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Thu, 15 Jan 2026 09:53:53 -0800 (PST) From: Francesco Lavra To: Ramona Gradinariu , Antoniu Miclaus , Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] iio: accel: adxl380: Store sampling frequency index in odr struct member Date: Thu, 15 Jan 2026 18:53:48 +0100 Message-Id: <20260115175350.1045887-2-flavra@baylibre.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260115175350.1045887-1-flavra@baylibre.com> References: <20260115175350.1045887-1-flavra@baylibre.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Developer-Signature: v=1; a=openpgp-sha256; l=1826; i=flavra@baylibre.com; h=from:subject; bh=yyI20jVWNWTUy84I+ZyIFJqORDig0qSSVkjZPqANWQA=; b=owEB7QES/pANAwAKAe3xO3POlDZfAcsmYgBpaSmf4a/795W7rhjvH9CD+ZSoLIO4v3wGP6UBR xS+YsOn68uJAbMEAAEKAB0WIQSGV4VPlTvcox7DFObt8TtzzpQ2XwUCaWkpnwAKCRDt8TtzzpQ2 X1kHC/4hZHw4/46splV9XSMPLjH/FkNrL7aOvSWFfIRnPoUp2vjL9uGGvAQG7rqnm7gfmx6/iNc vocR7TfMtHjIAHddT0kJMwAuU2KBsVly/fPtOVgy5carT0jJgnz/VaUJ/68IyuWrno2ROOHIeWR 549Ord0hMvLWqbbAlD4b7culRBDeFc6w8VI/aG3tEaDhLB12DUH/h6Vu+xgq0Uson5bXmIl5cae PnzhhwqNhBmr53E9puAF50bcRmtDIrJFFdiSK6nJHguNCbQqSFxhplYfJWuSqGRUordD6cDSDXN ytsvs1dt6nC5Jh+LQkl2eUN9vymzkcvfDWhSRv6nTcvJo0tfpQ+k4Vsunc2jNIXS9eFA1WRKrX2 q5F3EYHImSZADzM+9eI/jjtgzYSfbI2V4/lfET7adTiQkp7/k2u5/+DT08459+65pFwMFsb6J6g ljRSyV2f4ktEyd1LT0uiMb708JRjdN7+WFGIHiUtepfoeaIRLRg8bBJAabWVQ0TMw6y/M= X-Developer-Key: i=flavra@baylibre.com; a=openpgp; fpr=8657854F953BDCA31EC314E6EDF13B73CE94365F Content-Transfer-Encoding: quoted-printable 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 S=C3=A1 --- drivers/iio/accel/adxl380.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/drivers/iio/accel/adxl380.c b/drivers/iio/accel/adxl380.c index ce3643c5deb8..bbf1f88ca781 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) =20 static int adxl380_get_odr(struct adxl380_state *st, int *odr) { - int ret; - unsigned int trig_cfg, odr_idx; - - ret =3D regmap_read(st->regmap, ADXL380_TRIG_CFG_REG, &trig_cfg); - if (ret) - return ret; - - odr_idx =3D (FIELD_GET(ADXL380_TRIG_CFG_SINC_RATE_MSK, trig_cfg) << 1) | - (FIELD_GET(ADXL380_TRIG_CFG_DEC_2X_MSK, trig_cfg) & 1); - - *odr =3D st->chip_info->samp_freq_tbl[odr_idx]; + *odr =3D st->chip_info->samp_freq_tbl[st->odr]; =20 return 0; } @@ -500,6 +490,7 @@ static int adxl380_set_odr(struct adxl380_state *st, u8= odr) if (ret) return ret; =20 + st->odr =3D odr; ret =3D adxl380_set_measure_en(st, true); if (ret) return ret; --=20 2.39.5