From: Francesco Lavra Date: Thu, 15 Jan 2026 17:53:48 +0000 (+0100) Subject: iio: accel: adxl380: Store sampling frequency index in odr struct member X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a99b000f92413f254a6dc0f6ab88b310152f9485;p=thirdparty%2Fkernel%2Flinux.git 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 Reviewed-by: Nuno Sá Signed-off-by: Jonathan Cameron --- 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;