Commit 82e7a1b2 authored by Stefan Popa's avatar Stefan Popa Committed by Jonathan Cameron
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iio: imu: adis16480: Add support for ADIS1649x family of devices 

The ADIS16495 and ADIS16497 are inertial systems that include a triaxis
gyroscope and a triaxis accelerometer. The serial peripheral interface
(SPI) provide a simple interface for data collection and configuration
control. The devices are similar to ADIS16475, ADIS16480, ADIS16485 and
ADIS16488, the main differences are highlighted below:

* The temperature data scale is 0.00565 C/LSB for ADIS16475 and ADIS1648x
  devices, while for ADIS1649x 0.0125 C/LSB.

* ADIS1649x devices support different gyroscope measurement ranges which
  are dependent on the dash number (-1, -2, -3), see Table 24 in the
  ADIS16495 datasheet. However, the ADIS16497 gyroscopes have the same
  scale as ADIS16495.

* ADIS16495 devices support the acceleration maximum range of 8g, while
  ADIS16497 devices go up to 40g.

* The internal clock for ADIS1649x devices is 4.25 kSPS. The sampling
  frequency is calculated by applying a decimation rate which can take a
  maximum value of 4250.

* ADIS1649x devices support different default filter frequencies.

Datasheets:
Link: https://www.analog.com/media/en/technical-documentation/data-sheets/adis16495.pdf
Link: https://www.analog.com/media/en/technical-documentation/data-sheets/adis16497.pdf



Signed-off-by: default avatarStefan Popa <stefan.popa@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 83ec2d54

drivers/iio/imu/adis16480.c

+97 −0
Original line number Diff line number Diff line
@@ -453,6 +453,13 @@ static const unsigned int adis16480_def_filter_freqs[] = { 
	63,

};



static const unsigned int adis16495_def_filter_freqs[] = {

	300,

	100,

	300,

	100,

};



static const unsigned int ad16480_filter_data[][2] = {

	[ADIS16480_SCAN_GYRO_X]		= { ADIS16480_REG_FILTER_BNK0, 0 },

	[ADIS16480_SCAN_GYRO_Y]		= { ADIS16480_REG_FILTER_BNK0, 3 },
@@ -713,6 +720,12 @@ enum adis16480_variant { 
	ADIS16480,

	ADIS16485,

	ADIS16488,

	ADIS16495_1,

	ADIS16495_2,

	ADIS16495_3,

	ADIS16497_1,

	ADIS16497_2,

	ADIS16497_3,

};



static const struct adis16480_chip_info adis16480_chip_info[] = {
@@ -769,6 +782,78 @@ static const struct adis16480_chip_info adis16480_chip_info[] = { 
		.max_dec_rate = 2048,

		.filter_freqs = adis16480_def_filter_freqs,

	},

	[ADIS16495_1] = {

		.channels = adis16485_channels,

		.num_channels = ARRAY_SIZE(adis16485_channels),

		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),

		.gyro_max_scale = 125,

		.accel_max_val = IIO_M_S_2_TO_G(32000),

		.accel_max_scale = 8,

		.temp_scale = 12500, /* 12.5 milli degree Celsius */

		.int_clk = 4250000,

		.max_dec_rate = 4250,

		.filter_freqs = adis16495_def_filter_freqs,

	},

	[ADIS16495_2] = {

		.channels = adis16485_channels,

		.num_channels = ARRAY_SIZE(adis16485_channels),

		.gyro_max_val = IIO_RAD_TO_DEGREE(18000),

		.gyro_max_scale = 450,

		.accel_max_val = IIO_M_S_2_TO_G(32000),

		.accel_max_scale = 8,

		.temp_scale = 12500, /* 12.5 milli degree Celsius */

		.int_clk = 4250000,

		.max_dec_rate = 4250,

		.filter_freqs = adis16495_def_filter_freqs,

	},

	[ADIS16495_3] = {

		.channels = adis16485_channels,

		.num_channels = ARRAY_SIZE(adis16485_channels),

		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),

		.gyro_max_scale = 2000,

		.accel_max_val = IIO_M_S_2_TO_G(32000),

		.accel_max_scale = 8,

		.temp_scale = 12500, /* 12.5 milli degree Celsius */

		.int_clk = 4250000,

		.max_dec_rate = 4250,

		.filter_freqs = adis16495_def_filter_freqs,

	},

	[ADIS16497_1] = {

		.channels = adis16485_channels,

		.num_channels = ARRAY_SIZE(adis16485_channels),

		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),

		.gyro_max_scale = 125,

		.accel_max_val = IIO_M_S_2_TO_G(32000),

		.accel_max_scale = 40,

		.temp_scale = 12500, /* 12.5 milli degree Celsius */

		.int_clk = 4250000,

		.max_dec_rate = 4250,

		.filter_freqs = adis16495_def_filter_freqs,

	},

	[ADIS16497_2] = {

		.channels = adis16485_channels,

		.num_channels = ARRAY_SIZE(adis16485_channels),

		.gyro_max_val = IIO_RAD_TO_DEGREE(18000),

		.gyro_max_scale = 450,

		.accel_max_val = IIO_M_S_2_TO_G(32000),

		.accel_max_scale = 40,

		.temp_scale = 12500, /* 12.5 milli degree Celsius */

		.int_clk = 4250000,

		.max_dec_rate = 4250,

		.filter_freqs = adis16495_def_filter_freqs,

	},

	[ADIS16497_3] = {

		.channels = adis16485_channels,

		.num_channels = ARRAY_SIZE(adis16485_channels),

		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),

		.gyro_max_scale = 2000,

		.accel_max_val = IIO_M_S_2_TO_G(32000),

		.accel_max_scale = 40,

		.temp_scale = 12500, /* 12.5 milli degree Celsius */

		.int_clk = 4250000,

		.max_dec_rate = 4250,

		.filter_freqs = adis16495_def_filter_freqs,

	},

};



static const struct iio_info adis16480_info = {
@@ -1014,6 +1099,12 @@ static const struct spi_device_id adis16480_ids[] = { 
	{ "adis16480", ADIS16480 },

	{ "adis16485", ADIS16485 },

	{ "adis16488", ADIS16488 },

	{ "adis16495-1", ADIS16495_1 },

	{ "adis16495-2", ADIS16495_2 },

	{ "adis16495-3", ADIS16495_3 },

	{ "adis16497-1", ADIS16497_1 },

	{ "adis16497-2", ADIS16497_2 },

	{ "adis16497-3", ADIS16497_3 },

	{ }

};

MODULE_DEVICE_TABLE(spi, adis16480_ids);
@@ -1023,6 +1114,12 @@ static const struct of_device_id adis16480_of_match[] = { 
	{ .compatible = "adi,adis16480" },

	{ .compatible = "adi,adis16485" },

	{ .compatible = "adi,adis16488" },

	{ .compatible = "adi,adis16495-1" },

	{ .compatible = "adi,adis16495-2" },

	{ .compatible = "adi,adis16495-3" },

	{ .compatible = "adi,adis16497-1" },

	{ .compatible = "adi,adis16497-2" },

	{ .compatible = "adi,adis16497-3" },

	{ },

};

MODULE_DEVICE_TABLE(of, adis16480_of_match);

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