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iio:adis16400: Expose some debug information in debugfs 

Expose some information useful for debugging a device in debugfs. This includes
for now the flash count, the product id and the serial number and raw register
access.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2013-01-16 12:48:00 +00:00 committed by Jonathan Cameron
parent 7ba8a04dcd
commit 1db18bb4c2
2 changed files with 113 additions and 4 deletions
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4
drivers/iio/imu/adis16400.h
View File

@ -74,7 +74,10 @@
#define ADIS16400_ALM_CTRL 0x48 /* Alarm control */
#define ADIS16400_AUX_DAC 0x4A /* Auxiliary DAC data */
#define ADIS16334_LOT_ID1 0x52 /* Lot identification code 1 */
#define ADIS16334_LOT_ID2 0x54 /* Lot identification code 2 */
#define ADIS16400_PRODUCT_ID 0x56 /* Product identifier */
#define ADIS16334_SERIAL_NUMBER 0x58 /* Serial number, lot specific */
#define ADIS16400_ERROR_ACTIVE (1<<14)
#define ADIS16400_NEW_DATA (1<<14)
@ -132,6 +135,7 @@
#define ADIS16400_HAS_PROD_ID BIT(0)
#define ADIS16400_NO_BURST BIT(1)
#define ADIS16400_HAS_SLOW_MODE BIT(2)
#define ADIS16400_HAS_SERIAL_NUMBER BIT(3)
struct adis16400_state;

113
drivers/iio/imu/adis16400_core.c
View File

@ -25,6 +25,7 @@
#include <linux/sysfs.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/debugfs.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@ -32,6 +33,104 @@
#include "adis16400.h"
#ifdef CONFIG_DEBUG_FS
static ssize_t adis16400_show_serial_number(struct file *file,
char __user *userbuf, size_t count, loff_t *ppos)
{
struct adis16400_state *st = file->private_data;
u16 lot1, lot2, serial_number;
char buf[16];
size_t len;
int ret;
ret = adis_read_reg_16(&st->adis, ADIS16334_LOT_ID1, &lot1);
if (ret < 0)
return ret;
ret = adis_read_reg_16(&st->adis, ADIS16334_LOT_ID2, &lot2);
if (ret < 0)
return ret;
ret = adis_read_reg_16(&st->adis, ADIS16334_SERIAL_NUMBER,
&serial_number);
if (ret < 0)
return ret;
len = snprintf(buf, sizeof(buf), "%.4x-%.4x-%.4x\n", lot1, lot2,
serial_number);
return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
static const struct file_operations adis16400_serial_number_fops = {
.open = simple_open,
.read = adis16400_show_serial_number,
.llseek = default_llseek,
.owner = THIS_MODULE,
};
static int adis16400_show_product_id(void *arg, u64 *val)
{
struct adis16400_state *st = arg;
uint16_t prod_id;
int ret;
ret = adis_read_reg_16(&st->adis, ADIS16400_PRODUCT_ID, &prod_id);
if (ret < 0)
return ret;
*val = prod_id;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(adis16400_product_id_fops,
adis16400_show_product_id, NULL, "%lld\n");
static int adis16400_show_flash_count(void *arg, u64 *val)
{
struct adis16400_state *st = arg;
uint16_t flash_count;
int ret;
ret = adis_read_reg_16(&st->adis, ADIS16400_FLASH_CNT, &flash_count);
if (ret < 0)
return ret;
*val = flash_count;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(adis16400_flash_count_fops,
adis16400_show_flash_count, NULL, "%lld\n");
static int adis16400_debugfs_init(struct iio_dev *indio_dev)
{
struct adis16400_state *st = iio_priv(indio_dev);
if (st->variant->flags & ADIS16400_HAS_SERIAL_NUMBER)
debugfs_create_file("serial_number", 0400,
indio_dev->debugfs_dentry, st,
&adis16400_serial_number_fops);
if (st->variant->flags & ADIS16400_HAS_PROD_ID)
debugfs_create_file("product_id", 0400,
indio_dev->debugfs_dentry, st,
&adis16400_product_id_fops);
debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry,
st, &adis16400_flash_count_fops);
return 0;
}
#else
static int adis16400_debugfs_init(struct iio_dev *indio_dev)
{
return 0;
}
#endif
enum adis16400_chip_variant {
ADIS16300,
ADIS16334,
@ -600,7 +699,8 @@ static struct adis16400_chip_info adis16400_chips[] = {
[ADIS16334] = {
.channels = adis16334_channels,
.num_channels = ARRAY_SIZE(adis16334_channels),
.flags = ADIS16400_HAS_PROD_ID,
.flags = ADIS16400_HAS_PROD_ID | ADIS16400_NO_BURST |
ADIS16400_HAS_SERIAL_NUMBER,
.gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
.accel_scale_micro = IIO_G_TO_M_S_2(1000), /* 1 mg */
.temp_scale_nano = 67850000, /* 0.06785 C */
@ -622,7 +722,8 @@ static struct adis16400_chip_info adis16400_chips[] = {
[ADIS16360] = {
.channels = adis16350_channels,
.num_channels = ARRAY_SIZE(adis16350_channels),
.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE,
.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
ADIS16400_HAS_SERIAL_NUMBER,
.gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
.accel_scale_micro = IIO_G_TO_M_S_2(3333), /* 3.333 mg */
.temp_scale_nano = 136000000, /* 0.136 C */
@ -633,7 +734,8 @@ static struct adis16400_chip_info adis16400_chips[] = {
[ADIS16362] = {
.channels = adis16350_channels,
.num_channels = ARRAY_SIZE(adis16350_channels),
.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE,
.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
ADIS16400_HAS_SERIAL_NUMBER,
.gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
.accel_scale_micro = IIO_G_TO_M_S_2(333), /* 0.333 mg */
.temp_scale_nano = 136000000, /* 0.136 C */
@ -644,7 +746,8 @@ static struct adis16400_chip_info adis16400_chips[] = {
[ADIS16364] = {
.channels = adis16350_channels,
.num_channels = ARRAY_SIZE(adis16350_channels),
.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE,
.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
ADIS16400_HAS_SERIAL_NUMBER,
.gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
.accel_scale_micro = IIO_G_TO_M_S_2(1000), /* 1 mg */
.temp_scale_nano = 136000000, /* 0.136 C */
@ -671,6 +774,7 @@ static const struct iio_info adis16400_info = {
.write_raw = &adis16400_write_raw,
.attrs = &adis16400_attribute_group,
.update_scan_mode = adis16400_update_scan_mode,
.debugfs_reg_access = adis_debugfs_reg_access,
};
static const unsigned long adis16400_burst_scan_mask[] = {
@ -768,6 +872,7 @@ static int adis16400_probe(struct spi_device *spi)
if (ret)
goto error_cleanup_buffer;
adis16400_debugfs_init(indio_dev);
return 0;
error_cleanup_buffer: