iio: magnetometer: support for lsm303dlh

The LSM303DLH accelerometer/magnetometer has a different
device identification method than using register 0x0f, instead
three registers contain a magic value. We rely on WhoAmI
to be zero for this variant.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/Documentation/devicetree/bindings/iio/st-sensors.txt b/Documentation/devicetree/bindings/iio/st-sensors.txt
index d2aaca9..fb5e0c2 100644 (file)
--- a/Documentation/devicetree/bindings/iio/st-sensors.txt
+++ b/Documentation/devicetree/bindings/iio/st-sensors.txt
@@ -45,6 +45,7 @@ Gyroscopes:
 - st,lsm330-gyro
 
 Magnetometers:
+- st,lsm303dlh-magn
 - st,lsm303dlhc-magn
 - st,lsm303dlm-magn
 - st,lis3mdl-magn

diff --git a/drivers/iio/magnetometer/st_magn.h b/drivers/iio/magnetometer/st_magn.h
index 7e81d00..287691c 100644 (file)
--- a/drivers/iio/magnetometer/st_magn.h
+++ b/drivers/iio/magnetometer/st_magn.h
@@ -14,6 +14,7 @@
 #include <linux/types.h>
 #include <linux/iio/common/st_sensors.h>
 
+#define LSM303DLH_MAGN_DEV_NAME                "lsm303dlh_magn"
 #define LSM303DLHC_MAGN_DEV_NAME       "lsm303dlhc_magn"
 #define LSM303DLM_MAGN_DEV_NAME                "lsm303dlm_magn"
 #define LIS3MDL_MAGN_DEV_NAME          "lis3mdl"

diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index 8ade473..73574d9 100644 (file)
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -45,6 +45,46 @@
 #define ST_MAGN_FS_AVL_12000MG                 12000
 #define ST_MAGN_FS_AVL_16000MG                 16000
 
+/* CUSTOM VALUES FOR SENSOR 0 */
+#define ST_MAGN_0_ODR_ADDR                     0x00
+#define ST_MAGN_0_ODR_MASK                     0x1c
+#define ST_MAGN_0_ODR_AVL_1HZ_VAL              0x00
+#define ST_MAGN_0_ODR_AVL_2HZ_VAL              0x01
+#define ST_MAGN_0_ODR_AVL_3HZ_VAL              0x02
+#define ST_MAGN_0_ODR_AVL_8HZ_VAL              0x03
+#define ST_MAGN_0_ODR_AVL_15HZ_VAL             0x04
+#define ST_MAGN_0_ODR_AVL_30HZ_VAL             0x05
+#define ST_MAGN_0_ODR_AVL_75HZ_VAL             0x06
+#define ST_MAGN_0_ODR_AVL_220HZ_VAL            0x07
+#define ST_MAGN_0_PW_ADDR                      0x02
+#define ST_MAGN_0_PW_MASK                      0x03
+#define ST_MAGN_0_PW_ON                                0x00
+#define ST_MAGN_0_PW_OFF                       0x03
+#define ST_MAGN_0_FS_ADDR                      0x01
+#define ST_MAGN_0_FS_MASK                      0xe0
+#define ST_MAGN_0_FS_AVL_1300_VAL              0x01
+#define ST_MAGN_0_FS_AVL_1900_VAL              0x02
+#define ST_MAGN_0_FS_AVL_2500_VAL              0x03
+#define ST_MAGN_0_FS_AVL_4000_VAL              0x04
+#define ST_MAGN_0_FS_AVL_4700_VAL              0x05
+#define ST_MAGN_0_FS_AVL_5600_VAL              0x06
+#define ST_MAGN_0_FS_AVL_8100_VAL              0x07
+#define ST_MAGN_0_FS_AVL_1300_GAIN_XY          1100
+#define ST_MAGN_0_FS_AVL_1900_GAIN_XY          855
+#define ST_MAGN_0_FS_AVL_2500_GAIN_XY          670
+#define ST_MAGN_0_FS_AVL_4000_GAIN_XY          450
+#define ST_MAGN_0_FS_AVL_4700_GAIN_XY          400
+#define ST_MAGN_0_FS_AVL_5600_GAIN_XY          330
+#define ST_MAGN_0_FS_AVL_8100_GAIN_XY          230
+#define ST_MAGN_0_FS_AVL_1300_GAIN_Z           980
+#define ST_MAGN_0_FS_AVL_1900_GAIN_Z           760
+#define ST_MAGN_0_FS_AVL_2500_GAIN_Z           600
+#define ST_MAGN_0_FS_AVL_4000_GAIN_Z           400
+#define ST_MAGN_0_FS_AVL_4700_GAIN_Z           355
+#define ST_MAGN_0_FS_AVL_5600_GAIN_Z           295
+#define ST_MAGN_0_FS_AVL_8100_GAIN_Z           205
+#define ST_MAGN_0_MULTIREAD_BIT                        false
+
 /* CUSTOM VALUES FOR SENSOR 1 */
 #define ST_MAGN_1_WAI_EXP                      0x3c
 #define ST_MAGN_1_ODR_ADDR                     0x00
@@ -151,6 +191,82 @@ 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 */
+               .sensors_supported = {
+                       [0] = LSM303DLH_MAGN_DEV_NAME,
+               },
+               .ch = (struct iio_chan_spec *)st_magn_16bit_channels,
+               .odr = {
+                       .addr = ST_MAGN_0_ODR_ADDR,
+                       .mask = ST_MAGN_0_ODR_MASK,
+                       .odr_avl = {
+                               { 1, ST_MAGN_0_ODR_AVL_1HZ_VAL, },
+                               { 2, ST_MAGN_0_ODR_AVL_2HZ_VAL, },
+                               { 3, ST_MAGN_0_ODR_AVL_3HZ_VAL, },
+                               { 8, ST_MAGN_0_ODR_AVL_8HZ_VAL, },
+                               { 15, ST_MAGN_0_ODR_AVL_15HZ_VAL, },
+                               { 30, ST_MAGN_0_ODR_AVL_30HZ_VAL, },
+                               { 75, ST_MAGN_0_ODR_AVL_75HZ_VAL, },
+                       },
+               },
+               .pw = {
+                       .addr = ST_MAGN_0_PW_ADDR,
+                       .mask = ST_MAGN_0_PW_MASK,
+                       .value_on = ST_MAGN_0_PW_ON,
+                       .value_off = ST_MAGN_0_PW_OFF,
+               },
+               .fs = {
+                       .addr = ST_MAGN_0_FS_ADDR,
+                       .mask = ST_MAGN_0_FS_MASK,
+                       .fs_avl = {
+                               [0] = {
+                                       .num = ST_MAGN_FS_AVL_1300MG,
+                                       .value = ST_MAGN_0_FS_AVL_1300_VAL,
+                                       .gain = ST_MAGN_0_FS_AVL_1300_GAIN_XY,
+                                       .gain2 = ST_MAGN_0_FS_AVL_1300_GAIN_Z,
+                               },
+                               [1] = {
+                                       .num = ST_MAGN_FS_AVL_1900MG,
+                                       .value = ST_MAGN_0_FS_AVL_1900_VAL,
+                                       .gain = ST_MAGN_0_FS_AVL_1900_GAIN_XY,
+                                       .gain2 = ST_MAGN_0_FS_AVL_1900_GAIN_Z,
+                               },
+                               [2] = {
+                                       .num = ST_MAGN_FS_AVL_2500MG,
+                                       .value = ST_MAGN_0_FS_AVL_2500_VAL,
+                                       .gain = ST_MAGN_0_FS_AVL_2500_GAIN_XY,
+                                       .gain2 = ST_MAGN_0_FS_AVL_2500_GAIN_Z,
+                               },
+                               [3] = {
+                                       .num = ST_MAGN_FS_AVL_4000MG,
+                                       .value = ST_MAGN_0_FS_AVL_4000_VAL,
+                                       .gain = ST_MAGN_0_FS_AVL_4000_GAIN_XY,
+                                       .gain2 = ST_MAGN_0_FS_AVL_4000_GAIN_Z,
+                               },
+                               [4] = {
+                                       .num = ST_MAGN_FS_AVL_4700MG,
+                                       .value = ST_MAGN_0_FS_AVL_4700_VAL,
+                                       .gain = ST_MAGN_0_FS_AVL_4700_GAIN_XY,
+                                       .gain2 = ST_MAGN_0_FS_AVL_4700_GAIN_Z,
+                               },
+                               [5] = {
+                                       .num = ST_MAGN_FS_AVL_5600MG,
+                                       .value = ST_MAGN_0_FS_AVL_5600_VAL,
+                                       .gain = ST_MAGN_0_FS_AVL_5600_GAIN_XY,
+                                       .gain2 = ST_MAGN_0_FS_AVL_5600_GAIN_Z,
+                               },
+                               [6] = {
+                                       .num = ST_MAGN_FS_AVL_8100MG,
+                                       .value = ST_MAGN_0_FS_AVL_8100_VAL,
+                                       .gain = ST_MAGN_0_FS_AVL_8100_GAIN_XY,
+                                       .gain2 = ST_MAGN_0_FS_AVL_8100_GAIN_Z,
+                               },
+                       },
+               },
+               .multi_read_bit = ST_MAGN_0_MULTIREAD_BIT,
+               .bootime = 2,
+       },
+       {
                .wai = ST_MAGN_1_WAI_EXP,
                .sensors_supported = {
                        [0] = LSM303DLHC_MAGN_DEV_NAME,

diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c
index 92e5c15..5311d8a 100644 (file)
--- a/drivers/iio/magnetometer/st_magn_i2c.c
+++ b/drivers/iio/magnetometer/st_magn_i2c.c
@@ -21,6 +21,10 @@
 #ifdef CONFIG_OF
 static const struct of_device_id st_magn_of_match[] = {
        {
+               .compatible = "st,lsm303dlh-magn",
+               .data = LSM303DLH_MAGN_DEV_NAME,
+       },
+       {
                .compatible = "st,lsm303dlhc-magn",
                .data = LSM303DLHC_MAGN_DEV_NAME,
        },
@@ -71,6 +75,7 @@ static int st_magn_i2c_remove(struct i2c_client *client)
 }
 
 static const struct i2c_device_id st_magn_id_table[] = {
+       { LSM303DLH_MAGN_DEV_NAME },
        { LSM303DLHC_MAGN_DEV_NAME },
        { LSM303DLM_MAGN_DEV_NAME },
        { LIS3MDL_MAGN_DEV_NAME },