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Subject[PATCH V1 4/6] iio: accel: sca3300: Add support for SCL3300
Date
Add support for Murata SCL3300, a 3-axis MEMS inclination.
same as SCA3300, it has accel and temperature output.

Datasheet link:
www.murata.com/en-us/products/sensor/inclinometer/overview/lineup/scl3300

Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>
---
drivers/iio/accel/sca3300.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/accel/sca3300.c b/drivers/iio/accel/sca3300.c
index 26e6fab88a8f..7ea3e202d474 100644
--- a/drivers/iio/accel/sca3300.c
+++ b/drivers/iio/accel/sca3300.c
@@ -68,7 +68,6 @@ static const struct iio_enum sca3300_op_mode_enum = {
.get = sca3300_get_op_mode,
.set = sca3300_set_op_mode,
};
-
static const struct iio_chan_spec_ext_info sca3300_ext_info[] = {
IIO_ENUM("op_mode", IIO_SHARED_BY_DIR, &sca3300_op_mode_enum),
IIO_ENUM_AVAILABLE("op_mode", &sca3300_op_mode_enum),
@@ -77,6 +76,7 @@ static const struct iio_chan_spec_ext_info sca3300_ext_info[] = {

enum sca3300_chip_type {
CHIP_SCA3300 = 0,
+ CHIP_SCL3300,
CHIP_CNT
};

@@ -131,12 +131,23 @@ static const struct iio_chan_spec sca3300_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(4)
};

+static const struct iio_chan_spec scl3300_channels[] = {
+ SCA3300_ACCEL_CHANNEL(SCA3300_ACC_X, 0x1, X),
+ SCA3300_ACCEL_CHANNEL(SCA3300_ACC_Y, 0x2, Y),
+ SCA3300_ACCEL_CHANNEL(SCA3300_ACC_Z, 0x3, Z),
+ SCA3300_TEMP_CHANNEL(SCA3300_TEMP, 0x05),
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+
static const int sca3300_lp_freq[CHIP_CNT][OP_MOD_CNT] = {
[CHIP_SCA3300] = {70, 70, 70, 10},
+ [CHIP_SCL3300] = {40, 70, 10, 10},
};

static const int sca3300_accel_scale[CHIP_CNT][OP_MOD_CNT][2] = {
[CHIP_SCA3300] = {{0, 370}, {0, 741}, {0, 185}, {0, 185}},
+ [CHIP_SCL3300] = {{0, 167}, {0, 333}, {0, 83}, {0, 83}}
};

static const unsigned long sca3300_scan_masks[] = {
@@ -184,6 +195,14 @@ static const struct sca3300_chip_info sca3300_chip_info_tbl[] = {
.num_channels = ARRAY_SIZE(sca3300_channels),
.scan_masks = sca3300_scan_masks,
},
+ [CHIP_SCL3300] = {
+ .chip_type = CHIP_SCL3300,
+ .name = "scl3300",
+ .chip_id = 0xC1,
+ .channels = scl3300_channels,
+ .num_channels = ARRAY_SIZE(scl3300_channels),
+ .scan_masks = sca3300_scan_masks,
+ },
};

DECLARE_CRC8_TABLE(sca3300_crc_table);
@@ -310,10 +329,14 @@ static int sca3300_write_raw(struct iio_dev *indio_dev,
}
return -EINVAL;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ if (data->chip_info->chip_type == CHIP_SCL3300) {
+ /*SCL3300 freq.tied to accel scale, not allowed to set separately.*/
+ return -EINVAL;
+ }
ret = sca3300_read_reg(data, SCA3300_REG_MODE, &reg_val);
if (ret)
return ret;
- /* freq. change is possible only for mode 3 and 4 */
+ /* SCA330 freq. change is possible only for mode 3 and 4 */
if (reg_val == 2 && val == sca3300_lp_freq[data->chip_info->chip_type][3])
return sca3300_write_reg(data, SCA3300_REG_MODE, 3);
if (reg_val == 3 && val == sca3300_lp_freq[data->chip_info->chip_type][2])
@@ -459,7 +482,6 @@ static int sca3300_read_avail(struct iio_dev *indio_dev,
long mask)
{
struct sca3300_data *data = iio_priv(indio_dev);
-
switch (mask) {
case IIO_CHAN_INFO_SCALE:
if (chan->type == IIO_ACCEL) {
@@ -553,6 +575,7 @@ static int sca3300_probe(struct spi_device *spi)

static const struct of_device_id sca3300_dt_ids[] = {
{ .compatible = "murata,sca3300"},
+ { .compatible = "murata,scl3300"},
{}
};
MODULE_DEVICE_TABLE(of, sca3300_dt_ids);
--
2.25.1
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