Merge tag 'for-linus-2022121301' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid

Pull HID updates from Jiri Kosina:

- iio support for the MCP2221 HID driver (Matt Ranostay)

- support for more than one hinge sensor in hid-sensor-custom (Yauhen
Kharuzhy)

- PS DualShock 4 controller support (Roderick Colenbrander)

- XP-PEN Deco LW support (José Expósito)

- other assorted code cleanups and device ID/quirk addtions

* tag 'for-linus-2022121301' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: (51 commits)
HID: logitech HID++: Send SwID in GetProtocolVersion
HID: hid-elan: use default remove for hid device
HID: hid-alps: use default remove for hid device
HID: hid-sensor-custom: set fixed size for custom attributes
HID: i2c: let RMI devices decide what constitutes wakeup event
HID: playstation: fix DualShock4 bluetooth CRC endian issue.
HID: playstation: fix DualShock4 bluetooth memory corruption bug.
HID: apple: Swap Control and Command keys on Apple keyboards
HID: intel-ish-hid: ishtp: remove variable rb_count
HID: uclogic: Standardize test name prefix
HID: hid-sensor-custom: Allow more than one hinge angle sensor
HID: ft260: fix 'cast to restricted' kernel CI bot warnings
HID: ft260: missed NACK from busy device
HID: ft260: fix a NULL pointer dereference in ft260_i2c_write
HID: ft260: wake up device from power saving mode
HID: ft260: missed NACK from big i2c read
HID: ft260: remove SMBus Quick command support
HID: ft260: skip unexpected HID input reports
HID: ft260: do not populate /dev/hidraw device
HID: ft260: improve i2c large reads performance
...

drivers/hid/Kconfig

···
 config HID_MCP2221
 	tristate "Microchip MCP2221 HID USB-to-I2C/SMbus host support"
 	depends on USB_HID && I2C
-	depends on GPIOLIB
+	imply GPIOLIB
+	imply IIO
 	help
 	Provides I2C and SMBUS host adapter functionality over USB-HID
 	through MCP2221 device.

drivers/hid/hid-alps.c

···
 	return 0;
 }
 
-static void alps_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-}
-
 static const struct hid_device_id alps_id[] = {
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
···
 	.name = "hid-alps",
 	.id_table		= alps_id,
 	.probe			= alps_probe,
-	.remove			= alps_remove,
 	.raw_event		= alps_raw_event,
 	.input_mapping		= alps_input_mapping,
 	.input_configured	= alps_input_configured,

drivers/hid/hid-apple.c

···
 		"(For people who want to keep Windows PC keyboard muscle memory. "
 		"[0] = as-is, Mac layout. 1 = swapped, Windows layout.)");
 
+static unsigned int swap_ctrl_cmd;
+module_param(swap_ctrl_cmd, uint, 0644);
+MODULE_PARM_DESC(swap_ctrl_cmd, "Swap the Control (\"Ctrl\") and Command (\"Flag\") keys. "
+		"(For people who are used to Mac shortcuts involving Command instead of Control. "
+		"[0] = No change. 1 = Swapped.)");
+
 static unsigned int swap_fn_leftctrl;
 module_param(swap_fn_leftctrl, uint, 0644);
 MODULE_PARM_DESC(swap_fn_leftctrl, "Swap the Fn and left Control keys. "
···
 	{ KEY_LEFTALT,	KEY_LEFTMETA },
 	{ KEY_LEFTMETA,	KEY_LEFTALT },
 	{ KEY_RIGHTALT,	KEY_RIGHTMETA },
-	{ KEY_RIGHTMETA,KEY_RIGHTALT },
+	{ KEY_RIGHTMETA, KEY_RIGHTALT },
+	{ }
+};
+
+static const struct apple_key_translation swapped_ctrl_cmd_keys[] = {
+	{ KEY_LEFTCTRL,	KEY_LEFTMETA },
+	{ KEY_LEFTMETA,	KEY_LEFTCTRL },
+	{ KEY_RIGHTCTRL, KEY_RIGHTMETA },
+	{ KEY_RIGHTMETA, KEY_RIGHTCTRL },
 	{ }
 };
 
 static const struct apple_key_translation swapped_fn_leftctrl_keys[] = {
 	{ KEY_FN, KEY_LEFTCTRL },
+	{ KEY_LEFTCTRL, KEY_FN },
 	{ }
 };
 
···
 	struct apple_sc *asc = hid_get_drvdata(hid);
 	const struct apple_key_translation *trans, *table;
 	bool do_translate;
-	u16 code = 0;
+	u16 code = usage->code;
 	unsigned int real_fnmode;
-
-	u16 fn_keycode = (swap_fn_leftctrl) ? (KEY_LEFTCTRL) : (KEY_FN);
-
-	if (usage->code == fn_keycode) {
-		asc->fn_on = !!value;
-		input_event_with_scancode(input, usage->type, KEY_FN,
-				usage->hid, value);
-		return 1;
-	}
 
 	if (fnmode == 3) {
 		real_fnmode = (asc->quirks & APPLE_IS_NON_APPLE) ? 2 : 1;
 	} else {
 		real_fnmode = fnmode;
 	}
+
+	if (swap_fn_leftctrl) {
+		trans = apple_find_translation(swapped_fn_leftctrl_keys, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (iso_layout > 0 || (iso_layout < 0 && (asc->quirks & APPLE_ISO_TILDE_QUIRK) &&
+			hid->country == HID_COUNTRY_INTERNATIONAL_ISO)) {
+		trans = apple_find_translation(apple_iso_keyboard, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (swap_opt_cmd) {
+		trans = apple_find_translation(swapped_option_cmd_keys, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (swap_ctrl_cmd) {
+		trans = apple_find_translation(swapped_ctrl_cmd_keys, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (code == KEY_FN)
+		asc->fn_on = !!value;
 
 	if (real_fnmode) {
 		if (hid->product == USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI ||
···
 		else
 			table = apple_fn_keys;
 
-		trans = apple_find_translation (table, usage->code);
+		trans = apple_find_translation(table, code);
 
 		if (trans) {
-			if (test_bit(trans->from, input->key))
+			bool from_is_set = test_bit(trans->from, input->key);
+			bool to_is_set = test_bit(trans->to, input->key);
+
+			if (from_is_set)
 				code = trans->from;
-			else if (test_bit(trans->to, input->key))
+			else if (to_is_set)
 				code = trans->to;
 
-			if (!code) {
+			if (!(from_is_set || to_is_set)) {
 				if (trans->flags & APPLE_FLAG_FKEY) {
 					switch (real_fnmode) {
 					case 1:
···
 					do_translate = asc->fn_on;
 				}
 
-				code = do_translate ? trans->to : trans->from;
+				if (do_translate)
+					code = trans->to;
 			}
-
-			input_event_with_scancode(input, usage->type, code,
-					usage->hid, value);
-			return 1;
 		}
 
 		if (asc->quirks & APPLE_NUMLOCK_EMULATION &&
-				(test_bit(usage->code, asc->pressed_numlock) ||
+				(test_bit(code, asc->pressed_numlock) ||
 				test_bit(LED_NUML, input->led))) {
-			trans = apple_find_translation(powerbook_numlock_keys,
-					usage->code);
+			trans = apple_find_translation(powerbook_numlock_keys, code);
 
 			if (trans) {
 				if (value)
-					set_bit(usage->code,
-							asc->pressed_numlock);
+					set_bit(code, asc->pressed_numlock);
 				else
-					clear_bit(usage->code,
-							asc->pressed_numlock);
+					clear_bit(code, asc->pressed_numlock);
 
-				input_event_with_scancode(input, usage->type,
-						trans->to, usage->hid, value);
+				code = trans->to;
 			}
-
-			return 1;
 		}
 	}
 
-	if (iso_layout > 0 || (iso_layout < 0 && (asc->quirks & APPLE_ISO_TILDE_QUIRK) &&
-			hid->country == HID_COUNTRY_INTERNATIONAL_ISO)) {
-		trans = apple_find_translation(apple_iso_keyboard, usage->code);
-		if (trans) {
-			input_event_with_scancode(input, usage->type,
-					trans->to, usage->hid, value);
-			return 1;
-		}
-	}
+	if (usage->code != code) {
+		input_event_with_scancode(input, usage->type, code, usage->hid, value);
 
-	if (swap_opt_cmd) {
-		trans = apple_find_translation(swapped_option_cmd_keys, usage->code);
-		if (trans) {
-			input_event_with_scancode(input, usage->type,
-					trans->to, usage->hid, value);
-			return 1;
-		}
-	}
-
-	if (swap_fn_leftctrl) {
-		trans = apple_find_translation(swapped_fn_leftctrl_keys, usage->code);
-		if (trans) {
-			input_event_with_scancode(input, usage->type,
-					trans->to, usage->hid, value);
-			return 1;
-		}
+		return 1;
 	}
 
 	return 0;
···
 	apple_setup_key_translation(input, apple2021_fn_keys);
 	apple_setup_key_translation(input, macbookpro_no_esc_fn_keys);
 	apple_setup_key_translation(input, macbookpro_dedicated_esc_fn_keys);
-
-	if (swap_fn_leftctrl)
-		apple_setup_key_translation(input, swapped_fn_leftctrl_keys);
 }
 
 static int apple_input_mapping(struct hid_device *hdev, struct hid_input *hi,
···
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING9_JIS),
 		.driver_data = APPLE_HAS_FN | APPLE_RDESC_JIS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J140K),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J132),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J680),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J213),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J214K),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J223),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J230K),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J152F),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 		.driver_data = APPLE_NUMLOCK_EMULATION | APPLE_HAS_FN },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),

drivers/hid/hid-elan.c

···
 	return ret;
 }
 
-static void elan_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-}
-
 static const struct hid_device_id elan_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_HP_X2),
 	  .driver_data = ELAN_HAS_LED },
···
 	.input_configured = elan_input_configured,
 	.raw_event = elan_raw_event,
 	.probe = elan_probe,
-	.remove = elan_remove,
 };
 
 module_hid_driver(elan_driver);

drivers/hid/hid-ft260.c

···
 
 #define FT260_REPORT_MAX_LENGTH (64)
 #define FT260_I2C_DATA_REPORT_ID(len) (FT260_I2C_REPORT_MIN + (len - 1) / 4)
+
+#define FT260_WAKEUP_NEEDED_AFTER_MS (4800) /* 5s minus 200ms margin */
+
 /*
- * The input report format assigns 62 bytes for the data payload, but ft260
- * returns 60 and 2 in two separate transactions. To minimize transfer time
- * in reading chunks mode, set the maximum read payload length to 60 bytes.
- */
-#define FT260_RD_DATA_MAX (60)
+ * The ft260 input report format defines 62 bytes for the data payload, but
+ * when requested 62 bytes, the controller returns 60 and 2 in separate input
+ * reports. To achieve better performance with the multi-report read data
+ * transfers, we set the maximum read payload length to a multiple of 60.
+ * With a 100 kHz I2C clock, one 240 bytes read takes about 1/27 second,
+ * which is excessive; On the other hand, some higher layer drivers like at24
+ * or optoe limit the i2c reads to 128 bytes. To not block other drivers out
+ * of I2C for potentially troublesome amounts of time, we select the maximum
+ * read payload length to be 180 bytes.
+*/
+#define FT260_RD_DATA_MAX (180)
 #define FT260_WR_DATA_MAX (60)
 
 /*
···
 	struct completion wait;
 	struct mutex lock;
 	u8 write_buf[FT260_REPORT_MAX_LENGTH];
+	unsigned long need_wakeup_at;
 	u8 *read_buf;
 	u16 read_idx;
 	u16 read_len;
···
 	return ret;
 }
 
-static int ft260_xfer_status(struct ft260_device *dev)
+static int ft260_xfer_status(struct ft260_device *dev, u8 bus_busy)
 {
 	struct hid_device *hdev = dev->hdev;
 	struct ft260_get_i2c_status_report report;
 	int ret;
+
+	if (time_is_before_jiffies(dev->need_wakeup_at)) {
+		ret = ft260_hid_feature_report_get(hdev, FT260_I2C_STATUS,
+						(u8 *)&report, sizeof(report));
+		if (unlikely(ret < 0)) {
+			hid_err(hdev, "failed to retrieve status: %d, no wakeup\n",
+				ret);
+		} else {
+			dev->need_wakeup_at = jiffies +
+				msecs_to_jiffies(FT260_WAKEUP_NEEDED_AFTER_MS);
+			ft260_dbg("bus_status %#02x, wakeup\n",
+				  report.bus_status);
+		}
+	}
 
 	ret = ft260_hid_feature_report_get(hdev, FT260_I2C_STATUS,
 					   (u8 *)&report, sizeof(report));
···
 	ft260_dbg("bus_status %#02x, clock %u\n", report.bus_status,
 		  dev->clock);
 
-	if (report.bus_status & FT260_I2C_STATUS_CTRL_BUSY)
+	if (report.bus_status & (FT260_I2C_STATUS_CTRL_BUSY | bus_busy))
 		return -EAGAIN;
 
-	if (report.bus_status & FT260_I2C_STATUS_BUS_BUSY)
-		return -EBUSY;
-
-	if (report.bus_status & FT260_I2C_STATUS_ERROR)
+	/*
+	 * The error condition (bit 1) is a status bit reflecting any
+	 * error conditions. When any of the bits 2, 3, or 4 are raised
+	 * to 1, bit 1 is also set to 1.
+	 */
+	if (report.bus_status & FT260_I2C_STATUS_ERROR) {
+		hid_err(hdev, "i2c bus error: %#02x\n", report.bus_status);
 		return -EIO;
+	}
 
-	ret = -EIO;
-
-	if (report.bus_status & FT260_I2C_STATUS_ADDR_NO_ACK)
-		ft260_dbg("unacknowledged address\n");
-
-	if (report.bus_status & FT260_I2C_STATUS_DATA_NO_ACK)
-		ft260_dbg("unacknowledged data\n");
-
-	if (report.bus_status & FT260_I2C_STATUS_ARBITR_LOST)
-		ft260_dbg("arbitration loss\n");
-
-	if (report.bus_status & FT260_I2C_STATUS_CTRL_IDLE)
-		ret = 0;
-
-	return ret;
+	return 0;
 }
 
 static int ft260_hid_output_report(struct hid_device *hdev, u8 *data,
···
 static int ft260_hid_output_report_check_status(struct ft260_device *dev,
 						u8 *data, int len)
 {
-	int ret, usec, try = 3;
+	u8 bus_busy;
+	int ret, usec, try = 100;
 	struct hid_device *hdev = dev->hdev;
+	struct ft260_i2c_write_request_report *rep =
+		(struct ft260_i2c_write_request_report *)data;
 
 	ret = ft260_hid_output_report(hdev, data, len);
 	if (ret < 0) {
···
 		return ret;
 	}
 
-	/* transfer time = 1 / clock(KHz) * 10 bits * bytes */
-	usec = 10000 / dev->clock * len;
-	usleep_range(usec, usec + 100);
-	ft260_dbg("wait %d usec, len %d\n", usec, len);
+	/* transfer time = 1 / clock(KHz) * 9 bits * bytes */
+	usec = len * 9000 / dev->clock;
+	if (usec > 2000) {
+		usec -= 1500;
+		usleep_range(usec, usec + 100);
+		ft260_dbg("wait %d usec, len %d\n", usec, len);
+	}
+
+	/*
+	 * Do not check the busy bit for combined transactions
+	 * since the controller keeps the bus busy between writing
+	 * and reading IOs to ensure an atomic operation.
+	 */
+	if (rep->flag == FT260_FLAG_START)
+		bus_busy = 0;
+	else
+		bus_busy = FT260_I2C_STATUS_BUS_BUSY;
+
 	do {
-		ret = ft260_xfer_status(dev);
+		ret = ft260_xfer_status(dev, bus_busy);
 		if (ret != -EAGAIN)
 			break;
 	} while (--try);
 
-	if (ret == 0 || ret == -EBUSY)
+	if (ret == 0)
 		return 0;
 
 	ft260_i2c_reset(hdev);
···
 }
 
 static int ft260_i2c_write(struct ft260_device *dev, u8 addr, u8 *data,
-			   int data_len, u8 flag)
+			   int len, u8 flag)
 {
-	int len, ret, idx = 0;
+	int ret, wr_len, idx = 0;
 	struct hid_device *hdev = dev->hdev;
 	struct ft260_i2c_write_request_report *rep =
 		(struct ft260_i2c_write_request_report *)dev->write_buf;
 
+	if (len < 1)
+		return -EINVAL;
+
+	rep->flag = FT260_FLAG_START;
+
 	do {
-		if (data_len <= FT260_WR_DATA_MAX)
-			len = data_len;
-		else
-			len = FT260_WR_DATA_MAX;
+		if (len <= FT260_WR_DATA_MAX) {
+			wr_len = len;
+			if (flag == FT260_FLAG_START_STOP)
+				rep->flag |= FT260_FLAG_STOP;
+		} else {
+			wr_len = FT260_WR_DATA_MAX;
+		}
 
-		rep->report = FT260_I2C_DATA_REPORT_ID(len);
+		rep->report = FT260_I2C_DATA_REPORT_ID(wr_len);
 		rep->address = addr;
-		rep->length = len;
-		rep->flag = flag;
+		rep->length = wr_len;
 
-		memcpy(rep->data, &data[idx], len);
+		memcpy(rep->data, &data[idx], wr_len);
 
-		ft260_dbg("rep %#02x addr %#02x off %d len %d d[0] %#02x\n",
-			  rep->report, addr, idx, len, data[0]);
+		ft260_dbg("rep %#02x addr %#02x off %d len %d wlen %d flag %#x d[0] %#02x\n",
+			  rep->report, addr, idx, len, wr_len,
+			  rep->flag, data[0]);
 
 		ret = ft260_hid_output_report_check_status(dev, (u8 *)rep,
-							   len + 4);
+							   wr_len + 4);
 		if (ret < 0) {
-			hid_err(hdev, "%s: failed to start transfer, ret %d\n",
-				__func__, ret);
+			hid_err(hdev, "%s: failed with %d\n", __func__, ret);
 			return ret;
 		}
 
-		data_len -= len;
-		idx += len;
+		len -= wr_len;
+		idx += wr_len;
+		rep->flag = 0;
 
-	} while (data_len > 0);
+	} while (len > 0);
 
 	return 0;
 }
···
 static int ft260_i2c_read(struct ft260_device *dev, u8 addr, u8 *data,
 			  u16 len, u8 flag)
 {
+	u16 rd_len;
+	u16 rd_data_max = 60;
+	int timeout, ret = 0;
 	struct ft260_i2c_read_request_report rep;
 	struct hid_device *hdev = dev->hdev;
-	int timeout;
-	int ret;
+	u8 bus_busy = 0;
 
-	if (len > FT260_RD_DATA_MAX) {
-		hid_err(hdev, "%s: unsupported rd len: %d\n", __func__, len);
-		return -EINVAL;
-	}
+	if ((flag & FT260_FLAG_START_REPEATED) == FT260_FLAG_START_REPEATED)
+		flag = FT260_FLAG_START_REPEATED;
+	else
+		flag = FT260_FLAG_START;
+	do {
+		if (len <= rd_data_max) {
+			rd_len = len;
+			flag |= FT260_FLAG_STOP;
+		} else {
+			rd_len = rd_data_max;
+		}
+		rd_data_max = FT260_RD_DATA_MAX;
 
-	dev->read_idx = 0;
-	dev->read_buf = data;
-	dev->read_len = len;
+		rep.report = FT260_I2C_READ_REQ;
+		rep.length = cpu_to_le16(rd_len);
+		rep.address = addr;
+		rep.flag = flag;
 
-	rep.report = FT260_I2C_READ_REQ;
-	rep.length = cpu_to_le16(len);
-	rep.address = addr;
-	rep.flag = flag;
+		ft260_dbg("rep %#02x addr %#02x len %d rlen %d flag %#x\n",
+			  rep.report, rep.address, len, rd_len, flag);
 
-	ft260_dbg("rep %#02x addr %#02x len %d\n", rep.report, rep.address,
-		  rep.length);
+		reinit_completion(&dev->wait);
 
-	reinit_completion(&dev->wait);
+		dev->read_idx = 0;
+		dev->read_buf = data;
+		dev->read_len = rd_len;
 
-	ret = ft260_hid_output_report(hdev, (u8 *)&rep, sizeof(rep));
-	if (ret < 0) {
-		hid_err(hdev, "%s: failed to start transaction, ret %d\n",
-			__func__, ret);
-		return ret;
-	}
+		ret = ft260_hid_output_report(hdev, (u8 *)&rep, sizeof(rep));
+		if (ret < 0) {
+			hid_err(hdev, "%s: failed with %d\n", __func__, ret);
+			goto ft260_i2c_read_exit;
+		}
 
-	timeout = msecs_to_jiffies(5000);
-	if (!wait_for_completion_timeout(&dev->wait, timeout)) {
-		ft260_i2c_reset(hdev);
-		return -ETIMEDOUT;
-	}
+		timeout = msecs_to_jiffies(5000);
+		if (!wait_for_completion_timeout(&dev->wait, timeout)) {
+			ret = -ETIMEDOUT;
+			ft260_i2c_reset(hdev);
+			goto ft260_i2c_read_exit;
+		}
 
-	ret = ft260_xfer_status(dev);
-	if (ret == 0)
-		return 0;
+		dev->read_buf = NULL;
 
-	ft260_i2c_reset(hdev);
-	return -EIO;
+		if (flag & FT260_FLAG_STOP)
+			bus_busy = FT260_I2C_STATUS_BUS_BUSY;
+
+		ret = ft260_xfer_status(dev, bus_busy);
+		if (ret < 0) {
+			ret = -EIO;
+			ft260_i2c_reset(hdev);
+			goto ft260_i2c_read_exit;
+		}
+
+		len -= rd_len;
+		data += rd_len;
+		flag = 0;
+
+	} while (len > 0);
+
+ft260_i2c_read_exit:
+	dev->read_buf = NULL;
+	return ret;
 }
 
 /*
···
  */
 static int ft260_i2c_write_read(struct ft260_device *dev, struct i2c_msg *msgs)
 {
-	int len, ret;
-	u16 left_len = msgs[1].len;
-	u8 *read_buf = msgs[1].buf;
+	int ret;
+	int wr_len = msgs[0].len;
+	int rd_len = msgs[1].len;
+	struct hid_device *hdev = dev->hdev;
 	u8 addr = msgs[0].addr;
 	u16 read_off = 0;
-	struct hid_device *hdev = dev->hdev;
 
-	if (msgs[0].len > 2) {
-		hid_err(hdev, "%s: unsupported wr len: %d\n", __func__,
-			msgs[0].len);
+	if (wr_len > 2) {
+		hid_err(hdev, "%s: invalid wr_len: %d\n", __func__, wr_len);
 		return -EOPNOTSUPP;
 	}
 
-	memcpy(&read_off, msgs[0].buf, msgs[0].len);
-
-	do {
-		if (left_len <= FT260_RD_DATA_MAX)
-			len = left_len;
+	if (ft260_debug) {
+		if (wr_len == 2)
+			read_off = be16_to_cpu(*(__be16 *)msgs[0].buf);
 		else
-			len = FT260_RD_DATA_MAX;
+			read_off = *msgs[0].buf;
 
-		ft260_dbg("read_off %#x left_len %d len %d\n", read_off,
-			  left_len, len);
+		pr_info("%s: off %#x rlen %d wlen %d\n", __func__,
+			read_off, rd_len, wr_len);
+	}
 
-		ret = ft260_i2c_write(dev, addr, (u8 *)&read_off, msgs[0].len,
-				      FT260_FLAG_START);
-		if (ret < 0)
-			return ret;
+	ret = ft260_i2c_write(dev, addr, msgs[0].buf, wr_len,
+			      FT260_FLAG_START);
+	if (ret < 0)
+		return ret;
 
-		ret = ft260_i2c_read(dev, addr, read_buf, len,
-				     FT260_FLAG_START_STOP);
-		if (ret < 0)
-			return ret;
-
-		left_len -= len;
-		read_buf += len;
-		read_off += len;
-
-	} while (left_len > 0);
+	ret = ft260_i2c_read(dev, addr, msgs[1].buf, rd_len,
+			     FT260_FLAG_START_STOP_REPEATED);
+	if (ret < 0)
+		return ret;
 
 	return 0;
 }
···
 	}
 
 	switch (size) {
-	case I2C_SMBUS_QUICK:
-		if (read_write == I2C_SMBUS_READ)
-			ret = ft260_i2c_read(dev, addr, &data->byte, 0,
-					     FT260_FLAG_START_STOP);
-		else
-			ret = ft260_smbus_write(dev, addr, cmd, NULL, 0,
-						FT260_FLAG_START_STOP);
-		break;
 	case I2C_SMBUS_BYTE:
 		if (read_write == I2C_SMBUS_READ)
 			ret = ft260_i2c_read(dev, addr, &data->byte, 1,
···
 
 static u32 ft260_functionality(struct i2c_adapter *adap)
 {
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_QUICK |
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_BYTE |
 	       I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
 	       I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_I2C_BLOCK;
 }
···
 }
 
 static int ft260_word_show(struct hid_device *hdev, int id, u8 *cfg, int len,
-			   u16 *field, u8 *buf)
+			   __le16 *field, u8 *buf)
 {
 	int ret;
 
···
 
 #define FT260_I2CST_ATTR_SHOW(name)					       \
 		FT260_ATTR_SHOW(name, ft260_get_i2c_status_report,	       \
-				FT260_I2C_STATUS, u16, ft260_word_show)
+				FT260_I2C_STATUS, __le16, ft260_word_show)
 
-#define FT260_ATTR_STORE(name, reptype, id, req, type, func)		       \
+#define FT260_ATTR_STORE(name, reptype, id, req, type, ctype, func)	       \
 	static ssize_t name##_store(struct device *kdev,		       \
 				    struct device_attribute *attr,	       \
 				    const char *buf, size_t count)	       \
···
 		type name;						       \
 		int ret;						       \
 									       \
-		if (!func(buf, 10, &name)) {				       \
+		if (!func(buf, 10, (ctype *)&name)) {			       \
 			rep.name = name;				       \
 			rep.report = id;				       \
 			rep.request = req;				       \
···
 
 #define FT260_BYTE_ATTR_STORE(name, reptype, req)			       \
 		FT260_ATTR_STORE(name, reptype, FT260_SYSTEM_SETTINGS, req,    \
-				 u8, kstrtou8)
+				 u8, u8, kstrtou8)
 
 #define FT260_WORD_ATTR_STORE(name, reptype, req)			       \
 		FT260_ATTR_STORE(name, reptype, FT260_SYSTEM_SETTINGS, req,    \
-				 u16, kstrtou16)
+				 __le16, u16, kstrtou16)
 
 FT260_SSTAT_ATTR_SHOW(chip_mode);
 static DEVICE_ATTR_RO(chip_mode);
···
 		return ret;
 	}
 
-	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+	ret = hid_hw_start(hdev, 0);
 	if (ret) {
 		hid_err(hdev, "failed to start HID HW\n");
 		return ret;
···
 	if (ret <= 0)
 		goto err_hid_close;
 
+	hid_info(hdev, "USB HID v%x.%02x Device [%s] on %s\n",
+		hdev->version >> 8, hdev->version & 0xff, hdev->name,
+		hdev->phys);
+
 	hid_set_drvdata(hdev, dev);
 	dev->hdev = hdev;
 	dev->adap.owner = THIS_MODULE;
···
 	dev->adap.quirks = &ft260_i2c_quirks;
 	dev->adap.dev.parent = &hdev->dev;
 	snprintf(dev->adap.name, sizeof(dev->adap.name),
-		 "FT260 usb-i2c bridge on hidraw%d",
-		 ((struct hidraw *)hdev->hidraw)->minor);
+		 "FT260 usb-i2c bridge");
 
 	mutex_init(&dev->lock);
 	init_completion(&dev->wait);
 
-	ret = ft260_xfer_status(dev);
+	ret = ft260_xfer_status(dev, FT260_I2C_STATUS_BUS_BUSY);
 	if (ret)
 		ft260_i2c_reset(hdev);
 
···
 		ft260_dbg("i2c resp: rep %#02x len %d\n", xfer->report,
 			  xfer->length);
 
+		if ((dev->read_buf == NULL) ||
+		    (xfer->length > dev->read_len - dev->read_idx)) {
+			hid_err(hdev, "unexpected report %#02x, length %d\n",
+				xfer->report, xfer->length);
+			return -1;
+		}
+
 		memcpy(&dev->read_buf[dev->read_idx], &xfer->data,
 		       xfer->length);
 		dev->read_idx += xfer->length;
···
 			complete(&dev->wait);
 
 	} else {
-		hid_err(hdev, "unknown report: %#02x\n", xfer->report);
-		return 0;
+		hid_err(hdev, "unhandled report %#02x\n", xfer->report);
 	}
-	return 1;
+	return 0;
 }
 
 static struct hid_driver ft260_driver = {

drivers/hid/hid-hyperv.c

···
 	unsigned short reserved[11];
 };
 
-/* The maximum size of a synthetic input message. */
-#define SYNTHHID_MAX_INPUT_REPORT_SIZE 16
-
 /*
  * Current version
  *
···
 struct synthhid_msg_hdr {
 	enum synthhid_msg_type type;
 	u32 size;
-};
-
-struct synthhid_msg {
-	struct synthhid_msg_hdr header;
-	char data[1]; /* Enclosed message */
 };
 
 union synthhid_version {
···
 
 struct synthhid_input_report {
 	struct synthhid_msg_hdr header;
-	char buffer[1];
+	char buffer[];
 };
 
 #pragma pack(pop)
···
 struct pipe_prt_msg {
 	enum pipe_prot_msg_type type;
 	u32 size;
-	char data[1];
+	char data[];
 };
 
 struct  mousevsc_prt_msg {
···
 
 	ret = vmbus_sendpacket(input_device->device->channel,
 			&ack,
-			sizeof(struct pipe_prt_msg) - sizeof(unsigned char) +
+			sizeof(struct pipe_prt_msg) +
 			sizeof(struct synthhid_device_info_ack),
 			(unsigned long)&ack,
 			VM_PKT_DATA_INBAND,
···
 				struct vmpacket_descriptor *packet)
 {
 	struct pipe_prt_msg *pipe_msg;
-	struct synthhid_msg *hid_msg;
+	struct synthhid_msg_hdr *hid_msg_hdr;
 	struct mousevsc_dev *input_dev = hv_get_drvdata(device);
 	struct synthhid_input_report *input_report;
 	size_t len;
···
 	if (pipe_msg->type != PIPE_MESSAGE_DATA)
 		return;
 
-	hid_msg = (struct synthhid_msg *)pipe_msg->data;
+	hid_msg_hdr = (struct synthhid_msg_hdr *)pipe_msg->data;
 
-	switch (hid_msg->header.type) {
+	switch (hid_msg_hdr->type) {
 	case SYNTH_HID_PROTOCOL_RESPONSE:
 		/*
 		 * While it will be impossible for us to protect against
 		 * malicious/buggy hypervisor/host, add a check here to
 		 * ensure we don't corrupt memory.
 		 */
-		if ((pipe_msg->size + sizeof(struct pipe_prt_msg)
-			- sizeof(unsigned char))
+		if (struct_size(pipe_msg, data, pipe_msg->size)
 			> sizeof(struct mousevsc_prt_msg)) {
 			WARN_ON(1);
 			break;
 		}
 
 		memcpy(&input_dev->protocol_resp, pipe_msg,
-		       pipe_msg->size + sizeof(struct pipe_prt_msg) -
-		       sizeof(unsigned char));
+				struct_size(pipe_msg, data, pipe_msg->size));
 		complete(&input_dev->wait_event);
 		break;
 
···
 		break;
 	default:
 		pr_err("unsupported hid msg type - type %d len %d\n",
-		       hid_msg->header.type, hid_msg->header.size);
+		       hid_msg_hdr->type, hid_msg_hdr->size);
 		break;
 	}
 
···
 	request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
 
 	ret = vmbus_sendpacket(device->channel, request,
-				sizeof(struct pipe_prt_msg) -
-				sizeof(unsigned char) +
+				sizeof(struct pipe_prt_msg) +
 				sizeof(struct synthhid_protocol_request),
 				(unsigned long)request,
 				VM_PKT_DATA_INBAND,

drivers/hid/hid-input.c

···
 #define HID_BATTERY_QUIRK_PERCENT	(1 << 0) /* always reports percent */
 #define HID_BATTERY_QUIRK_FEATURE	(1 << 1) /* ask for feature report */
 #define HID_BATTERY_QUIRK_IGNORE	(1 << 2) /* completely ignore the battery */
+#define HID_BATTERY_QUIRK_AVOID_QUERY	(1 << 3) /* do not query the battery */
 
 static const struct hid_device_id hid_battery_quirks[] = {
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
···
 	  HID_BATTERY_QUIRK_IGNORE },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
 	  HID_BATTERY_QUIRK_IGNORE },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
+	  HID_BATTERY_QUIRK_AVOID_QUERY },
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
 	  HID_BATTERY_QUIRK_IGNORE },
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
···
 	 */
 	dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 				   field->physical == HID_DG_STYLUS;
+
+	if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
+		dev->battery_avoid_query = true;
 
 	dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 	if (IS_ERR(dev->battery)) {

drivers/hid/hid-logitech-hidpp.c

···
 	ret = hidpp_send_rap_command_sync(hidpp,
 			REPORT_ID_HIDPP_SHORT,
 			HIDPP_PAGE_ROOT_IDX,
-			CMD_ROOT_GET_PROTOCOL_VERSION,
+			CMD_ROOT_GET_PROTOCOL_VERSION | LINUX_KERNEL_SW_ID,
 			ping_data, sizeof(ping_data), &response);
 
 	if (ret == HIDPP_ERROR_INVALID_SUBID) {

drivers/hid/hid-mcp2221.c

···
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/mutex.h>
+#include <linux/bitfield.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
 #include <linux/hid.h>
 #include <linux/hidraw.h>
 #include <linux/i2c.h>
 #include <linux/gpio/driver.h>
+#include <linux/iio/iio.h>
 #include "hid-ids.h"
 
 /* Commands codes in a raw output report */
···
 	MCP2221_I2C_CANCEL = 0x10,
 	MCP2221_GPIO_SET = 0x50,
 	MCP2221_GPIO_GET = 0x51,
+	MCP2221_SET_SRAM_SETTINGS = 0x60,
+	MCP2221_GET_SRAM_SETTINGS = 0x61,
+	MCP2221_READ_FLASH_DATA = 0xb0,
 };
 
 /* Response codes in a raw input report */
···
 	struct i2c_adapter adapter;
 	struct mutex lock;
 	struct completion wait_in_report;
+	struct delayed_work init_work;
 	u8 *rxbuf;
 	u8 txbuf[64];
 	int rxbuf_idx;
···
 	struct gpio_chip *gc;
 	u8 gp_idx;
 	u8 gpio_dir;
+	u8 mode[4];
+#if IS_REACHABLE(CONFIG_IIO)
+	struct iio_chan_spec iio_channels[3];
+	u16 adc_values[3];
+	u8 adc_scale;
+	u8 dac_value;
+	u16 dac_scale;
+#endif
+};
+
+struct mcp2221_iio {
+	struct mcp2221 *mcp;
 };
 
 /*
···
 	.functionality = mcp_i2c_func,
 };
 
+#if IS_REACHABLE(CONFIG_GPIOLIB)
 static int mcp_gpio_get(struct gpio_chip *gc,
 				unsigned int offset)
 {
···
 
 	return GPIO_LINE_DIRECTION_OUT;
 }
+#endif
 
 /* Gives current state of i2c engine inside mcp2221 */
 static int mcp_get_i2c_eng_state(struct mcp2221 *mcp,
···
 				break;
 			}
 			mcp->status = mcp_get_i2c_eng_state(mcp, data, 8);
+#if IS_REACHABLE(CONFIG_IIO)
+			memcpy(&mcp->adc_values, &data[50], sizeof(mcp->adc_values));
+#endif
 			break;
 		default:
 			mcp->status = -EIO;
···
 		complete(&mcp->wait_in_report);
 		break;
 
+	case MCP2221_SET_SRAM_SETTINGS:
+		switch (data[1]) {
+		case MCP2221_SUCCESS:
+			mcp->status = 0;
+			break;
+		default:
+			mcp->status = -EAGAIN;
+		}
+		complete(&mcp->wait_in_report);
+		break;
+
+	case MCP2221_GET_SRAM_SETTINGS:
+		switch (data[1]) {
+		case MCP2221_SUCCESS:
+			memcpy(&mcp->mode, &data[22], 4);
+#if IS_REACHABLE(CONFIG_IIO)
+			mcp->dac_value = data[6] & GENMASK(4, 0);
+#endif
+			mcp->status = 0;
+			break;
+		default:
+			mcp->status = -EAGAIN;
+		}
+		complete(&mcp->wait_in_report);
+		break;
+
+	case MCP2221_READ_FLASH_DATA:
+		switch (data[1]) {
+		case MCP2221_SUCCESS:
+			mcp->status = 0;
+
+			/* Only handles CHIP SETTINGS subpage currently */
+			if (mcp->txbuf[1] != 0) {
+				mcp->status = -EIO;
+				break;
+			}
+
+#if IS_REACHABLE(CONFIG_IIO)
+			{
+				u8 tmp;
+				/* DAC scale value */
+				tmp = FIELD_GET(GENMASK(7, 6), data[6]);
+				if ((data[6] & BIT(5)) && tmp)
+					mcp->dac_scale = tmp + 4;
+				else
+					mcp->dac_scale = 5;
+
+				/* ADC scale value */
+				tmp = FIELD_GET(GENMASK(4, 3), data[7]);
+				if ((data[7] & BIT(2)) && tmp)
+					mcp->adc_scale = tmp - 1;
+				else
+					mcp->adc_scale = 0;
+			}
+#endif
+
+			break;
+		default:
+			mcp->status = -EAGAIN;
+		}
+		complete(&mcp->wait_in_report);
+		break;
+
 	default:
 		mcp->status = -EIO;
 		complete(&mcp->wait_in_report);
···
 
 	return 1;
 }
+
+/* Device resource managed function for HID unregistration */
+static void mcp2221_hid_unregister(void *ptr)
+{
+	struct hid_device *hdev = ptr;
+
+	hid_hw_close(hdev);
+	hid_hw_stop(hdev);
+}
+
+/* This is needed to be sure hid_hw_stop() isn't called twice by the subsystem */
+static void mcp2221_remove(struct hid_device *hdev)
+{
+}
+
+#if IS_REACHABLE(CONFIG_IIO)
+static int mcp2221_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *channel, int *val,
+			    int *val2, long mask)
+{
+	struct mcp2221_iio *priv = iio_priv(indio_dev);
+	struct mcp2221 *mcp = priv->mcp;
+	int ret;
+
+	if (mask == IIO_CHAN_INFO_SCALE) {
+		if (channel->output)
+			*val = 1 << mcp->dac_scale;
+		else
+			*val = 1 << mcp->adc_scale;
+
+		return IIO_VAL_INT;
+	}
+
+	mutex_lock(&mcp->lock);
+
+	if (channel->output) {
+		*val = mcp->dac_value;
+		ret = IIO_VAL_INT;
+	} else {
+		/* Read ADC values */
+		ret = mcp_chk_last_cmd_status(mcp);
+
+		if (!ret) {
+			*val = le16_to_cpu((__force __le16) mcp->adc_values[channel->address]);
+			if (*val >= BIT(10))
+				ret =  -EINVAL;
+			else
+				ret = IIO_VAL_INT;
+		}
+	}
+
+	mutex_unlock(&mcp->lock);
+
+	return ret;
+}
+
+static int mcp2221_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct mcp2221_iio *priv = iio_priv(indio_dev);
+	struct mcp2221 *mcp = priv->mcp;
+	int ret;
+
+	if (val < 0 || val >= BIT(5))
+		return -EINVAL;
+
+	mutex_lock(&mcp->lock);
+
+	memset(mcp->txbuf, 0, 12);
+	mcp->txbuf[0] = MCP2221_SET_SRAM_SETTINGS;
+	mcp->txbuf[4] = BIT(7) | val;
+
+	ret = mcp_send_data_req_status(mcp, mcp->txbuf, 12);
+	if (!ret)
+		mcp->dac_value = val;
+
+	mutex_unlock(&mcp->lock);
+
+	return ret;
+}
+
+static const struct iio_info mcp2221_info = {
+	.read_raw = &mcp2221_read_raw,
+	.write_raw = &mcp2221_write_raw,
+};
+
+static int mcp_iio_channels(struct mcp2221 *mcp)
+{
+	int idx, cnt = 0;
+	bool dac_created = false;
+
+	/* GP0 doesn't have ADC/DAC alternative function */
+	for (idx = 1; idx < MCP_NGPIO; idx++) {
+		struct iio_chan_spec *chan = &mcp->iio_channels[cnt];
+
+		switch (mcp->mode[idx]) {
+		case 2:
+			chan->address = idx - 1;
+			chan->channel = cnt++;
+			break;
+		case 3:
+			/* GP1 doesn't have DAC alternative function */
+			if (idx == 1 || dac_created)
+				continue;
+			/* DAC1 and DAC2 outputs are connected to the same DAC */
+			dac_created = true;
+			chan->output = 1;
+			cnt++;
+			break;
+		default:
+			continue;
+		};
+
+		chan->type = IIO_VOLTAGE;
+		chan->indexed = 1;
+		chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+		chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE);
+		chan->scan_index = -1;
+	}
+
+	return cnt;
+}
+
+static void mcp_init_work(struct work_struct *work)
+{
+	struct iio_dev *indio_dev;
+	struct mcp2221 *mcp = container_of(work, struct mcp2221, init_work.work);
+	struct mcp2221_iio *data;
+	static int retries = 5;
+	int ret, num_channels;
+
+	hid_hw_power(mcp->hdev, PM_HINT_FULLON);
+	mutex_lock(&mcp->lock);
+
+	mcp->txbuf[0] = MCP2221_GET_SRAM_SETTINGS;
+	ret = mcp_send_data_req_status(mcp, mcp->txbuf, 1);
+
+	if (ret == -EAGAIN)
+		goto reschedule_task;
+
+	num_channels = mcp_iio_channels(mcp);
+	if (!num_channels)
+		goto unlock;
+
+	mcp->txbuf[0] = MCP2221_READ_FLASH_DATA;
+	mcp->txbuf[1] = 0;
+	ret = mcp_send_data_req_status(mcp, mcp->txbuf, 2);
+
+	if (ret == -EAGAIN)
+		goto reschedule_task;
+
+	indio_dev = devm_iio_device_alloc(&mcp->hdev->dev, sizeof(*data));
+	if (!indio_dev)
+		goto unlock;
+
+	data = iio_priv(indio_dev);
+	data->mcp = mcp;
+
+	indio_dev->name = "mcp2221";
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &mcp2221_info;
+	indio_dev->channels = mcp->iio_channels;
+	indio_dev->num_channels = num_channels;
+
+	devm_iio_device_register(&mcp->hdev->dev, indio_dev);
+
+unlock:
+	mutex_unlock(&mcp->lock);
+	hid_hw_power(mcp->hdev, PM_HINT_NORMAL);
+
+	return;
+
+reschedule_task:
+	mutex_unlock(&mcp->lock);
+	hid_hw_power(mcp->hdev, PM_HINT_NORMAL);
+
+	if (!retries--)
+		return;
+
+	/* Device is not ready to read SRAM or FLASH data, try again */
+	schedule_delayed_work(&mcp->init_work, msecs_to_jiffies(100));
+}
+#endif
 
 static int mcp2221_probe(struct hid_device *hdev,
 					const struct hid_device_id *id)
···
 	ret = hid_hw_open(hdev);
 	if (ret) {
 		hid_err(hdev, "can't open device\n");
-		goto err_hstop;
+		hid_hw_stop(hdev);
+		return ret;
 	}
 
 	mutex_init(&mcp->lock);
 	init_completion(&mcp->wait_in_report);
 	hid_set_drvdata(hdev, mcp);
 	mcp->hdev = hdev;
+
+	ret = devm_add_action_or_reset(&hdev->dev, mcp2221_hid_unregister, hdev);
+	if (ret)
+		return ret;
 
 	/* Set I2C bus clock diviser */
 	if (i2c_clk_freq > 400)
···
 			"MCP2221 usb-i2c bridge on hidraw%d",
 			((struct hidraw *)hdev->hidraw)->minor);
 
-	ret = i2c_add_adapter(&mcp->adapter);
+	ret = devm_i2c_add_adapter(&hdev->dev, &mcp->adapter);
 	if (ret) {
 		hid_err(hdev, "can't add usb-i2c adapter: %d\n", ret);
-		goto err_i2c;
+		return ret;
 	}
 	i2c_set_adapdata(&mcp->adapter, mcp);
 
+#if IS_REACHABLE(CONFIG_GPIOLIB)
 	/* Setup GPIO chip */
 	mcp->gc = devm_kzalloc(&hdev->dev, sizeof(*mcp->gc), GFP_KERNEL);
-	if (!mcp->gc) {
-		ret = -ENOMEM;
-		goto err_gc;
-	}
+	if (!mcp->gc)
+		return -ENOMEM;
 
 	mcp->gc->label = "mcp2221_gpio";
 	mcp->gc->direction_input = mcp_gpio_direction_input;
···
 
 	ret = devm_gpiochip_add_data(&hdev->dev, mcp->gc, mcp);
 	if (ret)
-		goto err_gc;
+		return ret;
+#endif
+
+#if IS_REACHABLE(CONFIG_IIO)
+	INIT_DELAYED_WORK(&mcp->init_work, mcp_init_work);
+	schedule_delayed_work(&mcp->init_work, msecs_to_jiffies(100));
+#endif
 
 	return 0;
-
-err_gc:
-	i2c_del_adapter(&mcp->adapter);
-err_i2c:
-	hid_hw_close(mcp->hdev);
-err_hstop:
-	hid_hw_stop(mcp->hdev);
-	return ret;
-}
-
-static void mcp2221_remove(struct hid_device *hdev)
-{
-	struct mcp2221 *mcp = hid_get_drvdata(hdev);
-
-	i2c_del_adapter(&mcp->adapter);
-	hid_hw_close(mcp->hdev);
-	hid_hw_stop(mcp->hdev);
 }
 
 static const struct hid_device_id mcp2221_devices[] = {

drivers/hid/hid-playstation.c

···
 /*
  *  HID driver for Sony DualSense(TM) controller.
  *
- *  Copyright (c) 2020 Sony Interactive Entertainment
+ *  Copyright (c) 2020-2022 Sony Interactive Entertainment
  */
 
 #include <linux/bits.h>
···
 struct ps_led_info {
 	const char *name;
 	const char *color;
+	int max_brightness;
 	enum led_brightness (*brightness_get)(struct led_classdev *cdev);
 	int (*brightness_set)(struct led_classdev *cdev, enum led_brightness);
+	int (*blink_set)(struct led_classdev *led, unsigned long *on, unsigned long *off);
 };
 
 /* Seed values for DualShock4 / DualSense CRC32 for different report types. */
···
 	struct dualsense_output_report_common *common;
 };
 
+#define DS4_INPUT_REPORT_USB			0x01
+#define DS4_INPUT_REPORT_USB_SIZE		64
+#define DS4_INPUT_REPORT_BT			0x11
+#define DS4_INPUT_REPORT_BT_SIZE		78
+#define DS4_OUTPUT_REPORT_USB			0x05
+#define DS4_OUTPUT_REPORT_USB_SIZE		32
+#define DS4_OUTPUT_REPORT_BT			0x11
+#define DS4_OUTPUT_REPORT_BT_SIZE		78
+
+#define DS4_FEATURE_REPORT_CALIBRATION		0x02
+#define DS4_FEATURE_REPORT_CALIBRATION_SIZE	37
+#define DS4_FEATURE_REPORT_CALIBRATION_BT	0x05
+#define DS4_FEATURE_REPORT_CALIBRATION_BT_SIZE	41
+#define DS4_FEATURE_REPORT_FIRMWARE_INFO	0xa3
+#define DS4_FEATURE_REPORT_FIRMWARE_INFO_SIZE	49
+#define DS4_FEATURE_REPORT_PAIRING_INFO		0x12
+#define DS4_FEATURE_REPORT_PAIRING_INFO_SIZE	16
+
+/*
+ * Status of a DualShock4 touch point contact.
+ * Contact IDs, with highest bit set are 'inactive'
+ * and any associated data is then invalid.
+ */
+#define DS4_TOUCH_POINT_INACTIVE BIT(7)
+
+/* Status field of DualShock4 input report. */
+#define DS4_STATUS0_BATTERY_CAPACITY	GENMASK(3, 0)
+#define DS4_STATUS0_CABLE_STATE		BIT(4)
+/* Battery status within batery_status field. */
+#define DS4_BATTERY_STATUS_FULL		11
+/* Status1 bit2 contains dongle connection state:
+ * 0 = connectd
+ * 1 = disconnected
+ */
+#define DS4_STATUS1_DONGLE_STATE	BIT(2)
+
+/* The lower 6 bits of hw_control of the Bluetooth main output report
+ * control the interval at which Dualshock 4 reports data:
+ * 0x00 - 1ms
+ * 0x01 - 1ms
+ * 0x02 - 2ms
+ * 0x3E - 62ms
+ * 0x3F - disabled
+ */
+#define DS4_OUTPUT_HWCTL_BT_POLL_MASK	0x3F
+/* Default to 4ms poll interval, which is same as USB (not adjustable). */
+#define DS4_BT_DEFAULT_POLL_INTERVAL_MS	4
+#define DS4_OUTPUT_HWCTL_CRC32		0x40
+#define DS4_OUTPUT_HWCTL_HID		0x80
+
+/* Flags for DualShock4 output report. */
+#define DS4_OUTPUT_VALID_FLAG0_MOTOR		0x01
+#define DS4_OUTPUT_VALID_FLAG0_LED		0x02
+#define DS4_OUTPUT_VALID_FLAG0_LED_BLINK	0x04
+
+/* DualShock4 hardware limits */
+#define DS4_ACC_RES_PER_G	8192
+#define DS4_ACC_RANGE		(4*DS_ACC_RES_PER_G)
+#define DS4_GYRO_RES_PER_DEG_S	1024
+#define DS4_GYRO_RANGE		(2048*DS_GYRO_RES_PER_DEG_S)
+#define DS4_LIGHTBAR_MAX_BLINK	255 /* 255 centiseconds */
+#define DS4_TOUCHPAD_WIDTH	1920
+#define DS4_TOUCHPAD_HEIGHT	942
+
+enum dualshock4_dongle_state {
+	DONGLE_DISCONNECTED,
+	DONGLE_CALIBRATING,
+	DONGLE_CONNECTED,
+	DONGLE_DISABLED
+};
+
+struct dualshock4 {
+	struct ps_device base;
+	struct input_dev *gamepad;
+	struct input_dev *sensors;
+	struct input_dev *touchpad;
+
+	/* Calibration data for accelerometer and gyroscope. */
+	struct ps_calibration_data accel_calib_data[3];
+	struct ps_calibration_data gyro_calib_data[3];
+
+	/* Only used on dongle to track state transitions. */
+	enum dualshock4_dongle_state dongle_state;
+	/* Used during calibration. */
+	struct work_struct dongle_hotplug_worker;
+
+	/* Timestamp for sensor data */
+	bool sensor_timestamp_initialized;
+	uint32_t prev_sensor_timestamp;
+	uint32_t sensor_timestamp_us;
+
+	/* Bluetooth poll interval */
+	bool update_bt_poll_interval;
+	uint8_t bt_poll_interval;
+
+	bool update_rumble;
+	uint8_t motor_left;
+	uint8_t motor_right;
+
+	/* Lightbar leds */
+	bool update_lightbar;
+	bool update_lightbar_blink;
+	bool lightbar_enabled; /* For use by global LED control. */
+	uint8_t lightbar_red;
+	uint8_t lightbar_green;
+	uint8_t lightbar_blue;
+	uint8_t lightbar_blink_on; /* In increments of 10ms. */
+	uint8_t lightbar_blink_off; /* In increments of 10ms. */
+	struct led_classdev lightbar_leds[4];
+
+	struct work_struct output_worker;
+	bool output_worker_initialized;
+	void *output_report_dmabuf;
+};
+
+struct dualshock4_touch_point {
+	uint8_t contact;
+	uint8_t x_lo;
+	uint8_t x_hi:4, y_lo:4;
+	uint8_t y_hi;
+} __packed;
+static_assert(sizeof(struct dualshock4_touch_point) == 4);
+
+struct dualshock4_touch_report {
+	uint8_t timestamp;
+	struct dualshock4_touch_point points[2];
+} __packed;
+static_assert(sizeof(struct dualshock4_touch_report) == 9);
+
+/* Main DualShock4 input report excluding any BT/USB specific headers. */
+struct dualshock4_input_report_common {
+	uint8_t x, y;
+	uint8_t rx, ry;
+	uint8_t buttons[3];
+	uint8_t z, rz;
+
+	/* Motion sensors */
+	__le16 sensor_timestamp;
+	uint8_t sensor_temperature;
+	__le16 gyro[3]; /* x, y, z */
+	__le16 accel[3]; /* x, y, z */
+	uint8_t reserved2[5];
+
+	uint8_t status[2];
+	uint8_t reserved3;
+} __packed;
+static_assert(sizeof(struct dualshock4_input_report_common) == 32);
+
+struct dualshock4_input_report_usb {
+	uint8_t report_id; /* 0x01 */
+	struct dualshock4_input_report_common common;
+	uint8_t num_touch_reports;
+	struct dualshock4_touch_report touch_reports[3];
+	uint8_t reserved[3];
+} __packed;
+static_assert(sizeof(struct dualshock4_input_report_usb) == DS4_INPUT_REPORT_USB_SIZE);
+
+struct dualshock4_input_report_bt {
+	uint8_t report_id; /* 0x11 */
+	uint8_t reserved[2];
+	struct dualshock4_input_report_common common;
+	uint8_t num_touch_reports;
+	struct dualshock4_touch_report touch_reports[4]; /* BT has 4 compared to 3 for USB */
+	uint8_t reserved2[2];
+	__le32 crc32;
+} __packed;
+static_assert(sizeof(struct dualshock4_input_report_bt) == DS4_INPUT_REPORT_BT_SIZE);
+
+/* Common data between Bluetooth and USB DualShock4 output reports. */
+struct dualshock4_output_report_common {
+	uint8_t valid_flag0;
+	uint8_t valid_flag1;
+
+	uint8_t reserved;
+
+	uint8_t motor_right;
+	uint8_t motor_left;
+
+	uint8_t lightbar_red;
+	uint8_t lightbar_green;
+	uint8_t lightbar_blue;
+	uint8_t lightbar_blink_on;
+	uint8_t lightbar_blink_off;
+} __packed;
+
+struct dualshock4_output_report_usb {
+	uint8_t report_id; /* 0x5 */
+	struct dualshock4_output_report_common common;
+	uint8_t reserved[21];
+} __packed;
+static_assert(sizeof(struct dualshock4_output_report_usb) == DS4_OUTPUT_REPORT_USB_SIZE);
+
+struct dualshock4_output_report_bt {
+	uint8_t report_id; /* 0x11 */
+	uint8_t hw_control;
+	uint8_t audio_control;
+	struct dualshock4_output_report_common common;
+	uint8_t reserved[61];
+	__le32 crc32;
+} __packed;
+static_assert(sizeof(struct dualshock4_output_report_bt) == DS4_OUTPUT_REPORT_BT_SIZE);
+
+/*
+ * The DualShock4 has a main output report used to control most features. It is
+ * largely the same between Bluetooth and USB except for different headers and CRC.
+ * This structure hide the differences between the two to simplify sending output reports.
+ */
+struct dualshock4_output_report {
+	uint8_t *data; /* Start of data */
+	uint8_t len; /* Size of output report */
+
+	/* Points to Bluetooth data payload in case for a Bluetooth report else NULL. */
+	struct dualshock4_output_report_bt *bt;
+	/* Points to USB data payload in case for a USB report else NULL. */
+	struct dualshock4_output_report_usb *usb;
+	/* Points to common section of report, so past any headers. */
+	struct dualshock4_output_report_common *common;
+};
+
 /*
  * Common gamepad buttons across DualShock 3 / 4 and DualSense.
  * Note: for device with a touchpad, touchpad button is not included
···
 	{0, 0},
 };
 
+static int dualshock4_get_calibration_data(struct dualshock4 *ds4);
 static inline void dualsense_schedule_work(struct dualsense *ds);
+static inline void dualshock4_schedule_work(struct dualshock4 *ds4);
 static void dualsense_set_lightbar(struct dualsense *ds, uint8_t red, uint8_t green, uint8_t blue);
+static void dualshock4_set_default_lightbar_colors(struct dualshock4 *ds4);
 
 /*
  * Add a new ps_device to ps_devices if it doesn't exist.
···
 	return gamepad;
 }
 
-static int ps_get_report(struct hid_device *hdev, uint8_t report_id, uint8_t *buf, size_t size)
+static int ps_get_report(struct hid_device *hdev, uint8_t report_id, uint8_t *buf, size_t size,
+		bool check_crc)
 {
 	int ret;
 
···
 		return -EINVAL;
 	}
 
-	if (hdev->bus == BUS_BLUETOOTH) {
+	if (hdev->bus == BUS_BLUETOOTH && check_crc) {
 		/* Last 4 bytes contains crc32. */
 		uint8_t crc_offset = size - 4;
 		uint32_t report_crc = get_unaligned_le32(&buf[crc_offset]);
···
 {
 	int ret;
 
-	led->name = devm_kasprintf(&ps_dev->hdev->dev, GFP_KERNEL,
-			"%s:%s:%s", ps_dev->input_dev_name, led_info->color, led_info->name);
+	if (led_info->name) {
+		led->name = devm_kasprintf(&ps_dev->hdev->dev, GFP_KERNEL,
+				"%s:%s:%s", ps_dev->input_dev_name, led_info->color, led_info->name);
+	} else {
+		/* Backwards compatible mode for hid-sony, but not compliant with LED class spec. */
+		led->name = devm_kasprintf(&ps_dev->hdev->dev, GFP_KERNEL,
+				"%s:%s", ps_dev->input_dev_name, led_info->color);
+	}
 
 	if (!led->name)
 		return -ENOMEM;
 
 	led->brightness = 0;
-	led->max_brightness = 1;
+	led->max_brightness = led_info->max_brightness;
 	led->flags = LED_CORE_SUSPENDRESUME;
 	led->brightness_get = led_info->brightness_get;
 	led->brightness_set_blocking = led_info->brightness_set;
+	led->blink_set = led_info->blink_set;
 
 	ret = devm_led_classdev_register(&ps_dev->hdev->dev, led);
 	if (ret) {
···
 		return -ENOMEM;
 
 	ret = ps_get_report(ds->base.hdev, DS_FEATURE_REPORT_CALIBRATION, buf,
-			DS_FEATURE_REPORT_CALIBRATION_SIZE);
+			DS_FEATURE_REPORT_CALIBRATION_SIZE, true);
 	if (ret) {
 		hid_err(ds->base.hdev, "Failed to retrieve DualSense calibration info: %d\n", ret);
 		goto err_free;
···
 		return -ENOMEM;
 
 	ret = ps_get_report(ds->base.hdev, DS_FEATURE_REPORT_FIRMWARE_INFO, buf,
-			DS_FEATURE_REPORT_FIRMWARE_INFO_SIZE);
+			DS_FEATURE_REPORT_FIRMWARE_INFO_SIZE, true);
 	if (ret) {
 		hid_err(ds->base.hdev, "Failed to retrieve DualSense firmware info: %d\n", ret);
 		goto err_free;
···
 		return -ENOMEM;
 
 	ret = ps_get_report(ds->base.hdev, DS_FEATURE_REPORT_PAIRING_INFO, buf,
-			DS_FEATURE_REPORT_PAIRING_INFO_SIZE);
+			DS_FEATURE_REPORT_PAIRING_INFO_SIZE, true);
 	if (ret) {
 		hid_err(ds->base.hdev, "Failed to retrieve DualSense pairing info: %d\n", ret);
 		goto err_free;
···
 	int i, ret;
 
 	static const struct ps_led_info player_leds_info[] = {
-		{ LED_FUNCTION_PLAYER1, "white", dualsense_player_led_get_brightness,
+		{ LED_FUNCTION_PLAYER1, "white", 1, dualsense_player_led_get_brightness,
 				dualsense_player_led_set_brightness },
-		{ LED_FUNCTION_PLAYER2, "white", dualsense_player_led_get_brightness,
+		{ LED_FUNCTION_PLAYER2, "white", 1, dualsense_player_led_get_brightness,
 				dualsense_player_led_set_brightness },
-		{ LED_FUNCTION_PLAYER3, "white", dualsense_player_led_get_brightness,
+		{ LED_FUNCTION_PLAYER3, "white", 1, dualsense_player_led_get_brightness,
 				dualsense_player_led_set_brightness },
-		{ LED_FUNCTION_PLAYER4, "white", dualsense_player_led_get_brightness,
+		{ LED_FUNCTION_PLAYER4, "white", 1, dualsense_player_led_get_brightness,
 				dualsense_player_led_set_brightness },
-		{ LED_FUNCTION_PLAYER5, "white", dualsense_player_led_get_brightness,
+		{ LED_FUNCTION_PLAYER5, "white", 1, dualsense_player_led_get_brightness,
 				dualsense_player_led_set_brightness }
 	};
 
···
 	return ERR_PTR(ret);
 }
 
+static void dualshock4_dongle_calibration_work(struct work_struct *work)
+{
+	struct dualshock4 *ds4 = container_of(work, struct dualshock4, dongle_hotplug_worker);
+	unsigned long flags;
+	enum dualshock4_dongle_state dongle_state;
+	int ret;
+
+	ret = dualshock4_get_calibration_data(ds4);
+	if (ret < 0) {
+		/* This call is very unlikely to fail for the dongle. When it
+		 * fails we are probably in a very bad state, so mark the
+		 * dongle as disabled. We will re-enable the dongle if a new
+		 * DS4 hotplug is detect from sony_raw_event as any issues
+		 * are likely resolved then (the dongle is quite stupid).
+		 */
+		hid_err(ds4->base.hdev, "DualShock 4 USB dongle: calibration failed, disabling device\n");
+		dongle_state = DONGLE_DISABLED;
+	} else {
+		hid_info(ds4->base.hdev, "DualShock 4 USB dongle: calibration completed\n");
+		dongle_state = DONGLE_CONNECTED;
+	}
+
+	spin_lock_irqsave(&ds4->base.lock, flags);
+	ds4->dongle_state = dongle_state;
+	spin_unlock_irqrestore(&ds4->base.lock, flags);
+}
+
+static int dualshock4_get_calibration_data(struct dualshock4 *ds4)
+{
+	struct hid_device *hdev = ds4->base.hdev;
+	short gyro_pitch_bias, gyro_pitch_plus, gyro_pitch_minus;
+	short gyro_yaw_bias, gyro_yaw_plus, gyro_yaw_minus;
+	short gyro_roll_bias, gyro_roll_plus, gyro_roll_minus;
+	short gyro_speed_plus, gyro_speed_minus;
+	short acc_x_plus, acc_x_minus;
+	short acc_y_plus, acc_y_minus;
+	short acc_z_plus, acc_z_minus;
+	int speed_2x;
+	int range_2g;
+	int ret = 0;
+	uint8_t *buf;
+
+	if (ds4->base.hdev->bus == BUS_USB) {
+		int retries;
+
+		buf = kzalloc(DS4_FEATURE_REPORT_CALIBRATION_SIZE, GFP_KERNEL);
+		if (!buf)
+			return -ENOMEM;
+
+		/* We should normally receive the feature report data we asked
+		 * for, but hidraw applications such as Steam can issue feature
+		 * reports as well. In particular for Dongle reconnects, Steam
+		 * and this function are competing resulting in often receiving
+		 * data for a different HID report, so retry a few times.
+		 */
+		for (retries = 0; retries < 3; retries++) {
+			ret = ps_get_report(hdev, DS4_FEATURE_REPORT_CALIBRATION, buf,
+					DS4_FEATURE_REPORT_CALIBRATION_SIZE, true);
+			if (ret) {
+				if (retries < 2) {
+					hid_warn(hdev, "Retrying DualShock 4 get calibration report (0x02) request\n");
+					continue;
+				} else {
+					ret = -EILSEQ;
+					goto err_free;
+				}
+				hid_err(hdev, "Failed to retrieve DualShock4 calibration info: %d\n", ret);
+				goto err_free;
+			} else {
+				break;
+			}
+		}
+	} else { /* Bluetooth */
+		buf = kzalloc(DS4_FEATURE_REPORT_CALIBRATION_BT_SIZE, GFP_KERNEL);
+		if (!buf)
+			return -ENOMEM;
+
+		ret = ps_get_report(hdev, DS4_FEATURE_REPORT_CALIBRATION_BT, buf,
+				DS4_FEATURE_REPORT_CALIBRATION_BT_SIZE, true);
+		if (ret) {
+			hid_err(hdev, "Failed to retrieve DualShock4 calibration info: %d\n", ret);
+			goto err_free;
+		}
+	}
+
+	gyro_pitch_bias  = get_unaligned_le16(&buf[1]);
+	gyro_yaw_bias    = get_unaligned_le16(&buf[3]);
+	gyro_roll_bias   = get_unaligned_le16(&buf[5]);
+	if (ds4->base.hdev->bus == BUS_USB) {
+		gyro_pitch_plus  = get_unaligned_le16(&buf[7]);
+		gyro_pitch_minus = get_unaligned_le16(&buf[9]);
+		gyro_yaw_plus    = get_unaligned_le16(&buf[11]);
+		gyro_yaw_minus   = get_unaligned_le16(&buf[13]);
+		gyro_roll_plus   = get_unaligned_le16(&buf[15]);
+		gyro_roll_minus  = get_unaligned_le16(&buf[17]);
+	} else {
+		/* BT + Dongle */
+		gyro_pitch_plus  = get_unaligned_le16(&buf[7]);
+		gyro_yaw_plus    = get_unaligned_le16(&buf[9]);
+		gyro_roll_plus   = get_unaligned_le16(&buf[11]);
+		gyro_pitch_minus = get_unaligned_le16(&buf[13]);
+		gyro_yaw_minus   = get_unaligned_le16(&buf[15]);
+		gyro_roll_minus  = get_unaligned_le16(&buf[17]);
+	}
+	gyro_speed_plus  = get_unaligned_le16(&buf[19]);
+	gyro_speed_minus = get_unaligned_le16(&buf[21]);
+	acc_x_plus       = get_unaligned_le16(&buf[23]);
+	acc_x_minus      = get_unaligned_le16(&buf[25]);
+	acc_y_plus       = get_unaligned_le16(&buf[27]);
+	acc_y_minus      = get_unaligned_le16(&buf[29]);
+	acc_z_plus       = get_unaligned_le16(&buf[31]);
+	acc_z_minus      = get_unaligned_le16(&buf[33]);
+
+	/*
+	 * Set gyroscope calibration and normalization parameters.
+	 * Data values will be normalized to 1/DS4_GYRO_RES_PER_DEG_S degree/s.
+	 */
+	speed_2x = (gyro_speed_plus + gyro_speed_minus);
+	ds4->gyro_calib_data[0].abs_code = ABS_RX;
+	ds4->gyro_calib_data[0].bias = gyro_pitch_bias;
+	ds4->gyro_calib_data[0].sens_numer = speed_2x*DS4_GYRO_RES_PER_DEG_S;
+	ds4->gyro_calib_data[0].sens_denom = gyro_pitch_plus - gyro_pitch_minus;
+
+	ds4->gyro_calib_data[1].abs_code = ABS_RY;
+	ds4->gyro_calib_data[1].bias = gyro_yaw_bias;
+	ds4->gyro_calib_data[1].sens_numer = speed_2x*DS4_GYRO_RES_PER_DEG_S;
+	ds4->gyro_calib_data[1].sens_denom = gyro_yaw_plus - gyro_yaw_minus;
+
+	ds4->gyro_calib_data[2].abs_code = ABS_RZ;
+	ds4->gyro_calib_data[2].bias = gyro_roll_bias;
+	ds4->gyro_calib_data[2].sens_numer = speed_2x*DS4_GYRO_RES_PER_DEG_S;
+	ds4->gyro_calib_data[2].sens_denom = gyro_roll_plus - gyro_roll_minus;
+
+	/*
+	 * Set accelerometer calibration and normalization parameters.
+	 * Data values will be normalized to 1/DS4_ACC_RES_PER_G g.
+	 */
+	range_2g = acc_x_plus - acc_x_minus;
+	ds4->accel_calib_data[0].abs_code = ABS_X;
+	ds4->accel_calib_data[0].bias = acc_x_plus - range_2g / 2;
+	ds4->accel_calib_data[0].sens_numer = 2*DS4_ACC_RES_PER_G;
+	ds4->accel_calib_data[0].sens_denom = range_2g;
+
+	range_2g = acc_y_plus - acc_y_minus;
+	ds4->accel_calib_data[1].abs_code = ABS_Y;
+	ds4->accel_calib_data[1].bias = acc_y_plus - range_2g / 2;
+	ds4->accel_calib_data[1].sens_numer = 2*DS4_ACC_RES_PER_G;
+	ds4->accel_calib_data[1].sens_denom = range_2g;
+
+	range_2g = acc_z_plus - acc_z_minus;
+	ds4->accel_calib_data[2].abs_code = ABS_Z;
+	ds4->accel_calib_data[2].bias = acc_z_plus - range_2g / 2;
+	ds4->accel_calib_data[2].sens_numer = 2*DS4_ACC_RES_PER_G;
+	ds4->accel_calib_data[2].sens_denom = range_2g;
+
+err_free:
+	kfree(buf);
+	return ret;
+}
+
+static int dualshock4_get_firmware_info(struct dualshock4 *ds4)
+{
+	uint8_t *buf;
+	int ret;
+
+	buf = kzalloc(DS4_FEATURE_REPORT_FIRMWARE_INFO_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	/* Note USB and BT support the same feature report, but this report
+	 * lacks CRC support, so must be disabled in ps_get_report.
+	 */
+	ret = ps_get_report(ds4->base.hdev, DS4_FEATURE_REPORT_FIRMWARE_INFO, buf,
+			DS4_FEATURE_REPORT_FIRMWARE_INFO_SIZE, false);
+	if (ret) {
+		hid_err(ds4->base.hdev, "Failed to retrieve DualShock4 firmware info: %d\n", ret);
+		goto err_free;
+	}
+
+	ds4->base.hw_version = get_unaligned_le16(&buf[35]);
+	ds4->base.fw_version = get_unaligned_le16(&buf[41]);
+
+err_free:
+	kfree(buf);
+	return ret;
+}
+
+static int dualshock4_get_mac_address(struct dualshock4 *ds4)
+{
+	struct hid_device *hdev = ds4->base.hdev;
+	uint8_t *buf;
+	int ret = 0;
+
+	if (hdev->bus == BUS_USB) {
+		buf = kzalloc(DS4_FEATURE_REPORT_PAIRING_INFO_SIZE, GFP_KERNEL);
+		if (!buf)
+			return -ENOMEM;
+
+		ret = ps_get_report(hdev, DS4_FEATURE_REPORT_PAIRING_INFO, buf,
+				DS4_FEATURE_REPORT_PAIRING_INFO_SIZE, false);
+		if (ret) {
+			hid_err(hdev, "Failed to retrieve DualShock4 pairing info: %d\n", ret);
+			goto err_free;
+		}
+
+		memcpy(ds4->base.mac_address, &buf[1], sizeof(ds4->base.mac_address));
+	} else {
+		/* Rely on HIDP for Bluetooth */
+		if (strlen(hdev->uniq) != 17)
+			return -EINVAL;
+
+		ret = sscanf(hdev->uniq, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+				&ds4->base.mac_address[5], &ds4->base.mac_address[4],
+				&ds4->base.mac_address[3], &ds4->base.mac_address[2],
+				&ds4->base.mac_address[1], &ds4->base.mac_address[0]);
+
+		if (ret != sizeof(ds4->base.mac_address))
+			return -EINVAL;
+
+		ret = 0;
+	}
+
+err_free:
+	kfree(buf);
+	return ret;
+}
+
+static enum led_brightness dualshock4_led_get_brightness(struct led_classdev *led)
+{
+	struct hid_device *hdev = to_hid_device(led->dev->parent);
+	struct dualshock4 *ds4 = hid_get_drvdata(hdev);
+	unsigned int led_index;
+
+	led_index = led - ds4->lightbar_leds;
+	switch (led_index) {
+	case 0:
+		return ds4->lightbar_red;
+	case 1:
+		return ds4->lightbar_green;
+	case 2:
+		return ds4->lightbar_blue;
+	case 3:
+		return ds4->lightbar_enabled;
+	}
+
+	return -1;
+}
+
+static int dualshock4_led_set_blink(struct led_classdev *led, unsigned long *delay_on,
+		unsigned long *delay_off)
+{
+	struct hid_device *hdev = to_hid_device(led->dev->parent);
+	struct dualshock4 *ds4 = hid_get_drvdata(hdev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&ds4->base.lock, flags);
+
+	if (!*delay_on && !*delay_off) {
+		/* Default to 1 Hz (50 centiseconds on, 50 centiseconds off). */
+		ds4->lightbar_blink_on = 50;
+		ds4->lightbar_blink_off = 50;
+	} else {
+		/* Blink delays in centiseconds. */
+		ds4->lightbar_blink_on = min_t(unsigned long, *delay_on/10, DS4_LIGHTBAR_MAX_BLINK);
+		ds4->lightbar_blink_off = min_t(unsigned long, *delay_off/10, DS4_LIGHTBAR_MAX_BLINK);
+	}
+
+	ds4->update_lightbar_blink = true;
+
+	spin_unlock_irqrestore(&ds4->base.lock, flags);
+
+	dualshock4_schedule_work(ds4);
+
+	*delay_on = ds4->lightbar_blink_on;
+	*delay_off = ds4->lightbar_blink_off;
+
+	return 0;
+}
+
+static int dualshock4_led_set_brightness(struct led_classdev *led, enum led_brightness value)
+{
+	struct hid_device *hdev = to_hid_device(led->dev->parent);
+	struct dualshock4 *ds4 = hid_get_drvdata(hdev);
+	unsigned long flags;
+	unsigned int led_index;
+
+	spin_lock_irqsave(&ds4->base.lock, flags);
+
+	led_index = led - ds4->lightbar_leds;
+	switch (led_index) {
+	case 0:
+		ds4->lightbar_red = value;
+		break;
+	case 1:
+		ds4->lightbar_green = value;
+		break;
+	case 2:
+		ds4->lightbar_blue = value;
+		break;
+	case 3:
+		ds4->lightbar_enabled = !!value;
+	}
+
+	ds4->update_lightbar = true;
+
+	spin_unlock_irqrestore(&ds4->base.lock, flags);
+
+	dualshock4_schedule_work(ds4);
+
+	return 0;
+}
+
+static void dualshock4_init_output_report(struct dualshock4 *ds4,
+		struct dualshock4_output_report *rp, void *buf)
+{
+	struct hid_device *hdev = ds4->base.hdev;
+
+	if (hdev->bus == BUS_BLUETOOTH) {
+		struct dualshock4_output_report_bt *bt = buf;
+
+		memset(bt, 0, sizeof(*bt));
+		bt->report_id = DS4_OUTPUT_REPORT_BT;
+
+		rp->data = buf;
+		rp->len = sizeof(*bt);
+		rp->bt = bt;
+		rp->usb = NULL;
+		rp->common = &bt->common;
+	} else { /* USB */
+		struct dualshock4_output_report_usb *usb = buf;
+
+		memset(usb, 0, sizeof(*usb));
+		usb->report_id = DS4_OUTPUT_REPORT_USB;
+
+		rp->data = buf;
+		rp->len = sizeof(*usb);
+		rp->bt = NULL;
+		rp->usb = usb;
+		rp->common = &usb->common;
+	}
+}
+
+static void dualshock4_output_worker(struct work_struct *work)
+{
+	struct dualshock4 *ds4 = container_of(work, struct dualshock4, output_worker);
+	struct dualshock4_output_report report;
+	struct dualshock4_output_report_common *common;
+	unsigned long flags;
+
+	dualshock4_init_output_report(ds4, &report, ds4->output_report_dmabuf);
+	common = report.common;
+
+	spin_lock_irqsave(&ds4->base.lock, flags);
+
+	if (ds4->update_rumble) {
+		/* Select classic rumble style haptics and enable it. */
+		common->valid_flag0 |= DS4_OUTPUT_VALID_FLAG0_MOTOR;
+		common->motor_left = ds4->motor_left;
+		common->motor_right = ds4->motor_right;
+		ds4->update_rumble = false;
+	}
+
+	if (ds4->update_lightbar) {
+		common->valid_flag0 |= DS4_OUTPUT_VALID_FLAG0_LED;
+		/* Comptabile behavior with hid-sony, which used a dummy global LED to
+		 * allow enabling/disabling the lightbar. The global LED maps to
+		 * lightbar_enabled.
+		 */
+		common->lightbar_red = ds4->lightbar_enabled ? ds4->lightbar_red : 0;
+		common->lightbar_green = ds4->lightbar_enabled ? ds4->lightbar_green : 0;
+		common->lightbar_blue = ds4->lightbar_enabled ? ds4->lightbar_blue : 0;
+		ds4->update_lightbar = false;
+	}
+
+	if (ds4->update_lightbar_blink) {
+		common->valid_flag0 |= DS4_OUTPUT_VALID_FLAG0_LED_BLINK;
+		common->lightbar_blink_on = ds4->lightbar_blink_on;
+		common->lightbar_blink_off = ds4->lightbar_blink_off;
+		ds4->update_lightbar_blink = false;
+	}
+
+	spin_unlock_irqrestore(&ds4->base.lock, flags);
+
+	/* Bluetooth packets need additional flags as well as a CRC in the last 4 bytes. */
+	if (report.bt) {
+		uint32_t crc;
+		uint8_t seed = PS_OUTPUT_CRC32_SEED;
+
+		/* Hardware control flags need to set to let the device know
+		 * there is HID data as well as CRC.
+		 */
+		report.bt->hw_control = DS4_OUTPUT_HWCTL_HID | DS4_OUTPUT_HWCTL_CRC32;
+
+		if (ds4->update_bt_poll_interval) {
+			report.bt->hw_control |= ds4->bt_poll_interval;
+			ds4->update_bt_poll_interval = false;
+		}
+
+		crc = crc32_le(0xFFFFFFFF, &seed, 1);
+		crc = ~crc32_le(crc, report.data, report.len - 4);
+
+		report.bt->crc32 = cpu_to_le32(crc);
+	}
+
+	hid_hw_output_report(ds4->base.hdev, report.data, report.len);
+}
+
+static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *report,
+		u8 *data, int size)
+{
+	struct hid_device *hdev = ps_dev->hdev;
+	struct dualshock4 *ds4 = container_of(ps_dev, struct dualshock4, base);
+	struct dualshock4_input_report_common *ds4_report;
+	struct dualshock4_touch_report *touch_reports;
+	uint8_t battery_capacity, num_touch_reports, value;
+	int battery_status, i, j;
+	uint16_t sensor_timestamp;
+	unsigned long flags;
+
+	/*
+	 * DualShock4 in USB uses the full HID report for reportID 1, but
+	 * Bluetooth uses a minimal HID report for reportID 1 and reports
+	 * the full report using reportID 17.
+	 */
+	if (hdev->bus == BUS_USB && report->id == DS4_INPUT_REPORT_USB &&
+			size == DS4_INPUT_REPORT_USB_SIZE) {
+		struct dualshock4_input_report_usb *usb = (struct dualshock4_input_report_usb *)data;
+
+		ds4_report = &usb->common;
+		num_touch_reports = usb->num_touch_reports;
+		touch_reports = usb->touch_reports;
+	} else if (hdev->bus == BUS_BLUETOOTH && report->id == DS4_INPUT_REPORT_BT &&
+			size == DS4_INPUT_REPORT_BT_SIZE) {
+		struct dualshock4_input_report_bt *bt = (struct dualshock4_input_report_bt *)data;
+		uint32_t report_crc = get_unaligned_le32(&bt->crc32);
+
+		/* Last 4 bytes of input report contains CRC. */
+		if (!ps_check_crc32(PS_INPUT_CRC32_SEED, data, size - 4, report_crc)) {
+			hid_err(hdev, "DualShock4 input CRC's check failed\n");
+			return -EILSEQ;
+		}
+
+		ds4_report = &bt->common;
+		num_touch_reports = bt->num_touch_reports;
+		touch_reports = bt->touch_reports;
+	} else {
+		hid_err(hdev, "Unhandled reportID=%d\n", report->id);
+		return -1;
+	}
+
+	input_report_abs(ds4->gamepad, ABS_X,  ds4_report->x);
+	input_report_abs(ds4->gamepad, ABS_Y,  ds4_report->y);
+	input_report_abs(ds4->gamepad, ABS_RX, ds4_report->rx);
+	input_report_abs(ds4->gamepad, ABS_RY, ds4_report->ry);
+	input_report_abs(ds4->gamepad, ABS_Z,  ds4_report->z);
+	input_report_abs(ds4->gamepad, ABS_RZ, ds4_report->rz);
+
+	value = ds4_report->buttons[0] & DS_BUTTONS0_HAT_SWITCH;
+	if (value >= ARRAY_SIZE(ps_gamepad_hat_mapping))
+		value = 8; /* center */
+	input_report_abs(ds4->gamepad, ABS_HAT0X, ps_gamepad_hat_mapping[value].x);
+	input_report_abs(ds4->gamepad, ABS_HAT0Y, ps_gamepad_hat_mapping[value].y);
+
+	input_report_key(ds4->gamepad, BTN_WEST,   ds4_report->buttons[0] & DS_BUTTONS0_SQUARE);
+	input_report_key(ds4->gamepad, BTN_SOUTH,  ds4_report->buttons[0] & DS_BUTTONS0_CROSS);
+	input_report_key(ds4->gamepad, BTN_EAST,   ds4_report->buttons[0] & DS_BUTTONS0_CIRCLE);
+	input_report_key(ds4->gamepad, BTN_NORTH,  ds4_report->buttons[0] & DS_BUTTONS0_TRIANGLE);
+	input_report_key(ds4->gamepad, BTN_TL,     ds4_report->buttons[1] & DS_BUTTONS1_L1);
+	input_report_key(ds4->gamepad, BTN_TR,     ds4_report->buttons[1] & DS_BUTTONS1_R1);
+	input_report_key(ds4->gamepad, BTN_TL2,    ds4_report->buttons[1] & DS_BUTTONS1_L2);
+	input_report_key(ds4->gamepad, BTN_TR2,    ds4_report->buttons[1] & DS_BUTTONS1_R2);
+	input_report_key(ds4->gamepad, BTN_SELECT, ds4_report->buttons[1] & DS_BUTTONS1_CREATE);
+	input_report_key(ds4->gamepad, BTN_START,  ds4_report->buttons[1] & DS_BUTTONS1_OPTIONS);
+	input_report_key(ds4->gamepad, BTN_THUMBL, ds4_report->buttons[1] & DS_BUTTONS1_L3);
+	input_report_key(ds4->gamepad, BTN_THUMBR, ds4_report->buttons[1] & DS_BUTTONS1_R3);
+	input_report_key(ds4->gamepad, BTN_MODE,   ds4_report->buttons[2] & DS_BUTTONS2_PS_HOME);
+	input_sync(ds4->gamepad);
+
+	/* Parse and calibrate gyroscope data. */
+	for (i = 0; i < ARRAY_SIZE(ds4_report->gyro); i++) {
+		int raw_data = (short)le16_to_cpu(ds4_report->gyro[i]);
+		int calib_data = mult_frac(ds4->gyro_calib_data[i].sens_numer,
+					   raw_data - ds4->gyro_calib_data[i].bias,
+					   ds4->gyro_calib_data[i].sens_denom);
+
+		input_report_abs(ds4->sensors, ds4->gyro_calib_data[i].abs_code, calib_data);
+	}
+
+	/* Parse and calibrate accelerometer data. */
+	for (i = 0; i < ARRAY_SIZE(ds4_report->accel); i++) {
+		int raw_data = (short)le16_to_cpu(ds4_report->accel[i]);
+		int calib_data = mult_frac(ds4->accel_calib_data[i].sens_numer,
+					   raw_data - ds4->accel_calib_data[i].bias,
+					   ds4->accel_calib_data[i].sens_denom);
+
+		input_report_abs(ds4->sensors, ds4->accel_calib_data[i].abs_code, calib_data);
+	}
+
+	/* Convert timestamp (in 5.33us unit) to timestamp_us */
+	sensor_timestamp = le16_to_cpu(ds4_report->sensor_timestamp);
+	if (!ds4->sensor_timestamp_initialized) {
+		ds4->sensor_timestamp_us = DIV_ROUND_CLOSEST(sensor_timestamp*16, 3);
+		ds4->sensor_timestamp_initialized = true;
+	} else {
+		uint16_t delta;
+
+		if (ds4->prev_sensor_timestamp > sensor_timestamp)
+			delta = (U16_MAX - ds4->prev_sensor_timestamp + sensor_timestamp + 1);
+		else
+			delta = sensor_timestamp - ds4->prev_sensor_timestamp;
+		ds4->sensor_timestamp_us += DIV_ROUND_CLOSEST(delta*16, 3);
+	}
+	ds4->prev_sensor_timestamp = sensor_timestamp;
+	input_event(ds4->sensors, EV_MSC, MSC_TIMESTAMP, ds4->sensor_timestamp_us);
+	input_sync(ds4->sensors);
+
+	for (i = 0; i < num_touch_reports; i++) {
+		struct dualshock4_touch_report *touch_report = &touch_reports[i];
+
+		for (j = 0; j < ARRAY_SIZE(touch_report->points); j++) {
+			struct dualshock4_touch_point *point = &touch_report->points[j];
+			bool active = (point->contact & DS4_TOUCH_POINT_INACTIVE) ? false : true;
+
+			input_mt_slot(ds4->touchpad, j);
+			input_mt_report_slot_state(ds4->touchpad, MT_TOOL_FINGER, active);
+
+			if (active) {
+				int x = (point->x_hi << 8) | point->x_lo;
+				int y = (point->y_hi << 4) | point->y_lo;
+
+				input_report_abs(ds4->touchpad, ABS_MT_POSITION_X, x);
+				input_report_abs(ds4->touchpad, ABS_MT_POSITION_Y, y);
+			}
+		}
+		input_mt_sync_frame(ds4->touchpad);
+		input_sync(ds4->touchpad);
+	}
+	input_report_key(ds4->touchpad, BTN_LEFT, ds4_report->buttons[2] & DS_BUTTONS2_TOUCHPAD);
+
+	/*
+	 * Interpretation of the battery_capacity data depends on the cable state.
+	 * When no cable is connected (bit4 is 0):
+	 * - 0:10: percentage in units of 10%.
+	 * When a cable is plugged in:
+	 * - 0-10: percentage in units of 10%.
+	 * - 11: battery is full
+	 * - 14: not charging due to Voltage or temperature error
+	 * - 15: charge error
+	 */
+	if (ds4_report->status[0] & DS4_STATUS0_CABLE_STATE) {
+		uint8_t battery_data = ds4_report->status[0] & DS4_STATUS0_BATTERY_CAPACITY;
+
+		if (battery_data < 10) {
+			/* Take the mid-point for each battery capacity value,
+			 * because on the hardware side 0 = 0-9%, 1=10-19%, etc.
+			 * This matches official platform behavior, which does
+			 * the same.
+			 */
+			battery_capacity = battery_data * 10 + 5;
+			battery_status = POWER_SUPPLY_STATUS_CHARGING;
+		} else if (battery_data == 10) {
+			battery_capacity = 100;
+			battery_status = POWER_SUPPLY_STATUS_CHARGING;
+		} else if (battery_data == DS4_BATTERY_STATUS_FULL) {
+			battery_capacity = 100;
+			battery_status = POWER_SUPPLY_STATUS_FULL;
+		} else { /* 14, 15 and undefined values */
+			battery_capacity = 0;
+			battery_status = POWER_SUPPLY_STATUS_UNKNOWN;
+		}
+	} else {
+		uint8_t battery_data = ds4_report->status[0] & DS4_STATUS0_BATTERY_CAPACITY;
+
+		if (battery_data < 10)
+			battery_capacity = battery_data * 10 + 5;
+		else /* 10 */
+			battery_capacity = 100;
+
+		battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
+	}
+
+	spin_lock_irqsave(&ps_dev->lock, flags);
+	ps_dev->battery_capacity = battery_capacity;
+	ps_dev->battery_status = battery_status;
+	spin_unlock_irqrestore(&ps_dev->lock, flags);
+
+	return 0;
+}
+
+static int dualshock4_dongle_parse_report(struct ps_device *ps_dev, struct hid_report *report,
+		u8 *data, int size)
+{
+	struct dualshock4 *ds4 = container_of(ps_dev, struct dualshock4, base);
+	bool connected = false;
+
+	/* The dongle reports data using the main USB report (0x1) no matter whether a controller
+	 * is connected with mostly zeros. The report does contain dongle status, which we use to
+	 * determine if a controller is connected and if so we forward to the regular DualShock4
+	 * parsing code.
+	 */
+	if (data[0] == DS4_INPUT_REPORT_USB && size == DS4_INPUT_REPORT_USB_SIZE) {
+		struct dualshock4_input_report_common *ds4_report = (struct dualshock4_input_report_common *)&data[1];
+		unsigned long flags;
+
+		connected = ds4_report->status[1] & DS4_STATUS1_DONGLE_STATE ? false : true;
+
+		if (ds4->dongle_state == DONGLE_DISCONNECTED && connected) {
+			hid_info(ps_dev->hdev, "DualShock 4 USB dongle: controller connected\n");
+
+			dualshock4_set_default_lightbar_colors(ds4);
+
+			spin_lock_irqsave(&ps_dev->lock, flags);
+			ds4->dongle_state = DONGLE_CALIBRATING;
+			spin_unlock_irqrestore(&ps_dev->lock, flags);
+
+			schedule_work(&ds4->dongle_hotplug_worker);
+
+			/* Don't process the report since we don't have
+			 * calibration data, but let hidraw have it anyway.
+			 */
+			return 0;
+		} else if ((ds4->dongle_state == DONGLE_CONNECTED ||
+			    ds4->dongle_state == DONGLE_DISABLED) && !connected) {
+			hid_info(ps_dev->hdev, "DualShock 4 USB dongle: controller disconnected\n");
+
+			spin_lock_irqsave(&ps_dev->lock, flags);
+			ds4->dongle_state = DONGLE_DISCONNECTED;
+			spin_unlock_irqrestore(&ps_dev->lock, flags);
+
+			/* Return 0, so hidraw can get the report. */
+			return 0;
+		} else if (ds4->dongle_state == DONGLE_CALIBRATING ||
+			   ds4->dongle_state == DONGLE_DISABLED ||
+			   ds4->dongle_state == DONGLE_DISCONNECTED) {
+			/* Return 0, so hidraw can get the report. */
+			return 0;
+		}
+	}
+
+	if (connected)
+		return dualshock4_parse_report(ps_dev, report, data, size);
+
+	return 0;
+}
+
+static int dualshock4_play_effect(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+	struct hid_device *hdev = input_get_drvdata(dev);
+	struct dualshock4 *ds4 = hid_get_drvdata(hdev);
+	unsigned long flags;
+
+	if (effect->type != FF_RUMBLE)
+		return 0;
+
+	spin_lock_irqsave(&ds4->base.lock, flags);
+	ds4->update_rumble = true;
+	ds4->motor_left = effect->u.rumble.strong_magnitude / 256;
+	ds4->motor_right = effect->u.rumble.weak_magnitude / 256;
+	spin_unlock_irqrestore(&ds4->base.lock, flags);
+
+	dualshock4_schedule_work(ds4);
+	return 0;
+}
+
+static void dualshock4_remove(struct ps_device *ps_dev)
+{
+	struct dualshock4 *ds4 = container_of(ps_dev, struct dualshock4, base);
+	unsigned long flags;
+
+	spin_lock_irqsave(&ds4->base.lock, flags);
+	ds4->output_worker_initialized = false;
+	spin_unlock_irqrestore(&ds4->base.lock, flags);
+
+	cancel_work_sync(&ds4->output_worker);
+
+	if (ps_dev->hdev->product == USB_DEVICE_ID_SONY_PS4_CONTROLLER_DONGLE)
+		cancel_work_sync(&ds4->dongle_hotplug_worker);
+}
+
+static inline void dualshock4_schedule_work(struct dualshock4 *ds4)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ds4->base.lock, flags);
+	if (ds4->output_worker_initialized)
+		schedule_work(&ds4->output_worker);
+	spin_unlock_irqrestore(&ds4->base.lock, flags);
+}
+
+static void dualshock4_set_bt_poll_interval(struct dualshock4 *ds4, uint8_t interval)
+{
+	ds4->bt_poll_interval = interval;
+	ds4->update_bt_poll_interval = true;
+	dualshock4_schedule_work(ds4);
+}
+
+/* Set default lightbar color based on player. */
+static void dualshock4_set_default_lightbar_colors(struct dualshock4 *ds4)
+{
+	/* Use same player colors as PlayStation 4.
+	 * Array of colors is in RGB.
+	 */
+	static const int player_colors[4][3] = {
+		{ 0x00, 0x00, 0x40 }, /* Blue */
+		{ 0x40, 0x00, 0x00 }, /* Red */
+		{ 0x00, 0x40, 0x00 }, /* Green */
+		{ 0x20, 0x00, 0x20 }  /* Pink */
+	};
+
+	uint8_t player_id = ds4->base.player_id % ARRAY_SIZE(player_colors);
+
+	ds4->lightbar_enabled = true;
+	ds4->lightbar_red = player_colors[player_id][0];
+	ds4->lightbar_green = player_colors[player_id][1];
+	ds4->lightbar_blue = player_colors[player_id][2];
+
+	ds4->update_lightbar = true;
+	dualshock4_schedule_work(ds4);
+}
+
+static struct ps_device *dualshock4_create(struct hid_device *hdev)
+{
+	struct dualshock4 *ds4;
+	struct ps_device *ps_dev;
+	uint8_t max_output_report_size;
+	int i, ret;
+
+	/* The DualShock4 has an RGB lightbar, which the original hid-sony driver
+	 * exposed as a set of 4 LEDs for the 3 color channels and a global control.
+	 * Ideally this should have used the multi-color LED class, which didn't exist
+	 * yet. In addition the driver used a naming scheme not compliant with the LED
+	 * naming spec by using "<mac_address>:<color>", which contained many colons.
+	 * We use a more compliant by using "<device_name>:<color>" name now. Ideally
+	 * would have been "<device_name>:<color>:indicator", but that would break
+	 * existing applications (e.g. Android). Nothing matches against MAC address.
+	 */
+	static const struct ps_led_info lightbar_leds_info[] = {
+		{ NULL, "red", 255, dualshock4_led_get_brightness, dualshock4_led_set_brightness },
+		{ NULL, "green", 255, dualshock4_led_get_brightness, dualshock4_led_set_brightness },
+		{ NULL, "blue", 255, dualshock4_led_get_brightness, dualshock4_led_set_brightness },
+		{ NULL, "global", 1, dualshock4_led_get_brightness, dualshock4_led_set_brightness,
+				dualshock4_led_set_blink },
+	};
+
+	ds4 = devm_kzalloc(&hdev->dev, sizeof(*ds4), GFP_KERNEL);
+	if (!ds4)
+		return ERR_PTR(-ENOMEM);
+
+	/*
+	 * Patch version to allow userspace to distinguish between
+	 * hid-generic vs hid-playstation axis and button mapping.
+	 */
+	hdev->version |= HID_PLAYSTATION_VERSION_PATCH;
+
+	ps_dev = &ds4->base;
+	ps_dev->hdev = hdev;
+	spin_lock_init(&ps_dev->lock);
+	ps_dev->battery_capacity = 100; /* initial value until parse_report. */
+	ps_dev->battery_status = POWER_SUPPLY_STATUS_UNKNOWN;
+	ps_dev->parse_report = dualshock4_parse_report;
+	ps_dev->remove = dualshock4_remove;
+	INIT_WORK(&ds4->output_worker, dualshock4_output_worker);
+	ds4->output_worker_initialized = true;
+	hid_set_drvdata(hdev, ds4);
+
+	max_output_report_size = sizeof(struct dualshock4_output_report_bt);
+	ds4->output_report_dmabuf = devm_kzalloc(&hdev->dev, max_output_report_size, GFP_KERNEL);
+	if (!ds4->output_report_dmabuf)
+		return ERR_PTR(-ENOMEM);
+
+	if (hdev->product == USB_DEVICE_ID_SONY_PS4_CONTROLLER_DONGLE) {
+		ds4->dongle_state = DONGLE_DISCONNECTED;
+		INIT_WORK(&ds4->dongle_hotplug_worker, dualshock4_dongle_calibration_work);
+
+		/* Override parse report for dongle specific hotplug handling. */
+		ps_dev->parse_report = dualshock4_dongle_parse_report;
+	}
+
+	ret = dualshock4_get_mac_address(ds4);
+	if (ret) {
+		hid_err(hdev, "Failed to get MAC address from DualShock4\n");
+		return ERR_PTR(ret);
+	}
+	snprintf(hdev->uniq, sizeof(hdev->uniq), "%pMR", ds4->base.mac_address);
+
+	ret = dualshock4_get_firmware_info(ds4);
+	if (ret) {
+		hid_err(hdev, "Failed to get firmware info from DualShock4\n");
+		return ERR_PTR(ret);
+	}
+
+	ret = ps_devices_list_add(ps_dev);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ret = dualshock4_get_calibration_data(ds4);
+	if (ret) {
+		hid_err(hdev, "Failed to get calibration data from DualShock4\n");
+		goto err;
+	}
+
+	ds4->gamepad = ps_gamepad_create(hdev, dualshock4_play_effect);
+	if (IS_ERR(ds4->gamepad)) {
+		ret = PTR_ERR(ds4->gamepad);
+		goto err;
+	}
+
+	/* Use gamepad input device name as primary device name for e.g. LEDs */
+	ps_dev->input_dev_name = dev_name(&ds4->gamepad->dev);
+
+	ds4->sensors = ps_sensors_create(hdev, DS4_ACC_RANGE, DS4_ACC_RES_PER_G,
+			DS4_GYRO_RANGE, DS4_GYRO_RES_PER_DEG_S);
+	if (IS_ERR(ds4->sensors)) {
+		ret = PTR_ERR(ds4->sensors);
+		goto err;
+	}
+
+	ds4->touchpad = ps_touchpad_create(hdev, DS4_TOUCHPAD_WIDTH, DS4_TOUCHPAD_HEIGHT, 2);
+	if (IS_ERR(ds4->touchpad)) {
+		ret = PTR_ERR(ds4->touchpad);
+		goto err;
+	}
+
+	ret = ps_device_register_battery(ps_dev);
+	if (ret)
+		goto err;
+
+	for (i = 0; i < ARRAY_SIZE(lightbar_leds_info); i++) {
+		const struct ps_led_info *led_info = &lightbar_leds_info[i];
+
+		ret = ps_led_register(ps_dev, &ds4->lightbar_leds[i], led_info);
+		if (ret < 0)
+			goto err;
+	}
+
+	dualshock4_set_bt_poll_interval(ds4, DS4_BT_DEFAULT_POLL_INTERVAL_MS);
+
+	ret = ps_device_set_player_id(ps_dev);
+	if (ret) {
+		hid_err(hdev, "Failed to assign player id for DualShock4: %d\n", ret);
+		goto err;
+	}
+
+	dualshock4_set_default_lightbar_colors(ds4);
+
+	/*
+	 * Reporting hardware and firmware is important as there are frequent updates, which
+	 * can change behavior.
+	 */
+	hid_info(hdev, "Registered DualShock4 controller hw_version=0x%08x fw_version=0x%08x\n",
+			ds4->base.hw_version, ds4->base.fw_version);
+	return &ds4->base;
+
+err:
+	ps_devices_list_remove(ps_dev);
+	return ERR_PTR(ret);
+}
+
 static int ps_raw_event(struct hid_device *hdev, struct hid_report *report,
 		u8 *data, int size)
 {
···
 		goto err_stop;
 	}
 
-	if (hdev->product == USB_DEVICE_ID_SONY_PS5_CONTROLLER ||
+	if (hdev->product == USB_DEVICE_ID_SONY_PS4_CONTROLLER ||
+		hdev->product == USB_DEVICE_ID_SONY_PS4_CONTROLLER_2 ||
+		hdev->product == USB_DEVICE_ID_SONY_PS4_CONTROLLER_DONGLE) {
+		dev = dualshock4_create(hdev);
+		if (IS_ERR(dev)) {
+			hid_err(hdev, "Failed to create dualshock4.\n");
+			ret = PTR_ERR(dev);
+			goto err_close;
+		}
+	} else if (hdev->product == USB_DEVICE_ID_SONY_PS5_CONTROLLER ||
 		hdev->product == USB_DEVICE_ID_SONY_PS5_CONTROLLER_2) {
 		dev = dualsense_create(hdev);
 		if (IS_ERR(dev)) {
···
 }
 
 static const struct hid_device_id ps_devices[] = {
+	/* Sony DualShock 4 controllers for PS4 */
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER_2) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER_2) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER_DONGLE) },
+	/* Sony DualSense controllers for PS5 */
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS5_CONTROLLER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS5_CONTROLLER) },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS5_CONTROLLER_2) },

drivers/hid/hid-rmi.c

···
 	if (!(test_bit(RMI_STARTED, &hdata->flags)))
 		return 0;
 
+	pm_wakeup_event(hdev->dev.parent, 0);
+
 	local_irq_save(flags);
 
 	rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2);

drivers/hid/hid-sensor-custom.c

···
 	u32 raw_len;
 } __packed;
 
-static struct attribute hid_custom_attrs[] = {
+static struct attribute hid_custom_attrs[HID_CUSTOM_TOTAL_ATTRS] = {
 	{.name = "name", .mode = S_IRUGO},
 	{.name = "units", .mode = S_IRUGO},
 	{.name = "unit-expo", .mode = S_IRUGO},
···
 		return ERR_PTR(-ENOMEM);
 
 	custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name,
-						    PLATFORM_DEVID_NONE, hsdev,
+						    PLATFORM_DEVID_AUTO, hsdev,
 						    sizeof(*hsdev));
 	kfree(dev_name);
 	return custom_pdev;

drivers/hid/hid-uclogic-params-test.c

···
 KUNIT_ARRAY_PARAM(uclogic_parse_ugee_v2_desc, uclogic_parse_ugee_v2_desc_cases,
 		  uclogic_parse_ugee_v2_desc_case_desc);
 
-static void uclogic_parse_ugee_v2_desc_test(struct kunit *test)
+static void hid_test_uclogic_parse_ugee_v2_desc(struct kunit *test)
 {
 	int res;
 	s32 desc_params[UCLOGIC_RDESC_PH_ID_NUM];
···
 }
 
 static struct kunit_case hid_uclogic_params_test_cases[] = {
-	KUNIT_CASE_PARAM(uclogic_parse_ugee_v2_desc_test,
+	KUNIT_CASE_PARAM(hid_test_uclogic_parse_ugee_v2_desc,
 			 uclogic_parse_ugee_v2_desc_gen_params),
 	{}
 };

drivers/hid/hid-uclogic-params.c

···
 #include "usbhid/usbhid.h"
 #include "hid-ids.h"
 #include <linux/ctype.h>
+#include <linux/string.h>
 #include <asm/unaligned.h>
 
 /**
···
 }
 
 /**
+ * uclogic_params_ugee_v2_has_battery() - check whether a UGEE v2 device has
+ * battery or not.
+ * @hdev:	The HID device of the tablet interface.
+ *
+ * Returns:
+ *	True if the device has battery, false otherwise.
+ */
+static bool uclogic_params_ugee_v2_has_battery(struct hid_device *hdev)
+{
+	/* The XP-PEN Deco LW vendor, product and version are identical to the
+	 * Deco L. The only difference reported by their firmware is the product
+	 * name. Add a quirk to support battery reporting on the wireless
+	 * version.
+	 */
+	if (hdev->vendor == USB_VENDOR_ID_UGEE &&
+	    hdev->product == USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L) {
+		struct usb_device *udev = hid_to_usb_dev(hdev);
+
+		if (strstarts(udev->product, "Deco LW"))
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * uclogic_params_ugee_v2_init_battery() - initialize UGEE v2 battery reporting.
+ * @hdev:	The HID device of the tablet interface, cannot be NULL.
+ * @p:		Parameters to fill in, cannot be NULL.
+ *
+ * Returns:
+ *	Zero, if successful. A negative errno code on error.
+ */
+static int uclogic_params_ugee_v2_init_battery(struct hid_device *hdev,
+					       struct uclogic_params *p)
+{
+	int rc = 0;
+
+	if (!hdev || !p)
+		return -EINVAL;
+
+	/* Some tablets contain invalid characters in hdev->uniq, throwing a
+	 * "hwmon: '<name>' is not a valid name attribute, please fix" error.
+	 * Use the device vendor and product IDs instead.
+	 */
+	snprintf(hdev->uniq, sizeof(hdev->uniq), "%x-%x", hdev->vendor,
+		 hdev->product);
+
+	rc = uclogic_params_frame_init_with_desc(&p->frame_list[1],
+						 uclogic_rdesc_ugee_v2_battery_template_arr,
+						 uclogic_rdesc_ugee_v2_battery_template_size,
+						 UCLOGIC_RDESC_UGEE_V2_BATTERY_ID);
+	if (rc)
+		return rc;
+
+	p->frame_list[1].suffix = "Battery";
+	p->pen.subreport_list[1].value = 0xf2;
+	p->pen.subreport_list[1].id = UCLOGIC_RDESC_UGEE_V2_BATTERY_ID;
+
+	return rc;
+}
+
+/**
  * uclogic_params_ugee_v2_init() - initialize a UGEE graphics tablets by
  * discovering their parameters.
  *
···
 
 	if (rc)
 		goto cleanup;
+
+	/* Initialize the battery interface*/
+	if (uclogic_params_ugee_v2_has_battery(hdev)) {
+		rc = uclogic_params_ugee_v2_init_battery(hdev, &p);
+		if (rc) {
+			hid_err(hdev, "error initializing battery: %d\n", rc);
+			goto cleanup;
+		}
+	}
 
 output:
 	/* Output parameters */

drivers/hid/hid-uclogic-rdesc-test.c

···
 KUNIT_ARRAY_PARAM(uclogic_template, uclogic_template_cases,
 		  uclogic_template_case_desc);
 
-static void uclogic_template_test(struct kunit *test)
+static void hid_test_uclogic_template(struct kunit *test)
 {
 	__u8 *res;
 	const struct uclogic_template_case *params = test->param_value;
···
 }
 
 static struct kunit_case hid_uclogic_rdesc_test_cases[] = {
-	KUNIT_CASE_PARAM(uclogic_template_test, uclogic_template_gen_params),
+	KUNIT_CASE_PARAM(hid_test_uclogic_template, uclogic_template_gen_params),
 	{}
 };
 

drivers/hid/hid-uclogic-rdesc.c

···
 const size_t uclogic_rdesc_ugee_v2_frame_mouse_template_size =
 			sizeof(uclogic_rdesc_ugee_v2_frame_mouse_template_arr);
 
+/* Fixed report descriptor template for UGEE v2 battery reports */
+const __u8 uclogic_rdesc_ugee_v2_battery_template_arr[] = {
+	0x05, 0x01,         /*  Usage Page (Desktop),                   */
+	0x09, 0x07,         /*  Usage (Keypad),                         */
+	0xA1, 0x01,         /*  Collection (Application),               */
+	0x85, UCLOGIC_RDESC_UGEE_V2_BATTERY_ID,
+			    /*      Report ID,                          */
+	0x75, 0x08,         /*      Report Size (8),                    */
+	0x95, 0x02,         /*      Report Count (2),                   */
+	0x81, 0x01,         /*      Input (Constant),                   */
+	0x05, 0x84,         /*      Usage Page (Power Device),          */
+	0x05, 0x85,         /*      Usage Page (Battery System),        */
+	0x09, 0x65,         /*      Usage Page (AbsoluteStateOfCharge), */
+	0x75, 0x08,         /*      Report Size (8),                    */
+	0x95, 0x01,         /*      Report Count (1),                   */
+	0x15, 0x00,         /*      Logical Minimum (0),                */
+	0x26, 0xff, 0x00,   /*      Logical Maximum (255),              */
+	0x81, 0x02,         /*      Input (Variable),                   */
+	0x75, 0x01,         /*      Report Size (1),                    */
+	0x95, 0x01,         /*      Report Count (1),                   */
+	0x15, 0x00,         /*      Logical Minimum (0),                */
+	0x25, 0x01,         /*      Logical Maximum (1),                */
+	0x09, 0x44,         /*      Usage Page (Charging),              */
+	0x81, 0x02,         /*      Input (Variable),                   */
+	0x95, 0x07,         /*      Report Count (7),                   */
+	0x81, 0x01,         /*      Input (Constant),                   */
+	0x75, 0x08,         /*      Report Size (8),                    */
+	0x95, 0x07,         /*      Report Count (7),                   */
+	0x81, 0x01,         /*      Input (Constant),                   */
+	0xC0                /*  End Collection                          */
+};
+const size_t uclogic_rdesc_ugee_v2_battery_template_size =
+			sizeof(uclogic_rdesc_ugee_v2_battery_template_arr);
+
 /* Fixed report descriptor for Ugee EX07 frame */
 const __u8 uclogic_rdesc_ugee_ex07_frame_arr[] = {
 	0x05, 0x01,             /*  Usage Page (Desktop),                   */

drivers/hid/hid-uclogic-rdesc.h

···
 /* Device ID byte offset in v2 frame dial reports */
 #define UCLOGIC_RDESC_V2_FRAME_DIAL_DEV_ID_BYTE	0x4
 
+/* Report ID for tweaked UGEE v2 battery reports */
+#define UCLOGIC_RDESC_UGEE_V2_BATTERY_ID 0xba
+
 /* Fixed report descriptor template for UGEE v2 pen reports */
 extern const __u8 uclogic_rdesc_ugee_v2_pen_template_arr[];
 extern const size_t uclogic_rdesc_ugee_v2_pen_template_size;
···
 /* Fixed report descriptor template for UGEE v2 frame reports (mouse) */
 extern const __u8 uclogic_rdesc_ugee_v2_frame_mouse_template_arr[];
 extern const size_t uclogic_rdesc_ugee_v2_frame_mouse_template_size;
+
+/* Fixed report descriptor template for UGEE v2 battery reports */
+extern const __u8 uclogic_rdesc_ugee_v2_battery_template_arr[];
+extern const size_t uclogic_rdesc_ugee_v2_battery_template_size;
 
 /* Fixed report descriptor for Ugee EX07 frame */
 extern const __u8 uclogic_rdesc_ugee_ex07_frame_arr[];

drivers/hid/hid-wiimote-core.c

···
 	if (rmem[0] == 0x00 && rmem[1] == 0x00 &&
 	    rmem[4] == 0x01 && rmem[5] == 0x03)
 		return WIIMOTE_EXT_GUITAR;
+	if (rmem[0] == 0x03 && rmem[1] == 0x00 &&
+	    rmem[4] == 0x01 && rmem[5] == 0x03)
+		return WIIMOTE_EXT_TURNTABLE;
 
 	return WIIMOTE_EXT_UNKNOWN;
 }
···
 	case WIIMOTE_EXT_GUITAR:
 		wmem = 0x07;
 		break;
+	case WIIMOTE_EXT_TURNTABLE:
 	case WIIMOTE_EXT_NUNCHUK:
 		wmem = 0x05;
 		break;
···
 	[WIIMOTE_EXT_PRO_CONTROLLER] = "Nintendo Wii U Pro Controller",
 	[WIIMOTE_EXT_DRUMS] = "Nintendo Wii Drums",
 	[WIIMOTE_EXT_GUITAR] = "Nintendo Wii Guitar",
+	[WIIMOTE_EXT_TURNTABLE] = "Nintendo Wii Turntable"
 };
 
 /*
···
 		return sprintf(buf, "drums\n");
 	case WIIMOTE_EXT_GUITAR:
 		return sprintf(buf, "guitar\n");
+	case WIIMOTE_EXT_TURNTABLE:
+		return sprintf(buf, "turntable\n");
 	case WIIMOTE_EXT_UNKNOWN:
 	default:
 		return sprintf(buf, "unknown\n");

drivers/hid/hid-wiimote-modules.c

···
 	.in_ext = wiimod_guitar_in_ext,
 };
 
+/* 
+ * Turntable
+ * DJ Hero came with a Turntable Controller that was plugged in
+ * as an extension.
+ * We create a separate device for turntables and report all information via this
+ * input device.
+*/
+
+enum wiimod_turntable_keys {
+	WIIMOD_TURNTABLE_KEY_G_RIGHT,
+	WIIMOD_TURNTABLE_KEY_R_RIGHT,
+	WIIMOD_TURNTABLE_KEY_B_RIGHT,
+	WIIMOD_TURNTABLE_KEY_G_LEFT,
+	WIIMOD_TURNTABLE_KEY_R_LEFT,
+	WIIMOD_TURNTABLE_KEY_B_LEFT,
+	WIIMOD_TURNTABLE_KEY_EUPHORIA,
+	WIIMOD_TURNTABLE_KEY_PLUS,
+	WIIMOD_TURNTABLE_KEY_MINUS,
+	WIIMOD_TURNTABLE_KEY_NUM
+};
+
+static const __u16 wiimod_turntable_map[] = {
+	BTN_1,			/* WIIMOD_TURNTABLE_KEY_G_RIGHT */
+	BTN_2,			/* WIIMOD_TURNTABLE_KEY_R_RIGHT */
+	BTN_3,			/* WIIMOD_TURNTABLE_KEY_B_RIGHT */
+	BTN_4,			/* WIIMOD_TURNTABLE_KEY_G_LEFT */
+	BTN_5,			/* WIIMOD_TURNTABLE_KEY_R_LEFT */
+	BTN_6,			/* WIIMOD_TURNTABLE_KEY_B_LEFT */
+	BTN_7,			/* WIIMOD_TURNTABLE_KEY_EUPHORIA */
+	BTN_START,		/* WIIMOD_TURNTABLE_KEY_PLUS */
+	BTN_SELECT,		/* WIIMOD_TURNTABLE_KEY_MINUS */
+};
+
+static void wiimod_turntable_in_ext(struct wiimote_data *wdata, const __u8 *ext)
+{
+	__u8 be, cs, sx, sy, ed, rtt, rbg, rbr, rbb, ltt, lbg, lbr, lbb, bp, bm;
+	/* 
+	 * Byte |  7   |  6  |  5  |  4  |  3  |  2   |  1   |  0     |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   0  | RTT<4:3>   | 		      	  SX <5:0> 			      |
+	 *   1  | RTT<2:1>   |				  SY <5:0>			      |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   2  |RTT<0>|  ED<4:3>  |          CS<3:0>        | RTT<5> |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   3  |     ED<2:0> 	   | 			 LTT<4:0>			  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   4  |  0   |  0  | LBR |  B- |  0  |  B+  |  RBR | LTT<5> |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   5  | LBB  |  0  | RBG |  BE | LBG | RBB  | 0    | 0      |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 * All pressed buttons are 0
+	 *
+	 * With Motion+ enabled, it will look like this:
+	 * Byte |  8   |  7  |  6  |  5  |  4  |  3   |  2   |  1     |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   1  | RTT<4:3>   | 		      	  SX <5:1> 		 |	  0   |
+	 *   2  | RTT<2:1>   |				  SY <5:1>		 |	  0   |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   3  |RTT<0>|  ED<4:3>  |          CS<3:0>        | RTT<5> |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   4  |     ED<2:0> 	   | 			 LTT<4:0>			  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   5  |  0   |  0  | LBR |  B- |  0  |  B+  | RBR  |  XXXX  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   6  | LBB  |  0  | RBG |  BE | LBG | RBB  | XXXX |  XXXX  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 */
+	
+	be = !(ext[5] & 0x10); 
+	cs = ((ext[2] & 0x1e));
+	sx = ext[0] & 0x3f;
+	sy = ext[1] & 0x3f;
+	ed = (ext[3] & 0xe0) >> 5;
+	rtt = ((ext[2] & 0x01) << 5 | (ext[0] & 0xc0) >> 3 | (ext[1] & 0xc0) >> 5 | ( ext[2] & 0x80 ) >> 7);
+	ltt = ((ext[4] & 0x01) << 5 | (ext[3] & 0x1f));
+	rbg = !(ext[5] & 0x20);
+	rbr = !(ext[4] & 0x02);
+	rbb = !(ext[5] & 0x04);
+	lbg = !(ext[5] & 0x08);
+	lbb = !(ext[5] & 0x80);
+	lbr = !(ext[4] & 0x20);
+	bm =  !(ext[4] & 0x10);
+	bp =  !(ext[4] & 0x04);
+
+	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
+		ltt = (ext[4] & 0x01) << 5;
+		sx &= 0x3e;
+		sy &= 0x3e;
+	}
+
+	input_report_abs(wdata->extension.input, ABS_X, sx);
+	input_report_abs(wdata->extension.input, ABS_Y, sy);
+	input_report_abs(wdata->extension.input, ABS_HAT0X, rtt);
+	input_report_abs(wdata->extension.input, ABS_HAT1X, ltt);
+	input_report_abs(wdata->extension.input, ABS_HAT2X, cs);
+	input_report_abs(wdata->extension.input, ABS_HAT3X, ed);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_G_RIGHT], 
+					rbg);
+	input_report_key(wdata->extension.input,
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_R_RIGHT],
+					rbr);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_B_RIGHT], 
+					rbb);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_G_LEFT], 
+					lbg);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_R_LEFT], 
+					lbr);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_B_LEFT], 
+					lbb);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_EUPHORIA], 
+					be);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_PLUS], 
+					bp);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_MINUS], 
+					bm);
+
+	input_sync(wdata->extension.input);
+}
+
+static int wiimod_turntable_open(struct input_dev *dev)
+{
+	struct wiimote_data *wdata = input_get_drvdata(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&wdata->state.lock, flags);
+	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
+	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
+	spin_unlock_irqrestore(&wdata->state.lock, flags);
+
+	return 0;
+}
+
+static void wiimod_turntable_close(struct input_dev *dev)
+{
+	struct wiimote_data *wdata = input_get_drvdata(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&wdata->state.lock, flags);
+	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
+	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
+	spin_unlock_irqrestore(&wdata->state.lock, flags);
+}
+
+static int wiimod_turntable_probe(const struct wiimod_ops *ops,
+			       struct wiimote_data *wdata)
+{
+ 	int ret, i;
+
+	wdata->extension.input = input_allocate_device();
+	if (!wdata->extension.input)
+		return -ENOMEM;
+
+	input_set_drvdata(wdata->extension.input, wdata);
+	wdata->extension.input->open = wiimod_turntable_open;
+	wdata->extension.input->close = wiimod_turntable_close;
+	wdata->extension.input->dev.parent = &wdata->hdev->dev;
+	wdata->extension.input->id.bustype = wdata->hdev->bus;
+	wdata->extension.input->id.vendor = wdata->hdev->vendor;
+	wdata->extension.input->id.product = wdata->hdev->product;
+	wdata->extension.input->id.version = wdata->hdev->version;
+	wdata->extension.input->name = WIIMOTE_NAME " Turntable";
+
+	set_bit(EV_KEY, wdata->extension.input->evbit);
+	for (i = 0; i < WIIMOD_TURNTABLE_KEY_NUM; ++i)
+		set_bit(wiimod_turntable_map[i],
+			wdata->extension.input->keybit);
+
+	set_bit(EV_ABS, wdata->extension.input->evbit);
+	set_bit(ABS_X, wdata->extension.input->absbit);
+	set_bit(ABS_Y, wdata->extension.input->absbit);
+	set_bit(ABS_HAT0X, wdata->extension.input->absbit);
+	set_bit(ABS_HAT1X, wdata->extension.input->absbit);
+	set_bit(ABS_HAT2X, wdata->extension.input->absbit);
+	set_bit(ABS_HAT3X, wdata->extension.input->absbit);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_X, 0, 63, 1, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_Y, 63, 0, 1, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT0X, -8, 8, 0, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT1X, -8, 8, 0, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT2X, 0, 31, 1, 1);	
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT3X, 0, 7, 0, 0);	 
+	ret = input_register_device(wdata->extension.input);
+	if (ret)
+		goto err_free;
+
+	return 0;
+
+err_free:
+	input_free_device(wdata->extension.input);
+	wdata->extension.input = NULL;
+	return ret;
+}
+
+static void wiimod_turntable_remove(const struct wiimod_ops *ops,
+				 struct wiimote_data *wdata)
+{
+	if (!wdata->extension.input)
+		return;
+
+	input_unregister_device(wdata->extension.input);
+	wdata->extension.input = NULL;
+}
+
+static const struct wiimod_ops wiimod_turntable = {
+	.flags = 0,
+	.arg = 0,
+	.probe = wiimod_turntable_probe,
+	.remove = wiimod_turntable_remove,
+	.in_ext = wiimod_turntable_in_ext,
+};
+
 /*
  * Builtin Motion Plus
  * This module simply sets the WIIPROTO_FLAG_BUILTIN_MP protocol flag which
···
 	[WIIMOTE_EXT_PRO_CONTROLLER] = &wiimod_pro,
 	[WIIMOTE_EXT_DRUMS] = &wiimod_drums,
 	[WIIMOTE_EXT_GUITAR] = &wiimod_guitar,
+	[WIIMOTE_EXT_TURNTABLE] = &wiimod_turntable,
 };

drivers/hid/hid-wiimote.h

···
 	WIIMOTE_EXT_PRO_CONTROLLER,
 	WIIMOTE_EXT_DRUMS,
 	WIIMOTE_EXT_GUITAR,
+	WIIMOTE_EXT_TURNTABLE,
 	WIIMOTE_EXT_NUM,
 };
 

drivers/hid/i2c-hid/i2c-hid-core.c

···
 	i2c_hid_dbg(ihid, "input: %*ph\n", ret_size, ihid->inbuf);
 
 	if (test_bit(I2C_HID_STARTED, &ihid->flags)) {
-		pm_wakeup_event(&ihid->client->dev, 0);
+		if (ihid->hid->group != HID_GROUP_RMI)
+			pm_wakeup_event(&ihid->client->dev, 0);
 
 		hid_input_report(ihid->hid, HID_INPUT_REPORT,
 				ihid->inbuf + sizeof(__le16),

drivers/hid/i2c-hid/i2c-hid-of-elan.c

···
 	regulator_disable(ihid_elan->vcc33);
 }
 
-static int i2c_hid_of_elan_probe(struct i2c_client *client,
-				 const struct i2c_device_id *id)
+static int i2c_hid_of_elan_probe(struct i2c_client *client)
 {
 	struct i2c_hid_of_elan *ihid_elan;
 
···
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 		.of_match_table = of_match_ptr(elan_i2c_hid_of_match),
 	},
-	.probe		= i2c_hid_of_elan_probe,
+	.probe_new	= i2c_hid_of_elan_probe,
 	.remove		= i2c_hid_core_remove,
 	.shutdown	= i2c_hid_core_shutdown,
 };

drivers/hid/i2c-hid/i2c-hid-of-goodix.c

···
 	return ret;
 }
 
-static int i2c_hid_of_goodix_probe(struct i2c_client *client,
-				   const struct i2c_device_id *id)
+static int i2c_hid_of_goodix_probe(struct i2c_client *client)
 {
 	struct i2c_hid_of_goodix *ihid_goodix;
 	int ret;
···
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 		.of_match_table = of_match_ptr(goodix_i2c_hid_of_match),
 	},
-	.probe		= i2c_hid_of_goodix_probe,
+	.probe_new	= i2c_hid_of_goodix_probe,
 	.remove		= i2c_hid_core_remove,
 	.shutdown	= i2c_hid_core_shutdown,
 };

drivers/hid/i2c-hid/i2c-hid-of.c

···
 			       ihid_of->supplies);
 }
 
-static int i2c_hid_of_probe(struct i2c_client *client,
-			    const struct i2c_device_id *dev_id)
+static int i2c_hid_of_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	struct i2c_hid_of *ihid_of;
···
 		.of_match_table = of_match_ptr(i2c_hid_of_match),
 	},
 
-	.probe		= i2c_hid_of_probe,
+	.probe_new	= i2c_hid_of_probe,
 	.remove		= i2c_hid_core_remove,
 	.shutdown	= i2c_hid_core_shutdown,
 	.id_table	= i2c_hid_of_id_table,

drivers/hid/intel-ish-hid/ishtp/client.c

···
 	unsigned char *buffer = NULL;
 	struct ishtp_cl_rb *complete_rb = NULL;
 	unsigned long	flags;
-	int	rb_count;
 
 	if (ishtp_hdr->reserved) {
 		dev_err(dev->devc, "corrupted message header.\n");
···
 	}
 
 	spin_lock_irqsave(&dev->read_list_spinlock, flags);
-	rb_count = -1;
 	list_for_each_entry(rb, &dev->read_list.list, list) {
-		++rb_count;
 		cl = rb->cl;
 		if (!cl || !(cl->host_client_id == ishtp_hdr->host_addr &&
 				cl->fw_client_id == ishtp_hdr->fw_addr) ||