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>

diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
index c90375da81291c909313ab69c986d867e9528802..28cece3cc868a68ddc0947673fd39e72d474c5ad 100644 (file)
--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -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);