tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
staging: iio: new adis16204 driver
IIO driver for Programmable High-g Digital Impact Sensor and Recorder.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
authored by
Barry Song
and committed by
Greg Kroah-Hartman
bb6f19ea
f11ba4f5
+1125
+9
drivers/staging/iio/accel/Kconfig
+9
drivers/staging/iio/accel/Kconfig
···
21
21
Say yes here to build support for Analog Devices adis16203 Programmable
22
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360 Degrees Inclinometer.
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config ADIS16204
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tristate "Analog Devices ADIS16204 Programmable High-g Digital Impact Sensor and Recorder"
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depends on SPI
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select IIO_TRIGGER if IIO_RING_BUFFER
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select IIO_SW_RING if IIO_RING_BUFFER
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help
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Say yes here to build support for Analog Devices adis16204 Programmable
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High-g Digital Impact Sensor and Recorder.
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+
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config ADIS16209
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tristate "Analog Devices ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer"
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depends on SPI
+4
drivers/staging/iio/accel/Makefile
+4
drivers/staging/iio/accel/Makefile
···
10
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adis16203-$(CONFIG_IIO_RING_BUFFER) += adis16203_ring.o adis16203_trigger.o
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obj-$(CONFIG_ADIS16203) += adis16203.o
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adis16204-y := adis16204_core.o
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adis16204-$(CONFIG_IIO_RING_BUFFER) += adis16204_ring.o adis16204_trigger.o
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obj-$(CONFIG_ADIS16204) += adis16204.o
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adis16209-y := adis16209_core.o
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adis16209-$(CONFIG_IIO_RING_BUFFER) += adis16209_ring.o adis16209_trigger.o
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obj-$(CONFIG_ADIS16209) += adis16209.o
+20
drivers/staging/iio/accel/accel.h
+20
drivers/staging/iio/accel/accel.h
···
65
65
#define IIO_DEV_ATTR_ACCEL_Z(_show, _addr) \
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IIO_DEVICE_ATTR(accel_z_raw, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_XY(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xy, S_IRUGO, _show, NULL, _addr)
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+
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#define IIO_DEV_ATTR_ACCEL_PEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_peak, S_IRUGO, _show, NULL, _addr)
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+
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#define IIO_DEV_ATTR_ACCEL_XPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xpeak, S_IRUGO, _show, NULL, _addr)
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+
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#define IIO_DEV_ATTR_ACCEL_YPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_ypeak, S_IRUGO, _show, NULL, _addr)
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+
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#define IIO_DEV_ATTR_ACCEL_ZPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_zpeak, S_IRUGO, _show, NULL, _addr)
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+
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#define IIO_DEV_ATTR_ACCEL_XYPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xypeak, S_IRUGO, _show, NULL, _addr)
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+
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#define IIO_DEV_ATTR_ACCEL_XYZPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xyzpeak, S_IRUGO, _show, NULL, _addr)
+151
drivers/staging/iio/accel/adis16204.h
+151
drivers/staging/iio/accel/adis16204.h
···
1
+
#ifndef SPI_ADIS16204_H_
2
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#define SPI_ADIS16204_H_
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4
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#define ADIS16204_STARTUP_DELAY 220 /* ms */
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#define ADIS16204_READ_REG(a) a
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#define ADIS16204_WRITE_REG(a) ((a) | 0x80)
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+
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#define ADIS16204_FLASH_CNT 0x00 /* Flash memory write count */
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#define ADIS16204_SUPPLY_OUT 0x02 /* Output, power supply */
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#define ADIS16204_XACCL_OUT 0x04 /* Output, x-axis accelerometer */
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#define ADIS16204_YACCL_OUT 0x06 /* Output, y-axis accelerometer */
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#define ADIS16204_AUX_ADC 0x08 /* Output, auxiliary ADC input */
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#define ADIS16204_TEMP_OUT 0x0A /* Output, temperature */
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#define ADIS16204_X_PEAK_OUT 0x0C /* Twos complement */
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#define ADIS16204_Y_PEAK_OUT 0x0E /* Twos complement */
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#define ADIS16204_XACCL_NULL 0x10 /* Calibration, x-axis acceleration offset null */
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#define ADIS16204_YACCL_NULL 0x12 /* Calibration, y-axis acceleration offset null */
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#define ADIS16204_XACCL_SCALE 0x14 /* X-axis scale factor calibration register */
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#define ADIS16204_YACCL_SCALE 0x16 /* Y-axis scale factor calibration register */
21
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#define ADIS16204_XY_RSS_OUT 0x18 /* XY combined acceleration (RSS) */
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#define ADIS16204_XY_PEAK_OUT 0x1A /* Peak, XY combined output (RSS) */
23
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#define ADIS16204_CAP_BUF_1 0x1C /* Capture buffer output register 1 */
24
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#define ADIS16204_CAP_BUF_2 0x1E /* Capture buffer output register 2 */
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#define ADIS16204_ALM_MAG1 0x20 /* Alarm 1 amplitude threshold */
26
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#define ADIS16204_ALM_MAG2 0x22 /* Alarm 2 amplitude threshold */
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#define ADIS16204_ALM_CTRL 0x28 /* Alarm control */
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#define ADIS16204_CAPT_PNTR 0x2A /* Capture register address pointer */
29
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#define ADIS16204_AUX_DAC 0x30 /* Auxiliary DAC data */
30
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#define ADIS16204_GPIO_CTRL 0x32 /* General-purpose digital input/output control */
31
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#define ADIS16204_MSC_CTRL 0x34 /* Miscellaneous control */
32
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#define ADIS16204_SMPL_PRD 0x36 /* Internal sample period (rate) control */
33
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#define ADIS16204_AVG_CNT 0x38 /* Operation, filter configuration */
34
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#define ADIS16204_SLP_CNT 0x3A /* Operation, sleep mode control */
35
+
#define ADIS16204_DIAG_STAT 0x3C /* Diagnostics, system status register */
36
+
#define ADIS16204_GLOB_CMD 0x3E /* Operation, system command register */
37
+
38
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#define ADIS16204_OUTPUTS 5
39
+
40
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/* MSC_CTRL */
41
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#define ADIS16204_MSC_CTRL_PWRUP_SELF_TEST (1 << 10) /* Self-test at power-on: 1 = disabled, 0 = enabled */
42
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#define ADIS16204_MSC_CTRL_SELF_TEST_EN (1 << 8) /* Self-test enable */
43
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#define ADIS16204_MSC_CTRL_DATA_RDY_EN (1 << 2) /* Data-ready enable: 1 = enabled, 0 = disabled */
44
+
#define ADIS16204_MSC_CTRL_ACTIVE_HIGH (1 << 1) /* Data-ready polarity: 1 = active high, 0 = active low */
45
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#define ADIS16204_MSC_CTRL_DATA_RDY_DIO2 (1 << 0) /* Data-ready line selection: 1 = DIO2, 0 = DIO1 */
46
+
47
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/* DIAG_STAT */
48
+
#define ADIS16204_DIAG_STAT_ALARM2 (1<<9) /* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
49
+
#define ADIS16204_DIAG_STAT_ALARM1 (1<<8) /* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
50
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#define ADIS16204_DIAG_STAT_SELFTEST_FAIL (1<<5) /* Self-test diagnostic error flag: 1 = error condition,
51
+
0 = normal operation */
52
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#define ADIS16204_DIAG_STAT_SPI_FAIL (1<<3) /* SPI communications failure */
53
+
#define ADIS16204_DIAG_STAT_FLASH_UPT (1<<2) /* Flash update failure */
54
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#define ADIS16204_DIAG_STAT_POWER_HIGH (1<<1) /* Power supply above 3.625 V */
55
+
#define ADIS16204_DIAG_STAT_POWER_LOW (1<<0) /* Power supply below 2.975 V */
56
+
57
+
/* GLOB_CMD */
58
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#define ADIS16204_GLOB_CMD_SW_RESET (1<<7)
59
+
#define ADIS16204_GLOB_CMD_CLEAR_STAT (1<<4)
60
+
#define ADIS16204_GLOB_CMD_FACTORY_CAL (1<<1)
61
+
62
+
#define ADIS16204_MAX_TX 24
63
+
#define ADIS16204_MAX_RX 24
64
+
65
+
#define ADIS16204_ERROR_ACTIVE (1<<14)
66
+
67
+
/**
68
+
* struct adis16204_state - device instance specific data
69
+
* @us: actual spi_device
70
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* @work_trigger_to_ring: bh for triggered event handling
71
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* @inter: used to check if new interrupt has been triggered
72
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* @last_timestamp: passing timestamp from th to bh of interrupt handler
73
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* @indio_dev: industrial I/O device structure
74
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* @trig: data ready trigger registered with iio
75
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* @tx: transmit buffer
76
+
* @rx: recieve buffer
77
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* @buf_lock: mutex to protect tx and rx
78
+
**/
79
+
struct adis16204_state {
80
+
struct spi_device *us;
81
+
struct work_struct work_trigger_to_ring;
82
+
s64 last_timestamp;
83
+
struct iio_dev *indio_dev;
84
+
struct iio_trigger *trig;
85
+
u8 *tx;
86
+
u8 *rx;
87
+
struct mutex buf_lock;
88
+
};
89
+
90
+
int adis16204_set_irq(struct device *dev, bool enable);
91
+
92
+
#ifdef CONFIG_IIO_RING_BUFFER
93
+
enum adis16204_scan {
94
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ADIS16204_SCAN_SUPPLY,
95
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ADIS16204_SCAN_ACC_X,
96
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ADIS16204_SCAN_ACC_Y,
97
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ADIS16204_SCAN_AUX_ADC,
98
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ADIS16204_SCAN_TEMP,
99
+
};
100
+
101
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void adis16204_remove_trigger(struct iio_dev *indio_dev);
102
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int adis16204_probe_trigger(struct iio_dev *indio_dev);
103
+
104
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ssize_t adis16204_read_data_from_ring(struct device *dev,
105
+
struct device_attribute *attr,
106
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char *buf);
107
+
108
+
int adis16204_configure_ring(struct iio_dev *indio_dev);
109
+
void adis16204_unconfigure_ring(struct iio_dev *indio_dev);
110
+
111
+
int adis16204_initialize_ring(struct iio_ring_buffer *ring);
112
+
void adis16204_uninitialize_ring(struct iio_ring_buffer *ring);
113
+
#else /* CONFIG_IIO_RING_BUFFER */
114
+
115
+
static inline void adis16204_remove_trigger(struct iio_dev *indio_dev)
116
+
{
117
+
}
118
+
119
+
static inline int adis16204_probe_trigger(struct iio_dev *indio_dev)
120
+
{
121
+
return 0;
122
+
}
123
+
124
+
static inline ssize_t
125
+
adis16204_read_data_from_ring(struct device *dev,
126
+
struct device_attribute *attr,
127
+
char *buf)
128
+
{
129
+
return 0;
130
+
}
131
+
132
+
static int adis16204_configure_ring(struct iio_dev *indio_dev)
133
+
{
134
+
return 0;
135
+
}
136
+
137
+
static inline void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
138
+
{
139
+
}
140
+
141
+
static inline int adis16204_initialize_ring(struct iio_ring_buffer *ring)
142
+
{
143
+
return 0;
144
+
}
145
+
146
+
static inline void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
147
+
{
148
+
}
149
+
150
+
#endif /* CONFIG_IIO_RING_BUFFER */
151
+
#endif /* SPI_ADIS16204_H_ */
+613
drivers/staging/iio/accel/adis16204_core.c
+613
drivers/staging/iio/accel/adis16204_core.c
···
1
+
/*
2
+
* ADIS16204 Programmable High-g Digital Impact Sensor and Recorder
3
+
*
4
+
* Copyright 2010 Analog Devices Inc.
5
+
*
6
+
* Licensed under the GPL-2 or later.
7
+
*/
8
+
9
+
#include <linux/interrupt.h>
10
+
#include <linux/irq.h>
11
+
#include <linux/gpio.h>
12
+
#include <linux/delay.h>
13
+
#include <linux/mutex.h>
14
+
#include <linux/device.h>
15
+
#include <linux/kernel.h>
16
+
#include <linux/spi/spi.h>
17
+
#include <linux/slab.h>
18
+
#include <linux/sysfs.h>
19
+
#include <linux/list.h>
20
+
21
+
#include "../iio.h"
22
+
#include "../sysfs.h"
23
+
#include "accel.h"
24
+
#include "../gyro/gyro.h"
25
+
#include "../adc/adc.h"
26
+
27
+
#include "adis16204.h"
28
+
29
+
#define DRIVER_NAME "adis16204"
30
+
31
+
static int adis16204_check_status(struct device *dev);
32
+
33
+
/**
34
+
* adis16204_spi_write_reg_8() - write single byte to a register
35
+
* @dev: device associated with child of actual device (iio_dev or iio_trig)
36
+
* @reg_address: the address of the register to be written
37
+
* @val: the value to write
38
+
**/
39
+
static int adis16204_spi_write_reg_8(struct device *dev,
40
+
u8 reg_address,
41
+
u8 val)
42
+
{
43
+
int ret;
44
+
struct iio_dev *indio_dev = dev_get_drvdata(dev);
45
+
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
46
+
47
+
mutex_lock(&st->buf_lock);
48
+
st->tx[0] = ADIS16204_WRITE_REG(reg_address);
49
+
st->tx[1] = val;
50
+
51
+
ret = spi_write(st->us, st->tx, 2);
52
+
mutex_unlock(&st->buf_lock);
53
+
54
+
return ret;
55
+
}
56
+
57
+
/**
58
+
* adis16204_spi_write_reg_16() - write 2 bytes to a pair of registers
59
+
* @dev: device associated with child of actual device (iio_dev or iio_trig)
60
+
* @reg_address: the address of the lower of the two registers. Second register
61
+
* is assumed to have address one greater.
62
+
* @val: value to be written
63
+
**/
64
+
static int adis16204_spi_write_reg_16(struct device *dev,
65
+
u8 lower_reg_address,
66
+
u16 value)
67
+
{
68
+
int ret;
69
+
struct spi_message msg;
70
+
struct iio_dev *indio_dev = dev_get_drvdata(dev);
71
+
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
72
+
struct spi_transfer xfers[] = {
73
+
{
74
+
.tx_buf = st->tx,
75
+
.bits_per_word = 8,
76
+
.len = 2,
77
+
.cs_change = 1,
78
+
}, {
79
+
.tx_buf = st->tx + 2,
80
+
.bits_per_word = 8,
81
+
.len = 2,
82
+
.cs_change = 1,
83
+
},
84
+
};
85
+
86
+
mutex_lock(&st->buf_lock);
87
+
st->tx[0] = ADIS16204_WRITE_REG(lower_reg_address);
88
+
st->tx[1] = value & 0xFF;
89
+
st->tx[2] = ADIS16204_WRITE_REG(lower_reg_address + 1);
90
+
st->tx[3] = (value >> 8) & 0xFF;
91
+
92
+
spi_message_init(&msg);
93
+
spi_message_add_tail(&xfers[0], &msg);
94
+
spi_message_add_tail(&xfers[1], &msg);
95
+
ret = spi_sync(st->us, &msg);
96
+
mutex_unlock(&st->buf_lock);
97
+
98
+
return ret;
99
+
}
100
+
101
+
/**
102
+
* adis16204_spi_read_reg_16() - read 2 bytes from a 16-bit register
103
+
* @dev: device associated with child of actual device (iio_dev or iio_trig)
104
+
* @reg_address: the address of the lower of the two registers. Second register
105
+
* is assumed to have address one greater.
106
+
* @val: somewhere to pass back the value read
107
+
**/
108
+
static int adis16204_spi_read_reg_16(struct device *dev,
109
+
u8 lower_reg_address,
110
+
u16 *val)
111
+
{
112
+
struct spi_message msg;
113
+
struct iio_dev *indio_dev = dev_get_drvdata(dev);
114
+
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
115
+
int ret;
116
+
struct spi_transfer xfers[] = {
117
+
{
118
+
.tx_buf = st->tx,
119
+
.bits_per_word = 8,
120
+
.len = 2,
121
+
.cs_change = 1,
122
+
.delay_usecs = 20,
123
+
}, {
124
+
.rx_buf = st->rx,
125
+
.bits_per_word = 8,
126
+
.len = 2,
127
+
.cs_change = 1,
128
+
.delay_usecs = 20,
129
+
},
130
+
};
131
+
132
+
mutex_lock(&st->buf_lock);
133
+
st->tx[0] = ADIS16204_READ_REG(lower_reg_address);
134
+
st->tx[1] = 0;
135
+
136
+
spi_message_init(&msg);
137
+
spi_message_add_tail(&xfers[0], &msg);
138
+
spi_message_add_tail(&xfers[1], &msg);
139
+
ret = spi_sync(st->us, &msg);
140
+
if (ret) {
141
+
dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",
142
+
lower_reg_address);
143
+
goto error_ret;
144
+
}
145
+
*val = (st->rx[0] << 8) | st->rx[1];
146
+
147
+
error_ret:
148
+
mutex_unlock(&st->buf_lock);
149
+
return ret;
150
+
}
151
+
152
+
static ssize_t adis16204_read_12bit_unsigned(struct device *dev,
153
+
struct device_attribute *attr,
154
+
char *buf)
155
+
{
156
+
int ret;
157
+
u16 val = 0;
158
+
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
159
+
160
+
ret = adis16204_spi_read_reg_16(dev, this_attr->address, &val);
161
+
if (ret)
162
+
return ret;
163
+
164
+
if (val & ADIS16204_ERROR_ACTIVE)
165
+
adis16204_check_status(dev);
166
+
167
+
return sprintf(buf, "%u\n", val & 0x0FFF);
168
+
}
169
+
170
+
static ssize_t adis16204_read_temp(struct device *dev,
171
+
struct device_attribute *attr,
172
+
char *buf)
173
+
{
174
+
struct iio_dev *indio_dev = dev_get_drvdata(dev);
175
+
ssize_t ret;
176
+
u16 val;
177
+
178
+
/* Take the iio_dev status lock */
179
+
mutex_lock(&indio_dev->mlock);
180
+
181
+
ret = adis16204_spi_read_reg_16(dev, ADIS16204_TEMP_OUT, (u16 *)&val);
182
+
if (ret)
183
+
goto error_ret;
184
+
185
+
if (val & ADIS16204_ERROR_ACTIVE)
186
+
adis16204_check_status(dev);
187
+
188
+
val &= 0xFFF;
189
+
ret = sprintf(buf, "%d\n", val);
190
+
191
+
error_ret:
192
+
mutex_unlock(&indio_dev->mlock);
193
+
return ret;
194
+
}
195
+
196
+
static ssize_t adis16204_read_12bit_signed(struct device *dev,
197
+
struct device_attribute *attr,
198
+
char *buf)
199
+
{
200
+
struct iio_dev *indio_dev = dev_get_drvdata(dev);
201
+
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
202
+
s16 val = 0;
203
+
ssize_t ret;
204
+
205
+
mutex_lock(&indio_dev->mlock);
206
+
207
+
ret = adis16204_spi_read_reg_16(dev, this_attr->address, (u16 *)&val);
208
+
if (!ret) {
209
+
if (val & ADIS16204_ERROR_ACTIVE)
210
+
adis16204_check_status(dev);
211
+
212
+
val = ((s16)(val << 4) >> 4);
213
+
ret = sprintf(buf, "%d\n", val);
214
+
}
215
+
216
+
mutex_unlock(&indio_dev->mlock);
217
+
218
+
return ret;
219
+
}
220
+
221
+
static ssize_t adis16204_read_14bit_signed(struct device *dev,
222
+
struct device_attribute *attr,
223
+
char *buf)
224
+
{
225
+
struct iio_dev *indio_dev = dev_get_drvdata(dev);
226
+
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
227
+
s16 val = 0;
228
+
ssize_t ret;
229
+
230
+
mutex_lock(&indio_dev->mlock);
231
+
232
+
ret = adis16204_spi_read_reg_16(dev, this_attr->address, (u16 *)&val);
233
+
if (!ret) {
234
+
if (val & ADIS16204_ERROR_ACTIVE)
235
+
adis16204_check_status(dev);
236
+
237
+
val = ((s16)(val << 2) >> 2);
238
+
ret = sprintf(buf, "%d\n", val);
239
+
}
240
+
241
+
mutex_unlock(&indio_dev->mlock);
242
+
243
+
return ret;
244
+
}
245
+
246
+
static ssize_t adis16204_write_16bit(struct device *dev,
247
+
struct device_attribute *attr,
248
+
const char *buf,
249
+
size_t len)
250
+
{
251
+
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
252
+
int ret;
253
+
long val;
254
+
255
+
ret = strict_strtol(buf, 10, &val);
256
+
if (ret)
257
+
goto error_ret;
258
+
ret = adis16204_spi_write_reg_16(dev, this_attr->address, val);
259
+
260
+
error_ret:
261
+
return ret ? ret : len;
262
+
}
263
+
264
+
static int adis16204_reset(struct device *dev)
265
+
{
266
+
int ret;
267
+
ret = adis16204_spi_write_reg_8(dev,
268
+
ADIS16204_GLOB_CMD,
269
+
ADIS16204_GLOB_CMD_SW_RESET);
270
+
if (ret)
271
+
dev_err(dev, "problem resetting device");
272
+
273
+
return ret;
274
+
}
275
+
276
+
static ssize_t adis16204_write_reset(struct device *dev,
277
+
struct device_attribute *attr,
278
+
const char *buf, size_t len)
279
+
{
280
+
if (len < 1)
281
+
return -EINVAL;
282
+
switch (buf[0]) {
283
+
case '1':
284
+
case 'y':
285
+
case 'Y':
286
+
return adis16204_reset(dev);
287
+
}
288
+
return -EINVAL;
289
+
}
290
+
291
+
int adis16204_set_irq(struct device *dev, bool enable)
292
+
{
293
+
int ret = 0;
294
+
u16 msc;
295
+
296
+
ret = adis16204_spi_read_reg_16(dev, ADIS16204_MSC_CTRL, &msc);
297
+
if (ret)
298
+
goto error_ret;
299
+
300
+
msc |= ADIS16204_MSC_CTRL_ACTIVE_HIGH;
301
+
msc &= ~ADIS16204_MSC_CTRL_DATA_RDY_DIO2;
302
+
if (enable)
303
+
msc |= ADIS16204_MSC_CTRL_DATA_RDY_EN;
304
+
else
305
+
msc &= ~ADIS16204_MSC_CTRL_DATA_RDY_EN;
306
+
307
+
ret = adis16204_spi_write_reg_16(dev, ADIS16204_MSC_CTRL, msc);
308
+
309
+
error_ret:
310
+
return ret;
311
+
}
312
+
313
+
static int adis16204_check_status(struct device *dev)
314
+
{
315
+
u16 status;
316
+
int ret;
317
+
318
+
ret = adis16204_spi_read_reg_16(dev, ADIS16204_DIAG_STAT, &status);
319
+
if (ret < 0) {
320
+
dev_err(dev, "Reading status failed\n");
321
+
goto error_ret;
322
+
}
323
+
ret = status & 0x1F;
324
+
325
+
if (status & ADIS16204_DIAG_STAT_SELFTEST_FAIL)
326
+
dev_err(dev, "Self test failure\n");
327
+
if (status & ADIS16204_DIAG_STAT_SPI_FAIL)
328
+
dev_err(dev, "SPI failure\n");
329
+
if (status & ADIS16204_DIAG_STAT_FLASH_UPT)
330
+
dev_err(dev, "Flash update failed\n");
331
+
if (status & ADIS16204_DIAG_STAT_POWER_HIGH)
332
+
dev_err(dev, "Power supply above 3.625V\n");
333
+
if (status & ADIS16204_DIAG_STAT_POWER_LOW)
334
+
dev_err(dev, "Power supply below 2.975V\n");
335
+
336
+
error_ret:
337
+
return ret;
338
+
}
339
+
340
+
static int adis16204_self_test(struct device *dev)
341
+
{
342
+
int ret;
343
+
ret = adis16204_spi_write_reg_16(dev,
344
+
ADIS16204_MSC_CTRL,
345
+
ADIS16204_MSC_CTRL_SELF_TEST_EN);
346
+
if (ret) {
347
+
dev_err(dev, "problem starting self test");
348
+
goto err_ret;
349
+
}
350
+
351
+
adis16204_check_status(dev);
352
+
353
+
err_ret:
354
+
return ret;
355
+
}
356
+
357
+
static int adis16204_initial_setup(struct adis16204_state *st)
358
+
{
359
+
int ret;
360
+
struct device *dev = &st->indio_dev->dev;
361
+
362
+
/* Disable IRQ */
363
+
ret = adis16204_set_irq(dev, false);
364
+
if (ret) {
365
+
dev_err(dev, "disable irq failed");
366
+
goto err_ret;
367
+
}
368
+
369
+
/* Do self test */
370
+
ret = adis16204_self_test(dev);
371
+
if (ret) {
372
+
dev_err(dev, "self test failure");
373
+
goto err_ret;
374
+
}
375
+
376
+
/* Read status register to check the result */
377
+
ret = adis16204_check_status(dev);
378
+
if (ret) {
379
+
adis16204_reset(dev);
380
+
dev_err(dev, "device not playing ball -> reset");
381
+
msleep(ADIS16204_STARTUP_DELAY);
382
+
ret = adis16204_check_status(dev);
383
+
if (ret) {
384
+
dev_err(dev, "giving up");
385
+
goto err_ret;
386
+
}
387
+
}
388
+
389
+
printk(KERN_INFO DRIVER_NAME ": at CS%d (irq %d)\n",
390
+
st->us->chip_select, st->us->irq);
391
+
392
+
err_ret:
393
+
return ret;
394
+
}
395
+
396
+
static IIO_DEV_ATTR_IN_NAMED_RAW(0, supply, adis16204_read_12bit_unsigned,
397
+
ADIS16204_SUPPLY_OUT);
398
+
static IIO_CONST_ATTR(in0_supply_scale, "0.00122");
399
+
static IIO_DEV_ATTR_IN_RAW(1, adis16204_read_12bit_unsigned,
400
+
ADIS16204_AUX_ADC);
401
+
static IIO_CONST_ATTR(in1_scale, "0.00061");
402
+
403
+
static IIO_DEV_ATTR_ACCEL_X(adis16204_read_14bit_signed,
404
+
ADIS16204_XACCL_OUT);
405
+
static IIO_DEV_ATTR_ACCEL_Y(adis16204_read_14bit_signed,
406
+
ADIS16204_YACCL_OUT);
407
+
static IIO_DEV_ATTR_ACCEL_XY(adis16204_read_14bit_signed,
408
+
ADIS16204_XY_RSS_OUT);
409
+
static IIO_DEV_ATTR_ACCEL_XPEAK(adis16204_read_14bit_signed,
410
+
ADIS16204_X_PEAK_OUT);
411
+
static IIO_DEV_ATTR_ACCEL_YPEAK(adis16204_read_14bit_signed,
412
+
ADIS16204_Y_PEAK_OUT);
413
+
static IIO_DEV_ATTR_ACCEL_XYPEAK(adis16204_read_14bit_signed,
414
+
ADIS16204_XY_PEAK_OUT);
415
+
static IIO_DEV_ATTR_ACCEL_X_OFFSET(S_IWUSR | S_IRUGO,
416
+
adis16204_read_12bit_signed,
417
+
adis16204_write_16bit,
418
+
ADIS16204_XACCL_NULL);
419
+
static IIO_DEV_ATTR_ACCEL_Y_OFFSET(S_IWUSR | S_IRUGO,
420
+
adis16204_read_12bit_signed,
421
+
adis16204_write_16bit,
422
+
ADIS16204_YACCL_NULL);
423
+
static IIO_CONST_ATTR(accel_x_scale, "0.017125");
424
+
static IIO_CONST_ATTR(accel_y_scale, "0.008407");
425
+
static IIO_CONST_ATTR(accel_xy_scale, "0.017125");
426
+
427
+
static IIO_DEV_ATTR_TEMP_RAW(adis16204_read_temp);
428
+
static IIO_CONST_ATTR(temp_offset, "25");
429
+
static IIO_CONST_ATTR(temp_scale, "-0.47");
430
+
431
+
static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16204_write_reset, 0);
432
+
433
+
static IIO_CONST_ATTR(name, "adis16204");
434
+
435
+
static struct attribute *adis16204_event_attributes[] = {
436
+
NULL
437
+
};
438
+
439
+
static struct attribute_group adis16204_event_attribute_group = {
440
+
.attrs = adis16204_event_attributes,
441
+
};
442
+
443
+
static struct attribute *adis16204_attributes[] = {
444
+
&iio_dev_attr_in0_supply_raw.dev_attr.attr,
445
+
&iio_const_attr_in0_supply_scale.dev_attr.attr,
446
+
&iio_dev_attr_temp_raw.dev_attr.attr,
447
+
&iio_const_attr_temp_offset.dev_attr.attr,
448
+
&iio_const_attr_temp_scale.dev_attr.attr,
449
+
&iio_dev_attr_reset.dev_attr.attr,
450
+
&iio_const_attr_name.dev_attr.attr,
451
+
&iio_dev_attr_in1_raw.dev_attr.attr,
452
+
&iio_const_attr_in1_scale.dev_attr.attr,
453
+
&iio_dev_attr_accel_x_raw.dev_attr.attr,
454
+
&iio_dev_attr_accel_y_raw.dev_attr.attr,
455
+
&iio_dev_attr_accel_xy.dev_attr.attr,
456
+
&iio_dev_attr_accel_xpeak.dev_attr.attr,
457
+
&iio_dev_attr_accel_ypeak.dev_attr.attr,
458
+
&iio_dev_attr_accel_xypeak.dev_attr.attr,
459
+
&iio_dev_attr_accel_x_offset.dev_attr.attr,
460
+
&iio_dev_attr_accel_y_offset.dev_attr.attr,
461
+
&iio_const_attr_accel_x_scale.dev_attr.attr,
462
+
&iio_const_attr_accel_y_scale.dev_attr.attr,
463
+
&iio_const_attr_accel_xy_scale.dev_attr.attr,
464
+
NULL
465
+
};
466
+
467
+
static const struct attribute_group adis16204_attribute_group = {
468
+
.attrs = adis16204_attributes,
469
+
};
470
+
471
+
static int __devinit adis16204_probe(struct spi_device *spi)
472
+
{
473
+
int ret, regdone = 0;
474
+
struct adis16204_state *st = kzalloc(sizeof *st, GFP_KERNEL);
475
+
if (!st) {
476
+
ret = -ENOMEM;
477
+
goto error_ret;
478
+
}
479
+
/* this is only used for removal purposes */
480
+
spi_set_drvdata(spi, st);
481
+
482
+
/* Allocate the comms buffers */
483
+
st->rx = kzalloc(sizeof(*st->rx)*ADIS16204_MAX_RX, GFP_KERNEL);
484
+
if (st->rx == NULL) {
485
+
ret = -ENOMEM;
486
+
goto error_free_st;
487
+
}
488
+
st->tx = kzalloc(sizeof(*st->tx)*ADIS16204_MAX_TX, GFP_KERNEL);
489
+
if (st->tx == NULL) {
490
+
ret = -ENOMEM;
491
+
goto error_free_rx;
492
+
}
493
+
st->us = spi;
494
+
mutex_init(&st->buf_lock);
495
+
/* setup the industrialio driver allocated elements */
496
+
st->indio_dev = iio_allocate_device();
497
+
if (st->indio_dev == NULL) {
498
+
ret = -ENOMEM;
499
+
goto error_free_tx;
500
+
}
501
+
502
+
st->indio_dev->dev.parent = &spi->dev;
503
+
st->indio_dev->num_interrupt_lines = 1;
504
+
st->indio_dev->event_attrs = &adis16204_event_attribute_group;
505
+
st->indio_dev->attrs = &adis16204_attribute_group;
506
+
st->indio_dev->dev_data = (void *)(st);
507
+
st->indio_dev->driver_module = THIS_MODULE;
508
+
st->indio_dev->modes = INDIO_DIRECT_MODE;
509
+
510
+
ret = adis16204_configure_ring(st->indio_dev);
511
+
if (ret)
512
+
goto error_free_dev;
513
+
514
+
ret = iio_device_register(st->indio_dev);
515
+
if (ret)
516
+
goto error_unreg_ring_funcs;
517
+
regdone = 1;
518
+
519
+
ret = adis16204_initialize_ring(st->indio_dev->ring);
520
+
if (ret) {
521
+
printk(KERN_ERR "failed to initialize the ring\n");
522
+
goto error_unreg_ring_funcs;
523
+
}
524
+
525
+
if (spi->irq) {
526
+
ret = iio_register_interrupt_line(spi->irq,
527
+
st->indio_dev,
528
+
0,
529
+
IRQF_TRIGGER_RISING,
530
+
"adis16204");
531
+
if (ret)
532
+
goto error_uninitialize_ring;
533
+
534
+
ret = adis16204_probe_trigger(st->indio_dev);
535
+
if (ret)
536
+
goto error_unregister_line;
537
+
}
538
+
539
+
/* Get the device into a sane initial state */
540
+
ret = adis16204_initial_setup(st);
541
+
if (ret)
542
+
goto error_remove_trigger;
543
+
return 0;
544
+
545
+
error_remove_trigger:
546
+
adis16204_remove_trigger(st->indio_dev);
547
+
error_unregister_line:
548
+
if (spi->irq)
549
+
iio_unregister_interrupt_line(st->indio_dev, 0);
550
+
error_uninitialize_ring:
551
+
adis16204_uninitialize_ring(st->indio_dev->ring);
552
+
error_unreg_ring_funcs:
553
+
adis16204_unconfigure_ring(st->indio_dev);
554
+
error_free_dev:
555
+
if (regdone)
556
+
iio_device_unregister(st->indio_dev);
557
+
else
558
+
iio_free_device(st->indio_dev);
559
+
error_free_tx:
560
+
kfree(st->tx);
561
+
error_free_rx:
562
+
kfree(st->rx);
563
+
error_free_st:
564
+
kfree(st);
565
+
error_ret:
566
+
return ret;
567
+
}
568
+
569
+
static int adis16204_remove(struct spi_device *spi)
570
+
{
571
+
struct adis16204_state *st = spi_get_drvdata(spi);
572
+
struct iio_dev *indio_dev = st->indio_dev;
573
+
574
+
flush_scheduled_work();
575
+
576
+
adis16204_remove_trigger(indio_dev);
577
+
if (spi->irq)
578
+
iio_unregister_interrupt_line(indio_dev, 0);
579
+
580
+
adis16204_uninitialize_ring(indio_dev->ring);
581
+
iio_device_unregister(indio_dev);
582
+
adis16204_unconfigure_ring(indio_dev);
583
+
kfree(st->tx);
584
+
kfree(st->rx);
585
+
kfree(st);
586
+
587
+
return 0;
588
+
}
589
+
590
+
static struct spi_driver adis16204_driver = {
591
+
.driver = {
592
+
.name = "adis16204",
593
+
.owner = THIS_MODULE,
594
+
},
595
+
.probe = adis16204_probe,
596
+
.remove = __devexit_p(adis16204_remove),
597
+
};
598
+
599
+
static __init int adis16204_init(void)
600
+
{
601
+
return spi_register_driver(&adis16204_driver);
602
+
}
603
+
module_init(adis16204_init);
604
+
605
+
static __exit void adis16204_exit(void)
606
+
{
607
+
spi_unregister_driver(&adis16204_driver);
608
+
}
609
+
module_exit(adis16204_exit);
610
+
611
+
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
612
+
MODULE_DESCRIPTION("Analog Devices ADIS16204 Programmable High-g Digital Impact Sensor and Recorder");
613
+
MODULE_LICENSE("GPL v2");
+206
drivers/staging/iio/accel/adis16204_ring.c
+206
drivers/staging/iio/accel/adis16204_ring.c
···
1
+
#include <linux/interrupt.h>
2
+
#include <linux/irq.h>
3
+
#include <linux/gpio.h>
4
+
#include <linux/workqueue.h>
5
+
#include <linux/mutex.h>
6
+
#include <linux/device.h>
7
+
#include <linux/kernel.h>
8
+
#include <linux/spi/spi.h>
9
+
#include <linux/slab.h>
10
+
#include <linux/sysfs.h>
11
+
#include <linux/list.h>
12
+
13
+
#include "../iio.h"
14
+
#include "../sysfs.h"
15
+
#include "../ring_sw.h"
16
+
#include "accel.h"
17
+
#include "../trigger.h"
18
+
#include "adis16204.h"
19
+
20
+
static IIO_SCAN_EL_C(in_supply, ADIS16204_SCAN_SUPPLY, ADIS16204_SUPPLY_OUT, NULL);
21
+
static IIO_CONST_ATTR_SCAN_EL_TYPE(in_supply, u, 12, 16);
22
+
static IIO_SCAN_EL_C(accel_x, ADIS16204_SCAN_ACC_X, ADIS16204_XACCL_OUT, NULL);
23
+
static IIO_SCAN_EL_C(accel_y, ADIS16204_SCAN_ACC_Y, ADIS16204_YACCL_OUT, NULL);
24
+
static IIO_CONST_ATTR_SCAN_EL_TYPE(accel, s, 14, 16);
25
+
static IIO_SCAN_EL_C(in0, ADIS16204_SCAN_AUX_ADC, ADIS16204_AUX_ADC, NULL);
26
+
static IIO_CONST_ATTR_SCAN_EL_TYPE(in0, u, 12, 16);
27
+
static IIO_SCAN_EL_C(temp, ADIS16204_SCAN_TEMP, ADIS16204_TEMP_OUT, NULL);
28
+
static IIO_CONST_ATTR_SCAN_EL_TYPE(temp, u, 12, 16);
29
+
static IIO_SCAN_EL_TIMESTAMP(5);
30
+
static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64);
31
+
32
+
static struct attribute *adis16204_scan_el_attrs[] = {
33
+
&iio_scan_el_in_supply.dev_attr.attr,
34
+
&iio_const_attr_in_supply_index.dev_attr.attr,
35
+
&iio_const_attr_in_supply_type.dev_attr.attr,
36
+
&iio_scan_el_accel_x.dev_attr.attr,
37
+
&iio_const_attr_accel_x_index.dev_attr.attr,
38
+
&iio_scan_el_accel_y.dev_attr.attr,
39
+
&iio_const_attr_accel_y_index.dev_attr.attr,
40
+
&iio_const_attr_accel_type.dev_attr.attr,
41
+
&iio_scan_el_in0.dev_attr.attr,
42
+
&iio_const_attr_in0_index.dev_attr.attr,
43
+
&iio_const_attr_in0_type.dev_attr.attr,
44
+
&iio_scan_el_temp.dev_attr.attr,
45
+
&iio_const_attr_temp_index.dev_attr.attr,
46
+
&iio_const_attr_temp_type.dev_attr.attr,
47
+
&iio_scan_el_timestamp.dev_attr.attr,
48
+
&iio_const_attr_timestamp_index.dev_attr.attr,
49
+
&iio_const_attr_timestamp_type.dev_attr.attr,
50
+
NULL,
51
+
};
52
+
53
+
static struct attribute_group adis16204_scan_el_group = {
54
+
.attrs = adis16204_scan_el_attrs,
55
+
.name = "scan_elements",
56
+
};
57
+
58
+
/**
59
+
* adis16204_poll_func_th() top half interrupt handler called by trigger
60
+
* @private_data: iio_dev
61
+
**/
62
+
static void adis16204_poll_func_th(struct iio_dev *indio_dev, s64 timestamp)
63
+
{
64
+
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
65
+
st->last_timestamp = timestamp;
66
+
schedule_work(&st->work_trigger_to_ring);
67
+
}
68
+
69
+
/**
70
+
* adis16204_read_ring_data() read data registers which will be placed into ring
71
+
* @dev: device associated with child of actual device (iio_dev or iio_trig)
72
+
* @rx: somewhere to pass back the value read
73
+
**/
74
+
static int adis16204_read_ring_data(struct device *dev, u8 *rx)
75
+
{
76
+
struct spi_message msg;
77
+
struct iio_dev *indio_dev = dev_get_drvdata(dev);
78
+
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
79
+
struct spi_transfer xfers[ADIS16204_OUTPUTS + 1];
80
+
int ret;
81
+
int i;
82
+
83
+
mutex_lock(&st->buf_lock);
84
+
85
+
spi_message_init(&msg);
86
+
87
+
memset(xfers, 0, sizeof(xfers));
88
+
for (i = 0; i <= ADIS16204_OUTPUTS; i++) {
89
+
xfers[i].bits_per_word = 8;
90
+
xfers[i].cs_change = 1;
91
+
xfers[i].len = 2;
92
+
xfers[i].delay_usecs = 20;
93
+
xfers[i].tx_buf = st->tx + 2 * i;
94
+
st->tx[2 * i] = ADIS16204_READ_REG(ADIS16204_SUPPLY_OUT + 2 * i);
95
+
st->tx[2 * i + 1] = 0;
96
+
if (i >= 1)
97
+
xfers[i].rx_buf = rx + 2 * (i - 1);
98
+
spi_message_add_tail(&xfers[i], &msg);
99
+
}
100
+
101
+
ret = spi_sync(st->us, &msg);
102
+
if (ret)
103
+
dev_err(&st->us->dev, "problem when burst reading");
104
+
105
+
mutex_unlock(&st->buf_lock);
106
+
107
+
return ret;
108
+
}
109
+
110
+
/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
111
+
* specific to be rolled into the core.
112
+
*/
113
+
static void adis16204_trigger_bh_to_ring(struct work_struct *work_s)
114
+
{
115
+
struct adis16204_state *st
116
+
= container_of(work_s, struct adis16204_state,
117
+
work_trigger_to_ring);
118
+
struct iio_ring_buffer *ring = st->indio_dev->ring;
119
+
120
+
int i = 0;
121
+
s16 *data;
122
+
size_t datasize = ring->access.get_bytes_per_datum(ring);
123
+
124
+
data = kmalloc(datasize, GFP_KERNEL);
125
+
if (data == NULL) {
126
+
dev_err(&st->us->dev, "memory alloc failed in ring bh");
127
+
return;
128
+
}
129
+
130
+
if (ring->scan_count)
131
+
if (adis16204_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
132
+
for (; i < ring->scan_count; i++)
133
+
data[i] = be16_to_cpup(
134
+
(__be16 *)&(st->rx[i*2]));
135
+
136
+
/* Guaranteed to be aligned with 8 byte boundary */
137
+
if (ring->scan_timestamp)
138
+
*((s64 *)(data + ((i + 3)/4)*4)) = st->last_timestamp;
139
+
140
+
ring->access.store_to(ring,
141
+
(u8 *)data,
142
+
st->last_timestamp);
143
+
144
+
iio_trigger_notify_done(st->indio_dev->trig);
145
+
kfree(data);
146
+
147
+
return;
148
+
}
149
+
150
+
void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
151
+
{
152
+
kfree(indio_dev->pollfunc);
153
+
iio_sw_rb_free(indio_dev->ring);
154
+
}
155
+
156
+
int adis16204_configure_ring(struct iio_dev *indio_dev)
157
+
{
158
+
int ret = 0;
159
+
struct adis16204_state *st = indio_dev->dev_data;
160
+
struct iio_ring_buffer *ring;
161
+
INIT_WORK(&st->work_trigger_to_ring, adis16204_trigger_bh_to_ring);
162
+
163
+
ring = iio_sw_rb_allocate(indio_dev);
164
+
if (!ring) {
165
+
ret = -ENOMEM;
166
+
return ret;
167
+
}
168
+
indio_dev->ring = ring;
169
+
/* Effectively select the ring buffer implementation */
170
+
iio_ring_sw_register_funcs(&ring->access);
171
+
ring->bpe = 2;
172
+
ring->scan_el_attrs = &adis16204_scan_el_group;
173
+
ring->scan_timestamp = true;
174
+
ring->preenable = &iio_sw_ring_preenable;
175
+
ring->postenable = &iio_triggered_ring_postenable;
176
+
ring->predisable = &iio_triggered_ring_predisable;
177
+
ring->owner = THIS_MODULE;
178
+
179
+
/* Set default scan mode */
180
+
iio_scan_mask_set(ring, iio_scan_el_in_supply.number);
181
+
iio_scan_mask_set(ring, iio_scan_el_accel_x.number);
182
+
iio_scan_mask_set(ring, iio_scan_el_accel_y.number);
183
+
iio_scan_mask_set(ring, iio_scan_el_temp.number);
184
+
iio_scan_mask_set(ring, iio_scan_el_in0.number);
185
+
186
+
ret = iio_alloc_pollfunc(indio_dev, NULL, &adis16204_poll_func_th);
187
+
if (ret)
188
+
goto error_iio_sw_rb_free;
189
+
190
+
indio_dev->modes |= INDIO_RING_TRIGGERED;
191
+
return 0;
192
+
193
+
error_iio_sw_rb_free:
194
+
iio_sw_rb_free(indio_dev->ring);
195
+
return ret;
196
+
}
197
+
198
+
int adis16204_initialize_ring(struct iio_ring_buffer *ring)
199
+
{
200
+
return iio_ring_buffer_register(ring, 0);
201
+
}
202
+
203
+
void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
204
+
{
205
+
iio_ring_buffer_unregister(ring);
206
+
}
+122
drivers/staging/iio/accel/adis16204_trigger.c
+122
drivers/staging/iio/accel/adis16204_trigger.c
···
1
+
#include <linux/interrupt.h>
2
+
#include <linux/irq.h>
3
+
#include <linux/mutex.h>
4
+
#include <linux/device.h>
5
+
#include <linux/kernel.h>
6
+
#include <linux/sysfs.h>
7
+
#include <linux/list.h>
8
+
#include <linux/spi/spi.h>
9
+
10
+
#include "../iio.h"
11
+
#include "../sysfs.h"
12
+
#include "../trigger.h"
13
+
#include "adis16204.h"
14
+
15
+
/**
16
+
* adis16204_data_rdy_trig_poll() the event handler for the data rdy trig
17
+
**/
18
+
static int adis16204_data_rdy_trig_poll(struct iio_dev *dev_info,
19
+
int index,
20
+
s64 timestamp,
21
+
int no_test)
22
+
{
23
+
struct adis16204_state *st = iio_dev_get_devdata(dev_info);
24
+
struct iio_trigger *trig = st->trig;
25
+
26
+
iio_trigger_poll(trig, timestamp);
27
+
28
+
return IRQ_HANDLED;
29
+
}
30
+
31
+
IIO_EVENT_SH(data_rdy_trig, &adis16204_data_rdy_trig_poll);
32
+
33
+
static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
34
+
35
+
static struct attribute *adis16204_trigger_attrs[] = {
36
+
&dev_attr_name.attr,
37
+
NULL,
38
+
};
39
+
40
+
static const struct attribute_group adis16204_trigger_attr_group = {
41
+
.attrs = adis16204_trigger_attrs,
42
+
};
43
+
44
+
/**
45
+
* adis16204_data_rdy_trigger_set_state() set datardy interrupt state
46
+
**/
47
+
static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
48
+
bool state)
49
+
{
50
+
struct adis16204_state *st = trig->private_data;
51
+
struct iio_dev *indio_dev = st->indio_dev;
52
+
int ret = 0;
53
+
54
+
dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
55
+
ret = adis16204_set_irq(&st->indio_dev->dev, state);
56
+
if (state == false) {
57
+
iio_remove_event_from_list(&iio_event_data_rdy_trig,
58
+
&indio_dev->interrupts[0]
59
+
->ev_list);
60
+
flush_scheduled_work();
61
+
} else {
62
+
iio_add_event_to_list(&iio_event_data_rdy_trig,
63
+
&indio_dev->interrupts[0]->ev_list);
64
+
}
65
+
return ret;
66
+
}
67
+
68
+
/**
69
+
* adis16204_trig_try_reen() try renabling irq for data rdy trigger
70
+
* @trig: the datardy trigger
71
+
**/
72
+
static int adis16204_trig_try_reen(struct iio_trigger *trig)
73
+
{
74
+
struct adis16204_state *st = trig->private_data;
75
+
enable_irq(st->us->irq);
76
+
return 0;
77
+
}
78
+
79
+
int adis16204_probe_trigger(struct iio_dev *indio_dev)
80
+
{
81
+
int ret;
82
+
struct adis16204_state *st = indio_dev->dev_data;
83
+
84
+
st->trig = iio_allocate_trigger();
85
+
st->trig->name = kasprintf(GFP_KERNEL,
86
+
"adis16204-dev%d",
87
+
indio_dev->id);
88
+
if (!st->trig->name) {
89
+
ret = -ENOMEM;
90
+
goto error_free_trig;
91
+
}
92
+
st->trig->dev.parent = &st->us->dev;
93
+
st->trig->owner = THIS_MODULE;
94
+
st->trig->private_data = st;
95
+
st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;
96
+
st->trig->try_reenable = &adis16204_trig_try_reen;
97
+
st->trig->control_attrs = &adis16204_trigger_attr_group;
98
+
ret = iio_trigger_register(st->trig);
99
+
100
+
/* select default trigger */
101
+
indio_dev->trig = st->trig;
102
+
if (ret)
103
+
goto error_free_trig_name;
104
+
105
+
return 0;
106
+
107
+
error_free_trig_name:
108
+
kfree(st->trig->name);
109
+
error_free_trig:
110
+
iio_free_trigger(st->trig);
111
+
112
+
return ret;
113
+
}
114
+
115
+
void adis16204_remove_trigger(struct iio_dev *indio_dev)
116
+
{
117
+
struct adis16204_state *state = indio_dev->dev_data;
118
+
119
+
iio_trigger_unregister(state->trig);
120
+
kfree(state->trig->name);
121
+
iio_free_trigger(state->trig);
122
+
}