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| author | Francesco Lavra <flavra@baylibre.com> | 2026-01-15 20:53:48 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2026-01-16 22:38:31 +0300 |
| commit | a99b000f92413f254a6dc0f6ab88b310152f9485 (patch) | |
| tree | f75c3f32eff2dbf6adae789cdf4de11b3332589d | |
| parent | bac5e3d20c45392120c4298c2f66fc4387776b80 (diff) | |
| download | linux-a99b000f92413f254a6dc0f6ab88b310152f9485.tar.xz | |
iio: accel: adxl380: Store sampling frequency index in odr struct member
The ADXL380 driver assumes that acceleration samples are always retrieved
via the high-performance DSM signal path; as a result, the sampling
frequency value depends exclusively on the decimation filter settings in
the TRIG_CFG register.
In preparation for adding support for sampling frequency values that rely
on the low-power SAR signal path (on which the decimation filters are not
supported), use the (currently unused) 'odr' member of struct adxl380_state
to store the sampling frequency value, and when userspace requests the
current frequency value, retrieve it from the struct instead of calculating
it from the decimation filter settings.
Signed-off-by: Francesco Lavra <flavra@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/iio/accel/adxl380.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/iio/accel/adxl380.c b/drivers/iio/accel/adxl380.c index 6d5f1a0d51e9..28caa88d7c32 100644 --- a/drivers/iio/accel/adxl380.c +++ b/drivers/iio/accel/adxl380.c @@ -417,17 +417,7 @@ static int adxl380_read_chn(struct adxl380_state *st, u8 addr) static int adxl380_get_odr(struct adxl380_state *st, int *odr) { - int ret; - unsigned int trig_cfg, odr_idx; - - ret = regmap_read(st->regmap, ADXL380_TRIG_CFG_REG, &trig_cfg); - if (ret) - return ret; - - odr_idx = (FIELD_GET(ADXL380_TRIG_CFG_SINC_RATE_MSK, trig_cfg) << 1) | - (FIELD_GET(ADXL380_TRIG_CFG_DEC_2X_MSK, trig_cfg) & 1); - - *odr = st->chip_info->samp_freq_tbl[odr_idx]; + *odr = st->chip_info->samp_freq_tbl[st->odr]; return 0; } @@ -500,6 +490,7 @@ static int adxl380_set_odr(struct adxl380_state *st, u8 odr) if (ret) return ret; + st->odr = odr; ret = adxl380_set_measure_en(st, true); if (ret) return ret; |