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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: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Stefan Popa 2019-02-27 18:14:27 +02:00 committed by Jonathan Cameron
parent 83ec2d5404
commit 82e7a1b250
1 changed files with 97 additions and 0 deletions
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97
drivers/iio/imu/adis16480.c
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@ -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);