip ignores LSB of register address */
+	return i2c_smbus_read_byte_data(client, addr << 1);
+}
+
+static int max11801_write_reg(struct i2c_client *client, int addr, int data)
+{
+	/* XXX: The chip ignores LSB of register address */
+	return i2c_smbus_write_byte_data(client, addr << 1, data);
+}
+
+static irqreturn_t max11801_ts_interrupt(int irq, void *dev_id)
+{
+	struct max11801_data *data = dev_id;
+	struct i2c_client *client = data->client;
+	int status, i, ret;
+	u8 buf[XY_BUFSIZE];
+	int x = -1;
+	int y = -1;
+
+	status = read_register(data->client, GENERNAL_STATUS_REG);
+
+	if (status & (MAX11801_FIFO_INT | MAX11801_FIFO_OVERFLOW)) {
+		status = read_register(data->client, GENERNAL_STATUS_REG);
+
+		ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_CMD,
+						    XY_BUFSIZE, buf);
+
+		/*
+		 * We should get 4 bytes buffer that contains X,Y
+		 * and event tag
+		 */
+		if (ret < XY_BUFSIZE)
+			goto out;
+
+		for (i = 0; i < XY_BUFSIZE; i += XY_BUFSIZE / 2) {
+			if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_X_TAG)
+				x = (buf[i] << XY_BUF_OFFSET) +
+				    (buf[i + 1] >> XY_BUF_OFFSET);
+			else if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_Y_TAG)
+				y = (buf[i] << XY_BUF_OFFSET) +
+				    (buf[i + 1] >> XY_BUF_OFFSET);
+		}
+
+		if ((buf[1] & EVENT_TAG_MASK) != (buf[3] & EVENT_TAG_MASK))
+			goto out;
+
+		switch (buf[1] & EVENT_TAG_MASK) {
+		case EVENT_INIT:
+			/* fall through */
+		case EVENT_MIDDLE:
+			input_report_abs(data->input_dev, ABS_X, x);
+			input_report_abs(data->input_dev, ABS_Y, y);
+			input_event(data->input_dev, EV_KEY, BTN_TOUCH, 1);
+			input_sync(data->input_dev);
+			break;
+
+		case EVENT_RELEASE:
+			input_event(data->input_dev, EV_KEY, BTN_TOUCH, 0);
+			input_sync(data->input_dev);
+			break;
+
+		case EVENT_FIFO_END:
+			break;
+		}
+	}
+out:
+	return IRQ_HANDLED;
+}
+
+static void __devinit max11801_ts_phy_init(struct max11801_data *data)
+{
+	struct i2c_client *client = data->client;
+
+	/* Average X,Y, take 16 samples, average eight media sample */
+	max11801_write_reg(client, MESURE_AVER_CONF_REG, 0xff);
+	/* X,Y panel setup time set to 20us */
+	max11801_write_reg(client, PANEL_SETUPTIME_CONF_REG, 0x11);
+	/* Rough pullup time (2uS), Fine pullup time (10us)  */
+	max11801_write_reg(client, TOUCH_DETECT_PULLUP_CONF_REG, 0x10);
+	/* Auto mode init period = 5ms , scan period = 5ms*/
+	max11801_write_reg(client, AUTO_MODE_TIME_CONF_REG, 0xaa);
+	/* Aperture X,Y set to +- 4LSB */
+	max11801_write_reg(client, APERTURE_CONF_REG, 0x33);
+	/* Enable Power, enable Automode, enable Aperture, enable Average X,Y */
+	max11801_write_reg(client, OP_MODE_CONF_REG, 0x36);
+}
+
+static int __devinit max11801_ts_probe(struct i2c_client *client,
+				       const struct i2c_device_id *id)
+{
+	struct max11801_data *data;
+	struct input_dev *input_dev;
+	int error;
+
+	data = kzalloc(sizeof(struct max11801_data), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!data || !input_dev) {
+		dev_err(&client->dev, "Failed to allocate memory\n");
+		error = -ENOMEM;
+		goto err_free_mem;
+	}
+
+	data->client = client;
+	data->input_dev = input_dev;
+
+	input_dev->name = "max11801_ts";
+	input_dev->id.bustype = BUS_I2C;
+	input_dev->dev.parent = &client->dev;
+
+	__set_bit(EV_ABS, input_dev->evbit);
+	__set_bit(EV_KEY, input_dev->evbit);
+	__set_bit(BTN_TOUCH, input_dev->keybit);
+	input_set_abs_params(input_dev, ABS_X, 0, MAX11801_MAX_X, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0, MAX11801_MAX_Y, 0, 0);
+	input_set_drvdata(input_dev, data);
+
+	max11801_ts_phy_init(data);
+
+	error = request_threaded_irq(client->irq, NULL, max11801_ts_interrupt,
+				     IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+				     "max11801_ts", data);
+	if (error) {
+		dev_err(&client->dev, "Failed to register interrupt\n");
+		goto err_free_mem;
+	}
+
+	error = input_register_device(data->input_dev);
+	if (error)
+		goto err_free_irq;
+
+	i2c_set_clientdata(client, data);
+	return 0;
+
+err_free_irq:
+	free_irq(client->irq, data);
+err_free_mem:
+	input_free_device(input_dev);
+	kfree(data);
+	return error;
+}
+
+static __devexit int max11801_ts_remove(struct i2c_client *client)
+{
+	struct max11801_data *data = i2c_get_clientdata(client);
+
+	free_irq(client->irq, data);
+	input_unregister_device(data->input_dev);
+	kfree(data);
+
+	return 0;
+}
+
+static const struct i2c_device_id max11801_ts_id[] = {
+	{"max11801", 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max11801_ts_id);
+
+static struct i2c_driver max11801_ts_driver = {
+	.driver = {
+		.name	= "max11801_ts",
+		.owner	= THIS_MODULE,
+	},
+	.id_table	= max11801_ts_id,
+	.probe		= max11801_ts_probe,
+	.remove		= __devexit_p(max11801_ts_remove),
+};
+
+static int __init max11801_ts_init(void)
+{
+	return i2c_add_driver(&max11801_ts_driver);
+}
+
+static void __exit max11801_ts_exit(void)
+{
+	i2c_del_driver(&max11801_ts_driver);
+}
+
+module_init(max11801_ts_init);
+module_exit(max11801_ts_exit);
+
+MODULE_AUTHOR("Zhang Jiejing <[e-mail]>");
+MODULE_DESCRIPTION("Touchscreen driver for MAXI MAX11801 controller");
+MODULE_LICENSE("GPL");

drivers/input/touchscreen/tsc2007.c

···
 #include <linux/i2c.h>
 #include <linux/i2c/tsc2007.h>
 
-#define TS_POLL_DELAY			1 /* ms delay between samples */
-#define TS_POLL_PERIOD			1 /* ms delay between samples */
-
 #define TSC2007_MEASURE_TEMP0		(0x0 << 4)
 #define TSC2007_MEASURE_AUX		(0x2 << 4)
 #define TSC2007_MEASURE_TEMP1		(0x4 << 4)
···
 
 	u16			model;
 	u16			x_plate_ohms;
+	u16			max_rt;
+	unsigned long		poll_delay;
+	unsigned long		poll_period;
 
 	bool			pendown;
 	int			irq;
···
 {
 	struct tsc2007 *ts =
 		container_of(to_delayed_work(work), struct tsc2007, work);
+	bool debounced = false;
 	struct ts_event tc;
 	u32 rt;
 
···
 	tsc2007_read_values(ts, &tc);
 
 	rt = tsc2007_calculate_pressure(ts, &tc);
-	if (rt > MAX_12BIT) {
+	if (rt > ts->max_rt) {
 		/*
 		 * Sample found inconsistent by debouncing or pressure is
 		 * beyond the maximum. Don't report it to user space,
 		 * repeat at least once more the measurement.
 		 */
 		dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt);
+		debounced = true;
 		goto out;
 
 	}
···
 	}
 
  out:
-	if (ts->pendown)
+	if (ts->pendown || debounced)
 		schedule_delayed_work(&ts->work,
-				      msecs_to_jiffies(TS_POLL_PERIOD));
+				      msecs_to_jiffies(ts->poll_period));
 	else
 		enable_irq(ts->irq);
 }
···
 	if (!ts->get_pendown_state || likely(ts->get_pendown_state())) {
 		disable_irq_nosync(ts->irq);
 		schedule_delayed_work(&ts->work,
-				      msecs_to_jiffies(TS_POLL_DELAY));
+				      msecs_to_jiffies(ts->poll_delay));
 	}
 
 	if (ts->clear_penirq)
···
 
 	ts->model             = pdata->model;
 	ts->x_plate_ohms      = pdata->x_plate_ohms;
+	ts->max_rt            = pdata->max_rt ? : MAX_12BIT;
+	ts->poll_delay        = pdata->poll_delay ? : 1;
+	ts->poll_period       = pdata->poll_period ? : 1;
 	ts->get_pendown_state = pdata->get_pendown_state;
 	ts->clear_penirq      = pdata->clear_penirq;
 
···
 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 
-	input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, 0, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
-	input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT, 0, 0);
+	input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, pdata->fuzzx, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, pdata->fuzzy, 0);
+	input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT,
+			pdata->fuzzz, 0);
 
 	if (pdata->init_platform_hw)
 		pdata->init_platform_hw();

include/linux/gpio_keys.h

···
 
 struct gpio_keys_button {
 	/* Configuration parameters */
-	int code;		/* input event code (KEY_*, SW_*) */
+	unsigned int code;	/* input event code (KEY_*, SW_*) */
 	int gpio;
 	int active_low;
-	char *desc;
-	int type;		/* input event type (EV_KEY, EV_SW) */
+	const char *desc;
+	unsigned int type;	/* input event type (EV_KEY, EV_SW, EV_ABS) */
 	int wakeup;		/* configure the button as a wake-up source */
 	int debounce_interval;	/* debounce ticks interval in msecs */
 	bool can_disable;
+	int value;		/* axis value for EV_ABS */
 };
 
 struct gpio_keys_platform_data {
···
 	unsigned int rep:1;		/* enable input subsystem auto repeat */
 	int (*enable)(struct device *dev);
 	void (*disable)(struct device *dev);
+	const char *name;		/* input device name */
 };
 
 #endif

include/linux/i2c/mpr121_touchkey.h

···
+/* Header file for Freescale MPR121 Capacitive Touch Sensor */
+
+#ifndef _MPR121_TOUCHKEY_H
+#define _MPR121_TOUCHKEY_H
+
+/**
+ * struct mpr121_platform_data - platform data for mpr121 sensor
+ * @keymap: pointer to array of KEY_* values representing keymap
+ * @keymap_size: size of the keymap
+ * @wakeup: configure the button as a wake-up source
+ * @vdd_uv: VDD voltage in uV
+ */
+struct mpr121_platform_data {
+	const unsigned short *keymap;
+	unsigned int keymap_size;
+	bool wakeup;
+	int vdd_uv;
+};
+
+#endif /* _MPR121_TOUCHKEY_H */

include/linux/i2c/tsc2007.h

···
 struct tsc2007_platform_data {
 	u16	model;				/* 2007. */
 	u16	x_plate_ohms;
+	u16	max_rt; /* max. resistance above which samples are ignored */
+	unsigned long poll_delay; /* delay (in ms) after pen-down event
+				     before polling starts */
+	unsigned long poll_period; /* time (in ms) between samples */
+	int	fuzzx; /* fuzz factor for X, Y and pressure axes */
+	int	fuzzy;
+	int	fuzzz;
 
 	int	(*get_pendown_state)(void);
 	void	(*clear_penirq)(void);		/* If needed, clear 2nd level

include/linux/input/ad714x.h

···
  * The platform_data for the device's "struct device" holds this
  * information.
  *
- * Copyright 2009 Analog Devices Inc.
+ * Copyright 2009-2011 Analog Devices Inc.
  *
  * Licensed under the GPL-2 or later.
  */
···
 	struct ad714x_button_plat *button;
 	unsigned short stage_cfg_reg[STAGE_NUM][STAGE_CFGREG_NUM];
 	unsigned short sys_cfg_reg[SYS_CFGREG_NUM];
+	unsigned long irqflags;
 };
 
 #endif

include/linux/input/adp5589.h

···
+/*
+ * Analog Devices ADP5589 I/O Expander and QWERTY Keypad Controller
+ *
+ * Copyright 2010-2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef _ADP5589_H
+#define _ADP5589_H
+
+#define ADP5589_ID			0x00
+#define ADP5589_INT_STATUS		0x01
+#define ADP5589_STATUS			0x02
+#define ADP5589_FIFO_1			0x03
+#define ADP5589_FIFO_2			0x04
+#define ADP5589_FIFO_3			0x05
+#define ADP5589_FIFO_4			0x06
+#define ADP5589_FIFO_5			0x07
+#define ADP5589_FIFO_6			0x08
+#define ADP5589_FIFO_7			0x09
+#define ADP5589_FIFO_8			0x0A
+#define ADP5589_FIFO_9			0x0B
+#define ADP5589_FIFO_10			0x0C
+#define ADP5589_FIFO_11			0x0D
+#define ADP5589_FIFO_12			0x0E
+#define ADP5589_FIFO_13			0x0F
+#define ADP5589_FIFO_14			0x10
+#define ADP5589_FIFO_15			0x11
+#define ADP5589_FIFO_16			0x12
+#define ADP5589_GPI_INT_STAT_A		0x13
+#define ADP5589_GPI_INT_STAT_B		0x14
+#define ADP5589_GPI_INT_STAT_C		0x15
+#define ADP5589_GPI_STATUS_A		0x16
+#define ADP5589_GPI_STATUS_B		0x17
+#define ADP5589_GPI_STATUS_C		0x18
+#define ADP5589_RPULL_CONFIG_A		0x19
+#define ADP5589_RPULL_CONFIG_B		0x1A
+#define ADP5589_RPULL_CONFIG_C		0x1B
+#define ADP5589_RPULL_CONFIG_D		0x1C
+#define ADP5589_RPULL_CONFIG_E		0x1D
+#define ADP5589_GPI_INT_LEVEL_A		0x1E
+#define ADP5589_GPI_INT_LEVEL_B		0x1F
+#define ADP5589_GPI_INT_LEVEL_C		0x20
+#define ADP5589_GPI_EVENT_EN_A		0x21
+#define ADP5589_GPI_EVENT_EN_B		0x22
+#define ADP5589_GPI_EVENT_EN_C		0x23
+#define ADP5589_GPI_INTERRUPT_EN_A	0x24
+#define ADP5589_GPI_INTERRUPT_EN_B	0x25
+#define ADP5589_GPI_INTERRUPT_EN_C	0x26
+#define ADP5589_DEBOUNCE_DIS_A		0x27
+#define ADP5589_DEBOUNCE_DIS_B		0x28
+#define ADP5589_DEBOUNCE_DIS_C		0x29
+#define ADP5589_GPO_DATA_OUT_A		0x2A
+#define ADP5589_GPO_DATA_OUT_B		0x2B
+#define ADP5589_GPO_DATA_OUT_C		0x2C
+#define ADP5589_GPO_OUT_MODE_A		0x2D
+#define ADP5589_GPO_OUT_MODE_B		0x2E
+#define ADP5589_GPO_OUT_MODE_C		0x2F
+#define ADP5589_GPIO_DIRECTION_A	0x30
+#define ADP5589_GPIO_DIRECTION_B	0x31
+#define ADP5589_GPIO_DIRECTION_C	0x32
+#define ADP5589_UNLOCK1			0x33
+#define ADP5589_UNLOCK2			0x34
+#define ADP5589_EXT_LOCK_EVENT		0x35
+#define ADP5589_UNLOCK_TIMERS		0x36
+#define ADP5589_LOCK_CFG		0x37
+#define ADP5589_RESET1_EVENT_A		0x38
+#define ADP5589_RESET1_EVENT_B		0x39
+#define ADP5589_RESET1_EVENT_C		0x3A
+#define ADP5589_RESET2_EVENT_A		0x3B
+#define ADP5589_RESET2_EVENT_B		0x3C
+#define ADP5589_RESET_CFG		0x3D
+#define ADP5589_PWM_OFFT_LOW		0x3E
+#define ADP5589_PWM_OFFT_HIGH		0x3F
+#define ADP5589_PWM_ONT_LOW		0x40
+#define ADP5589_PWM_ONT_HIGH		0x41
+#define ADP5589_PWM_CFG			0x42
+#define ADP5589_CLOCK_DIV_CFG		0x43
+#define ADP5589_LOGIC_1_CFG		0x44
+#define ADP5589_LOGIC_2_CFG		0x45
+#define ADP5589_LOGIC_FF_CFG		0x46
+#define ADP5589_LOGIC_INT_EVENT_EN	0x47
+#define ADP5589_POLL_PTIME_CFG		0x48
+#define ADP5589_PIN_CONFIG_A		0x49
+#define ADP5589_PIN_CONFIG_B		0x4A
+#define ADP5589_PIN_CONFIG_C		0x4B
+#define ADP5589_PIN_CONFIG_D		0x4C
+#define ADP5589_GENERAL_CFG		0x4D
+#define ADP5589_INT_EN			0x4E
+
+#define ADP5589_DEVICE_ID_MASK	0xF
+
+/* Put one of these structures in i2c_board_info platform_data */
+
+#define ADP5589_KEYMAPSIZE	88
+
+#define ADP5589_GPI_PIN_ROW0 97
+#define ADP5589_GPI_PIN_ROW1 98
+#define ADP5589_GPI_PIN_ROW2 99
+#define ADP5589_GPI_PIN_ROW3 100
+#define ADP5589_GPI_PIN_ROW4 101
+#define ADP5589_GPI_PIN_ROW5 102
+#define ADP5589_GPI_PIN_ROW6 103
+#define ADP5589_GPI_PIN_ROW7 104
+#define ADP5589_GPI_PIN_COL0 105
+#define ADP5589_GPI_PIN_COL1 106
+#define ADP5589_GPI_PIN_COL2 107
+#define ADP5589_GPI_PIN_COL3 108
+#define ADP5589_GPI_PIN_COL4 109
+#define ADP5589_GPI_PIN_COL5 110
+#define ADP5589_GPI_PIN_COL6 111
+#define ADP5589_GPI_PIN_COL7 112
+#define ADP5589_GPI_PIN_COL8 113
+#define ADP5589_GPI_PIN_COL9 114
+#define ADP5589_GPI_PIN_COL10 115
+#define GPI_LOGIC1 116
+#define GPI_LOGIC2 117
+
+#define ADP5589_GPI_PIN_ROW_BASE ADP5589_GPI_PIN_ROW0
+#define ADP5589_GPI_PIN_ROW_END ADP5589_GPI_PIN_ROW7
+#define ADP5589_GPI_PIN_COL_BASE ADP5589_GPI_PIN_COL0
+#define ADP5589_GPI_PIN_COL_END ADP5589_GPI_PIN_COL10
+
+#define ADP5589_GPI_PIN_BASE ADP5589_GPI_PIN_ROW_BASE
+#define ADP5589_GPI_PIN_END ADP5589_GPI_PIN_COL_END
+
+#define ADP5589_GPIMAPSIZE_MAX (ADP5589_GPI_PIN_END - ADP5589_GPI_PIN_BASE + 1)
+
+struct adp5589_gpi_map {
+	unsigned short pin;
+	unsigned short sw_evt;
+};
+
+/* scan_cycle_time */
+#define ADP5589_SCAN_CYCLE_10ms		0
+#define ADP5589_SCAN_CYCLE_20ms		1
+#define ADP5589_SCAN_CYCLE_30ms		2
+#define ADP5589_SCAN_CYCLE_40ms		3
+
+/* RESET_CFG */
+#define RESET_PULSE_WIDTH_500us		0
+#define RESET_PULSE_WIDTH_1ms		1
+#define RESET_PULSE_WIDTH_2ms		2
+#define RESET_PULSE_WIDTH_10ms		3
+
+#define RESET_TRIG_TIME_0ms		(0 << 2)
+#define RESET_TRIG_TIME_1000ms		(1 << 2)
+#define RESET_TRIG_TIME_1500ms		(2 << 2)
+#define RESET_TRIG_TIME_2000ms		(3 << 2)
+#define RESET_TRIG_TIME_2500ms		(4 << 2)
+#define RESET_TRIG_TIME_3000ms		(5 << 2)
+#define RESET_TRIG_TIME_3500ms		(6 << 2)
+#define RESET_TRIG_TIME_4000ms		(7 << 2)
+
+#define RESET_PASSTHRU_EN		(1 << 5)
+#define RESET1_POL_HIGH			(1 << 6)
+#define RESET1_POL_LOW			(0 << 6)
+#define RESET2_POL_HIGH			(1 << 7)
+#define RESET2_POL_LOW			(0 << 7)
+
+/* Mask Bits:
+ * C C C C C C C C C C C | R R R R R R R R
+ * 1 9 8 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0
+ * 0
+ * ---------------- BIT ------------------
+ * 1 1 1 1 1 1 1 1 1 0 0 | 0 0 0 0 0 0 0 0
+ * 8 7 6 5 4 3 2 1 0 9 8 | 7 6 5 4 3 2 1 0
+ */
+
+#define ADP_ROW(x)			(1 << (x))
+#define ADP_COL(x)			(1 << (x + 8))
+
+struct adp5589_kpad_platform_data {
+	unsigned keypad_en_mask;	/* Keypad (Rows/Columns) enable mask */
+	const unsigned short *keymap;	/* Pointer to keymap */
+	unsigned short keymapsize;	/* Keymap size */
+	bool repeat;			/* Enable key repeat */
+	bool en_keylock;		/* Enable key lock feature */
+	unsigned char unlock_key1;	/* Unlock Key 1 */
+	unsigned char unlock_key2;	/* Unlock Key 2 */
+	unsigned char unlock_timer;	/* Time in seconds [0..7] between the two unlock keys 0=disable */
+	unsigned char scan_cycle_time;	/* Time between consecutive scan cycles */
+	unsigned char reset_cfg;	/* Reset config */
+	unsigned short reset1_key_1;	/* Reset Key 1 */
+	unsigned short reset1_key_2;	/* Reset Key 2 */
+	unsigned short reset1_key_3;	/* Reset Key 3 */
+	unsigned short reset2_key_1;	/* Reset Key 1 */
+	unsigned short reset2_key_2;	/* Reset Key 2 */
+	unsigned debounce_dis_mask;	/* Disable debounce mask */
+	unsigned pull_dis_mask;		/* Disable all pull resistors mask */
+	unsigned pullup_en_100k;	/* Pull-Up 100k Enable Mask */
+	unsigned pullup_en_300k;	/* Pull-Up 300k Enable Mask */
+	unsigned pulldown_en_300k;	/* Pull-Down 300k Enable Mask */
+	const struct adp5589_gpi_map *gpimap;
+	unsigned short gpimapsize;
+	const struct adp5589_gpio_platform_data *gpio_data;
+};
+
+struct i2c_client; /* forward declaration */
+
+struct adp5589_gpio_platform_data {
+	int	gpio_start;	/* GPIO Chip base # */
+	int	(*setup)(struct i2c_client *client,
+				int gpio, unsigned ngpio,
+				void *context);
+	int	(*teardown)(struct i2c_client *client,
+				int gpio, unsigned ngpio,
+				void *context);
+	void	*context;
+};
+
+#endif

include/linux/rotary_encoder.h

···
 	unsigned int inverted_b;
 	bool relative_axis;
 	bool rollover;
+	bool half_period;
 };
 
 #endif /* __ROTARY_ENCODER_H__ */

include/linux/spi/ads7846.h

···
 struct ads7846_platform_data {
 	u16	model;			/* 7843, 7845, 7846, 7873. */
 	u16	vref_delay_usecs;	/* 0 for external vref; etc */
-	u16	vref_mv;		/* external vref value, milliVolts */
+	u16	vref_mv;		/* external vref value, milliVolts
+					 * ads7846: if 0, use internal vref */
 	bool	keep_vref_on;		/* set to keep vref on for differential
 					 * measurements as well */
 	bool	swap_xy;		/* swap x and y axes */