diff options
| author | Gwendal Grignou <gwendal@chromium.org> | 2022-04-29 15:01:42 -0700 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:11 +0100 |
| commit | 71783b07aa0b3a17be3dc4599e81426ad6dd6555 (patch) | |
| tree | 5a9725319f89dcc0808c0a38a923e59aa8d0a292 /drivers/iio/proximity | |
| parent | 67ac843324a569810dc6736e26bfdc362cdc8e24 (diff) | |
iio: sx9324: Add Setting for internal analog gain
Based on device tree setting, set the internal analog gain.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220429220144.1476049-9-gwendal@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/proximity')
| -rw-r--r-- | drivers/iio/proximity/sx9324.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/iio/proximity/sx9324.c b/drivers/iio/proximity/sx9324.c index 926a0da5915c..7f367f63e362 100644 --- a/drivers/iio/proximity/sx9324.c +++ b/drivers/iio/proximity/sx9324.c @@ -79,6 +79,7 @@ #define SX9324_REG_AFE_CTRL8_RESFILTIN_4KOHM 0x02 #define SX9324_REG_AFE_CTRL8_RESFILTIN_MASK GENMASK(3, 0) #define SX9324_REG_AFE_CTRL9 0x2d +#define SX9324_REG_AFE_CTRL9_AGAIN_MASK GENMASK(3, 0) #define SX9324_REG_AFE_CTRL9_AGAIN_1 0x08 #define SX9324_REG_PROX_CTRL0 0x30 @@ -941,6 +942,27 @@ sx9324_get_default_reg(struct device *dev, int idx, raw / 2000); break; + case SX9324_REG_AFE_CTRL9: + ret = device_property_read_u32(dev, + "semtech,input-analog-gain", &raw); + if (ret) + break; + /* + * The analog gain has the following setting: + * +---------+----------------+----------------+ + * | dt(raw) | physical value | register value | + * +---------+----------------+----------------+ + * | 0 | x1.247 | 6 | + * | 1 | x1 | 8 | + * | 2 | x0.768 | 11 | + * | 3 | x0.552 | 15 | + * +---------+----------------+----------------+ + */ + reg_def->def &= ~SX9324_REG_AFE_CTRL9_AGAIN_MASK; + reg_def->def |= FIELD_PREP(SX9324_REG_AFE_CTRL9_AGAIN_MASK, + 6 + raw * (raw + 3) / 2); + break; + case SX9324_REG_ADV_CTRL5: ret = device_property_read_u32(dev, "semtech,startup-sensor", &start); |