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iio: st-sensors: add configuration for WhoAmI address 

This patch permits to configure the WhoAmI register address
because some device could have not a standard address for
this register.

Signed-off-by: Giuseppe Barba <giuseppe.barba@st.com>
Reviewed-by: Denis Ciocca <denis.ciocca@st.com>
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Giuseppe Barba 2015-07-21 10:35:41 +02:00 committed by Jonathan Cameron
parent c176becd81
commit bc27381edb
6 changed files with 39 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/iio/accel/st_accel_core.c
View File

@ -226,6 +226,7 @@ static const struct iio_chan_spec st_accel_16bit_channels[] = {
static const struct st_sensor_settings st_accel_sensors_settings[] = {
{
.wai = ST_ACCEL_1_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LIS3DH_ACCEL_DEV_NAME,
[1] = LSM303DLHC_ACCEL_DEV_NAME,
@ -297,6 +298,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
},
{
.wai = ST_ACCEL_2_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LIS331DLH_ACCEL_DEV_NAME,
[1] = LSM303DL_ACCEL_DEV_NAME,
@ -359,6 +361,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
},
{
.wai = ST_ACCEL_3_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LSM330_ACCEL_DEV_NAME,
},
@ -437,6 +440,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
},
{
.wai = ST_ACCEL_4_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LIS3LV02DL_ACCEL_DEV_NAME,
},
@ -494,6 +498,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
},
{
.wai = ST_ACCEL_5_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LIS331DL_ACCEL_DEV_NAME,
},

49
drivers/iio/common/st_sensors/st_sensors_core.c
View File

@ -479,46 +479,43 @@ int st_sensors_check_device_support(struct iio_dev *indio_dev,
int num_sensors_list,
const struct st_sensor_settings *sensor_settings)
{
u8 wai;
int i, n, err;
u8 wai;
struct st_sensor_data *sdata = iio_priv(indio_dev);
for (i = 0; i < num_sensors_list; i++) {
for (n = 0; n < ST_SENSORS_MAX_4WAI; n++) {
if (strcmp(indio_dev->name,
sensor_settings[i].sensors_supported[n]) == 0) {
break;
}
}
if (n < ST_SENSORS_MAX_4WAI)
break;
}
if (i == num_sensors_list) {
dev_err(&indio_dev->dev, "device name %s not recognized.\n",
indio_dev->name);
return -ENODEV;
}
err = sdata->tf->read_byte(&sdata->tb, sdata->dev,
ST_SENSORS_DEFAULT_WAI_ADDRESS, &wai);
sensor_settings[i].wai_addr, &wai);
if (err < 0) {
dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n");
goto read_wai_error;
return err;
}
for (i = 0; i < num_sensors_list; i++) {
if (sensor_settings[i].wai == wai)
break;
}
if (i == num_sensors_list)
goto device_not_supported;
for (n = 0; n < ARRAY_SIZE(sensor_settings[i].sensors_supported); n++) {
if (strcmp(indio_dev->name,
&sensor_settings[i].sensors_supported[n][0]) == 0)
break;
}
if (n == ARRAY_SIZE(sensor_settings[i].sensors_supported)) {
dev_err(&indio_dev->dev, "device name \"%s\" and WhoAmI (0x%02x) mismatch",
indio_dev->name, wai);
goto sensor_name_mismatch;
if (sensor_settings[i].wai != wai) {
dev_err(&indio_dev->dev, "%s: WhoAmI mismatch (0x%x).\n",
indio_dev->name, wai);
return -EINVAL;
}
sdata->sensor_settings =
(struct st_sensor_settings *)&sensor_settings[i];
return i;
device_not_supported:
dev_err(&indio_dev->dev, "device not supported: WhoAmI (0x%x).\n", wai);
sensor_name_mismatch:
err = -ENODEV;
read_wai_error:
return err;
}
EXPORT_SYMBOL(st_sensors_check_device_support);

3
drivers/iio/gyro/st_gyro_core.c
View File

@ -131,6 +131,7 @@ static const struct iio_chan_spec st_gyro_16bit_channels[] = {
static const struct st_sensor_settings st_gyro_sensors_settings[] = {
{
.wai = ST_GYRO_1_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = L3G4200D_GYRO_DEV_NAME,
[1] = LSM330DL_GYRO_DEV_NAME,
@ -190,6 +191,7 @@ static const struct st_sensor_settings st_gyro_sensors_settings[] = {
},
{
.wai = ST_GYRO_2_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = L3GD20_GYRO_DEV_NAME,
[1] = LSM330D_GYRO_DEV_NAME,
@ -252,6 +254,7 @@ static const struct st_sensor_settings st_gyro_sensors_settings[] = {
},
{
.wai = ST_GYRO_3_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = L3GD20_GYRO_DEV_NAME,
},

3
drivers/iio/magnetometer/st_magn_core.c
View File

@ -192,6 +192,7 @@ static const struct iio_chan_spec st_magn_2_16bit_channels[] = {
static const struct st_sensor_settings st_magn_sensors_settings[] = {
{
.wai = 0, /* This sensor has no valid WhoAmI report 0 */
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LSM303DLH_MAGN_DEV_NAME,
},
@ -268,6 +269,7 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
},
{
.wai = ST_MAGN_1_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LSM303DLHC_MAGN_DEV_NAME,
[1] = LSM303DLM_MAGN_DEV_NAME,
@ -346,6 +348,7 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
},
{
.wai = ST_MAGN_2_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LIS3MDL_MAGN_DEV_NAME,
},

3
drivers/iio/pressure/st_pressure_core.c
View File

@ -178,6 +178,7 @@ static const struct iio_chan_spec st_press_lps001wp_channels[] = {
static const struct st_sensor_settings st_press_sensors_settings[] = {
{
.wai = ST_PRESS_LPS331AP_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LPS331AP_PRESS_DEV_NAME,
},
@ -225,6 +226,7 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
},
{
.wai = ST_PRESS_LPS001WP_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LPS001WP_PRESS_DEV_NAME,
},
@ -260,6 +262,7 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
},
{
.wai = ST_PRESS_LPS25H_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LPS25H_PRESS_DEV_NAME,
},

2
include/linux/iio/common/st_sensors.h
View File

@ -166,6 +166,7 @@ struct st_sensor_transfer_function {
/**
* struct st_sensor_settings - ST specific sensor settings
* @wai: Contents of WhoAmI register.
* @wai_addr: The address of WhoAmI register.
* @sensors_supported: List of supported sensors by struct itself.
* @ch: IIO channels for the sensor.
* @odr: Output data rate register and ODR list available.
@ -179,6 +180,7 @@ struct st_sensor_transfer_function {
*/
struct st_sensor_settings {
u8 wai;
u8 wai_addr;
char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME];
struct iio_chan_spec *ch;
int num_ch;