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Thu, 11 Sep 2025 14:42:53 -0700 (PDT) From: David Lechner Date: Thu, 11 Sep 2025 16:42:01 -0500 Subject: [PATCH v2 2/6] iio: adc: ad7124: use read_avail() for scale_available 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" Content-Transfer-Encoding: quoted-printable Message-Id: <20250911-iio-adc-ad7124-add-filter-support-v2-2-b09f492416c7@baylibre.com> References: <20250911-iio-adc-ad7124-add-filter-support-v2-0-b09f492416c7@baylibre.com> In-Reply-To: <20250911-iio-adc-ad7124-add-filter-support-v2-0-b09f492416c7@baylibre.com> To: Michael Hennerich , Jonathan Cameron , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2868; i=dlechner@baylibre.com; h=from:subject:message-id; bh=Mv7NRoKazrA+jxppM7YWklFA4jjQpodozntDXuzzUWQ=; b=owEBbQGS/pANAwAKAcLMIAH/AY/AAcsmYgBow0I548qg/Y0Q+grQU4jHpD889qfkAbWg+zU5F lBmVRdaAIeJATMEAAEKAB0WIQTsGNmeYg6D1pzYaJjCzCAB/wGPwAUCaMNCOQAKCRDCzCAB/wGP wC/EB/4yLP8om2BoNqj+q226cUR2Eprk2uT61JPkmYat+prl7guoeU+zdRvlMrvLbnZdgIvnJR/ 4HMbbQqXhAxQXGy6/g6jHT6jyLNSWzBJXeoKiB+3owEkMVPU+joun/y7adqD3dwLU/ilPSlBwRu Zt8/3O+PLH41rR2XgMCnD1N/oSZS1wWheBJphC9iZnWBcAtsm8BtZdOm7cye2w1gmoQDmOCtBfh Xn2M/3wxrbSCpLUEX2WjA++NRMu6+qqrw95EWTa5lj5YdeCj8tJ1PLL69AAo/LipOUY2mXZgJ+q noeOlyWDfiWiE7px71Hryq8uhaAIJFGAbhg0fao65G+4N37G X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Replace custom attribute with the standard IIO read_avail() callback to provide in_voltage_scale_available attribute. Signed-off-by: David Lechner --- drivers/iio/adc/ad7124.c | 42 +++++++++++++++++++++++++++++------------- 1 file changed, 29 insertions(+), 13 deletions(-) diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index 8f6ca33d0c902be4ada103a32f37855c82a5f2fc..97d601b3387524fe411cc0afc73= 6618e32759880 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -621,6 +621,33 @@ static const struct ad_sigma_delta_info ad7124_sigma_d= elta_info =3D { .num_resetclks =3D 64, }; =20 +static const int ad7124_voltage_scales[][2] =3D { + { 0, 1164 }, + { 0, 2328 }, + { 0, 4656 }, + { 0, 9313 }, + { 0, 18626 }, + { 0, 37252 }, + { 0, 74505 }, + { 0, 149011 }, + { 0, 298023 }, +}; + +static int ad7124_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, long info) +{ + switch (info) { + case IIO_CHAN_INFO_SCALE: + *vals =3D (const int *)ad7124_voltage_scales; + *type =3D IIO_VAL_INT_PLUS_NANO; + *length =3D ARRAY_SIZE(ad7124_voltage_scales) * 2; + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + static int ad7124_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long info) @@ -775,18 +802,6 @@ static int ad7124_reg_access(struct iio_dev *indio_dev, return ret; } =20 -static IIO_CONST_ATTR(in_voltage_scale_available, - "0.000001164 0.000002328 0.000004656 0.000009313 0.000018626 0.000037252 = 0.000074505 0.000149011 0.000298023"); - -static struct attribute *ad7124_attributes[] =3D { - &iio_const_attr_in_voltage_scale_available.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad7124_attrs_group =3D { - .attrs =3D ad7124_attributes, -}; - static int ad7124_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { @@ -816,12 +831,12 @@ static int ad7124_update_scan_mode(struct iio_dev *in= dio_dev, } =20 static const struct iio_info ad7124_info =3D { + .read_avail =3D ad7124_read_avail, .read_raw =3D ad7124_read_raw, .write_raw =3D ad7124_write_raw, .debugfs_reg_access =3D &ad7124_reg_access, .validate_trigger =3D ad_sd_validate_trigger, .update_scan_mode =3D ad7124_update_scan_mode, - .attrs =3D &ad7124_attrs_group, }; =20 /* Only called during probe, so dev_err_probe() can be used */ @@ -1011,6 +1026,7 @@ static const struct iio_chan_spec ad7124_channel_temp= late =3D { BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), + .info_mask_shared_by_type_available =3D BIT(IIO_CHAN_INFO_SCALE), .scan_type =3D { .sign =3D 'u', .realbits =3D 24, --=20 2.43.0