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@xxxxxxxxxx>
---
drivers/iio/imu/adis16400.h | 4 ++
drivers/iio/imu/adis16400_core.c | 113 +++++++++++++++++++++++++++++++++++++--
2 files changed, 113 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/imu/adis16400.h b/drivers/iio/imu/adis16400.h
index a3b9e56..6270185 100644
--- a/drivers/iio/imu/adis16400.h
+++ b/drivers/iio/imu/adis16400.h
@@ -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;
diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c
index 58699ac..e8f84c9 100644
--- a/drivers/iio/imu/adis16400_core.c
+++ b/drivers/iio/imu/adis16400_core.c
@@ -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:
--
1.8.0
--
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