From 1db18bb4c25823bfc11f370157f9d23a4d99ea1d Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 16 Jan 2013 12:48:00 +0000 Subject: [PATCH] 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 Signed-off-by: Jonathan Cameron --- 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 a3b9e56c5bd1..627018537aac 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 58699ac22d02..e8f84c9e84c6 100644 --- a/drivers/iio/imu/adis16400_core.c +++ b/drivers/iio/imu/adis16400_core.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -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: -- 2.20.1