iio: pressure: st_pressure: Add support for LPS22DF

Add support for ST LPS22DF pressure sensor.

Datasheet: https://www.st.com/resource/en/datasheet/lps22df.pdf
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Link: https://lore.kernel.org/r/20220909161611.780720-2-martyn.welch@collabora.co.uk
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/pressure/st_pressure.h b/drivers/iio/pressure/st_pressure.h
index 156e6a7..6e11bea 100644 (file)
--- a/drivers/iio/pressure/st_pressure.h
+++ b/drivers/iio/pressure/st_pressure.h
@@ -22,6 +22,7 @@ enum st_press_type {
        LPS33HW,
        LPS35HW,
        LPS22HH,
+       LPS22DF,
        ST_PRESS_MAX,
 };
 
@@ -32,6 +33,7 @@ enum st_press_type {
 #define LPS33HW_PRESS_DEV_NAME         "lps33hw"
 #define LPS35HW_PRESS_DEV_NAME         "lps35hw"
 #define LPS22HH_PRESS_DEV_NAME         "lps22hh"
+#define LPS22DF_PRESS_DEV_NAME         "lps22df"
 
 /**
  * struct st_sensors_platform_data - default press platform data

diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
index 76913a2..80176e3 100644 (file)
--- a/drivers/iio/pressure/st_pressure_core.c
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -552,6 +552,76 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
                .multi_read_bit = false,
                .bootime = 2,
        },
+       {
+               /*
+                * CUSTOM VALUES FOR LPS22DF SENSOR
+                * See LPS22DF datasheet:
+                * http://www.st.com/resource/en/datasheet/lps22df.pdf
+                */
+               .wai = 0xb4,
+               .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+               .sensors_supported = {
+                       [0] = LPS22DF_PRESS_DEV_NAME,
+               },
+               .ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
+               .num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
+               .odr = {
+                       .addr = 0x10,
+                       .mask = 0x78,
+                       .odr_avl = {
+                               { .hz = 1, .value = 0x01 },
+                               { .hz = 4, .value = 0x02 },
+                               { .hz = 10, .value = 0x03 },
+                               { .hz = 25, .value = 0x04 },
+                               { .hz = 50, .value = 0x05 },
+                               { .hz = 75, .value = 0x06 },
+                               { .hz = 100, .value = 0x07 },
+                               { .hz = 200, .value = 0x08 },
+                       },
+               },
+               .pw = {
+                       .addr = 0x10,
+                       .mask = 0x78,
+                       .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+               },
+               .fs = {
+                       .fs_avl = {
+                               /*
+                                * Pressure and temperature sensitivity values
+                                * as defined in table 2 of LPS22DF datasheet.
+                                */
+                               [0] = {
+                                       .num = ST_PRESS_FS_AVL_1260MB,
+                                       .gain = ST_PRESS_KPASCAL_NANO_SCALE,
+                                       .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
+                               },
+                       },
+               },
+               .bdu = {
+                       .addr = 0x11,
+                       .mask = BIT(3),
+               },
+               .drdy_irq = {
+                       .int1 = {
+                               .addr = 0x13,
+                               .mask = BIT(5),
+                               .addr_od = 0x12,
+                               .mask_od = BIT(1),
+                       },
+                       .addr_ihl = 0x12,
+                       .mask_ihl = BIT(3),
+                       .stat_drdy = {
+                               .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+                               .mask = 0x03,
+                       },
+               },
+               .sim = {
+                       .addr = 0x0E,
+                       .value = BIT(5),
+               },
+               .multi_read_bit = false,
+               .bootime = 2,
+       },
 };
 
 static int st_press_write_raw(struct iio_dev *indio_dev,

diff --git a/drivers/iio/pressure/st_pressure_i2c.c b/drivers/iio/pressure/st_pressure_i2c.c
index 7035777..58fede8 100644 (file)
--- a/drivers/iio/pressure/st_pressure_i2c.c
+++ b/drivers/iio/pressure/st_pressure_i2c.c
@@ -47,6 +47,10 @@ static const struct of_device_id st_press_of_match[] = {
                .compatible = "st,lps22hh",
                .data = LPS22HH_PRESS_DEV_NAME,
        },
+       {
+               .compatible = "st,lps22df",
+               .data = LPS22DF_PRESS_DEV_NAME,
+       },
        {},
 };
 MODULE_DEVICE_TABLE(of, st_press_of_match);
@@ -67,6 +71,7 @@ static const struct i2c_device_id st_press_id_table[] = {
        { LPS33HW_PRESS_DEV_NAME, LPS33HW },
        { LPS35HW_PRESS_DEV_NAME, LPS35HW },
        { LPS22HH_PRESS_DEV_NAME, LPS22HH },
+       { LPS22DF_PRESS_DEV_NAME, LPS22DF },
        {},
 };
 MODULE_DEVICE_TABLE(i2c, st_press_id_table);

diff --git a/drivers/iio/pressure/st_pressure_spi.c b/drivers/iio/pressure/st_pressure_spi.c
index bfab8e7..25cca5a 100644 (file)
--- a/drivers/iio/pressure/st_pressure_spi.c
+++ b/drivers/iio/pressure/st_pressure_spi.c
@@ -51,6 +51,10 @@ static const struct of_device_id st_press_of_match[] = {
                .compatible = "st,lps22hh",
                .data = LPS22HH_PRESS_DEV_NAME,
        },
+       {
+               .compatible = "st,lps22df",
+               .data = LPS22DF_PRESS_DEV_NAME,
+       },
        {},
 };
 MODULE_DEVICE_TABLE(of, st_press_of_match);
@@ -97,6 +101,7 @@ static const struct spi_device_id st_press_id_table[] = {
        { LPS33HW_PRESS_DEV_NAME },
        { LPS35HW_PRESS_DEV_NAME },
        { LPS22HH_PRESS_DEV_NAME },
+       { LPS22DF_PRESS_DEV_NAME },
        { "lps001wp-press" },
        { "lps25h-press", },
        { "lps331ap-press" },