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iio: accel: st_accel: Add support for Silan SC7A20
This chip appears to be register-compatible with the LIS2DH. The new description is a copy of the LIS2DH's description with a different WAI value. Datasheet: http://linux-chenxing.org/silan/SC7A20-SilanMicroelectronics.pdf Datasheet: http://www.siitek.com.cn/Upfiles/down/SC7A20说明书_0.92(智能穿戴).pdf Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20220202235049.8051-4-samuel@sholland.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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3 changed files with 90 additions and 0 deletions
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@ -36,6 +36,7 @@ enum st_accel_type {
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LIS3DHH,
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LIS2DE12,
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LIS2HH12,
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SC7A20,
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ST_ACCEL_MAX,
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};
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@ -61,6 +62,7 @@ enum st_accel_type {
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#define LIS3DE_ACCEL_DEV_NAME "lis3de"
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#define LIS2DE12_ACCEL_DEV_NAME "lis2de12"
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#define LIS2HH12_ACCEL_DEV_NAME "lis2hh12"
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#define SC7A20_ACCEL_DEV_NAME "sc7a20"
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#ifdef CONFIG_IIO_BUFFER
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int st_accel_allocate_ring(struct iio_dev *indio_dev);
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@ -1087,6 +1087,89 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
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.multi_read_bit = true,
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.bootime = 2,
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},
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{
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/*
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* Not an ST part. Register-compatible with the LIS2DH, even
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* though the WAI value is different.
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*/
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.wai = 0x11,
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
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.sensors_supported = {
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[0] = SC7A20_ACCEL_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
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.odr = {
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.addr = 0x20,
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.mask = 0xf0,
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.odr_avl = {
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{ .hz = 1, .value = 0x01, },
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{ .hz = 10, .value = 0x02, },
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{ .hz = 25, .value = 0x03, },
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{ .hz = 50, .value = 0x04, },
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{ .hz = 100, .value = 0x05, },
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{ .hz = 200, .value = 0x06, },
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{ .hz = 400, .value = 0x07, },
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{ .hz = 1600, .value = 0x08, },
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},
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},
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.pw = {
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.addr = 0x20,
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.mask = 0xf0,
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
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},
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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = 0x23,
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.mask = 0x30,
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.fs_avl = {
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[0] = {
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.num = ST_ACCEL_FS_AVL_2G,
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.value = 0x00,
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.gain = IIO_G_TO_M_S_2(1000),
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},
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[1] = {
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.num = ST_ACCEL_FS_AVL_4G,
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.value = 0x01,
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.gain = IIO_G_TO_M_S_2(2000),
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},
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[2] = {
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.num = ST_ACCEL_FS_AVL_8G,
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.value = 0x02,
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.gain = IIO_G_TO_M_S_2(4000),
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},
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[3] = {
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.num = ST_ACCEL_FS_AVL_16G,
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.value = 0x03,
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.gain = IIO_G_TO_M_S_2(12000),
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},
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},
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},
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.bdu = {
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.addr = 0x23,
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.mask = 0x80,
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},
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.drdy_irq = {
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.int1 = {
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.addr = 0x22,
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.mask = 0x10,
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},
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.addr_ihl = 0x25,
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.mask_ihl = 0x02,
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.stat_drdy = {
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.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
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.mask = 0x07,
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},
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},
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.sim = {
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.addr = 0x23,
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.value = BIT(0),
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},
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.multi_read_bit = true,
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.bootime = 2,
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},
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};
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/* Default accel DRDY is available on INT1 pin */
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@ -107,6 +107,10 @@ static const struct of_device_id st_accel_of_match[] = {
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.compatible = "st,lis2hh12",
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.data = LIS2HH12_ACCEL_DEV_NAME,
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},
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{
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.compatible = "silan,sc7a20",
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.data = SC7A20_ACCEL_DEV_NAME,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, st_accel_of_match);
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@ -142,6 +146,7 @@ static const struct i2c_device_id st_accel_id_table[] = {
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{ LIS3DE_ACCEL_DEV_NAME },
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{ LIS2DE12_ACCEL_DEV_NAME },
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{ LIS2HH12_ACCEL_DEV_NAME },
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{ SC7A20_ACCEL_DEV_NAME },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
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