Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e5aab7b0 authored by mario tesi's avatar mario tesi Committed by Jonathan Cameron
Browse files

iio:st_pressure:initial lps22hh sensor support 

Initial support for ST LPS22HH pressure sensor. Datasheet:
http://www2.st.com/resource/en/datasheet/lps22hh.pdf



Features:
 * pressure, temperature data and timestamping channels
 * sampling frequency selection [1..200] Hz
 * interrupt based trigger
 * over I2C or SPI interface

Signed-off-by: default avatarmario tesi <mario.tesi@st.com>
Acked-by: default avatarDenis Ciocca <denis.ciocca@st.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent f6ff49b8

drivers/iio/pressure/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -165,7 +165,7 @@ config IIO_ST_PRESS 
	select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)

	help

	  Say yes here to build support for STMicroelectronics pressure

	  sensors: LPS001WP, LPS25H, LPS331AP, LPS22HB.

	  sensors: LPS001WP, LPS25H, LPS331AP, LPS22HB, LPS22HH.



	  This driver can also be built as a module. If so, these modules

	  will be created:

drivers/iio/pressure/st_pressure.h

+2 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ enum st_press_type { 
	LPS22HB,

	LPS33HW,

	LPS35HW,

	LPS22HH,

	ST_PRESS_MAX,

};
@@ -30,6 +31,7 @@ enum st_press_type { 
#define LPS22HB_PRESS_DEV_NAME		"lps22hb"

#define LPS33HW_PRESS_DEV_NAME		"lps33hw"

#define LPS35HW_PRESS_DEV_NAME		"lps35hw"

#define LPS22HH_PRESS_DEV_NAME		"lps22hh"



/**

 * struct st_sensors_platform_data - default press platform data

drivers/iio/pressure/st_pressure_core.c

+69 −0
Original line number Diff line number Diff line
@@ -492,6 +492,75 @@ static const struct st_sensor_settings st_press_sensors_settings[] = { 
		.multi_read_bit = false,

		.bootime = 2,

	},

	{

		/*

		 * CUSTOM VALUES FOR LPS22HH SENSOR

		 * See LPS22HH datasheet:

		 * http://www2.st.com/resource/en/datasheet/lps22hh.pdf

		 */

		.wai = 0xb3,

		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,

		.sensors_supported = {

			[0] = LPS22HH_PRESS_DEV_NAME,

		},

		.ch = (struct iio_chan_spec *)st_press_lps22hb_channels,

		.num_ch = ARRAY_SIZE(st_press_lps22hb_channels),

		.odr = {

			.addr = 0x10,

			.mask = 0x70,

			.odr_avl = {

				{ .hz = 1, .value = 0x01 },

				{ .hz = 10, .value = 0x02 },

				{ .hz = 25, .value = 0x03 },

				{ .hz = 50, .value = 0x04 },

				{ .hz = 75, .value = 0x05 },

				{ .hz = 100, .value = 0x06 },

				{ .hz = 200, .value = 0x07 },

			},

		},

		.pw = {

			.addr = 0x10,

			.mask = 0x70,

			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,

		},

		.fs = {

			.fs_avl = {

				/*

				 * Pressure and temperature sensitivity values

				 * as defined in table 3 of LPS22HH datasheet.

				 */

				[0] = {

					.num = ST_PRESS_FS_AVL_1260MB,

					.gain = ST_PRESS_KPASCAL_NANO_SCALE,

					.gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,

				},

			},

		},

		.bdu = {

			.addr = 0x10,

			.mask = BIT(1),

		},

		.drdy_irq = {

			.int1 = {

				.addr = 0x12,

				.mask = BIT(2),

				.addr_od = 0x11,

				.mask_od = BIT(5),

			},

			.addr_ihl = 0x11,

			.mask_ihl = BIT(6),

			.stat_drdy = {

				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,

				.mask = 0x03,

			},

		},

		.sim = {

			.addr = 0x10,

			.value = BIT(0),

		},

		.multi_read_bit = false,

		.bootime = 2,

	},

};



static int st_press_write_raw(struct iio_dev *indio_dev,

drivers/iio/pressure/st_pressure_i2c.c

+5 −0
Original line number Diff line number Diff line
@@ -45,6 +45,10 @@ static const struct of_device_id st_press_of_match[] = { 
		.compatible = "st,lps35hw",

		.data = LPS35HW_PRESS_DEV_NAME,

	},

	{

		.compatible = "st,lps22hh",

		.data = LPS22HH_PRESS_DEV_NAME,

	},

	{},

};

MODULE_DEVICE_TABLE(of, st_press_of_match);
@@ -69,6 +73,7 @@ static const struct i2c_device_id st_press_id_table[] = { 
	{ LPS22HB_PRESS_DEV_NAME, LPS22HB },

	{ LPS33HW_PRESS_DEV_NAME, LPS33HW },

	{ LPS35HW_PRESS_DEV_NAME, LPS35HW },

	{ LPS22HH_PRESS_DEV_NAME, LPS22HH },

	{},

};

MODULE_DEVICE_TABLE(i2c, st_press_id_table);

drivers/iio/pressure/st_pressure_spi.c

+5 −0
Original line number Diff line number Diff line
@@ -49,6 +49,10 @@ static const struct of_device_id st_press_of_match[] = { 
		.compatible = "st,lps35hw",

		.data = LPS35HW_PRESS_DEV_NAME,

	},

	{

		.compatible = "st,lps22hh",

		.data = LPS22HH_PRESS_DEV_NAME,

	},

	{},

};

MODULE_DEVICE_TABLE(of, st_press_of_match);
@@ -93,6 +97,7 @@ static const struct spi_device_id st_press_id_table[] = { 
	{ LPS22HB_PRESS_DEV_NAME },

	{ LPS33HW_PRESS_DEV_NAME },

	{ LPS35HW_PRESS_DEV_NAME },

	{ LPS22HH_PRESS_DEV_NAME },

	{},

};

MODULE_DEVICE_TABLE(spi, st_press_id_table);