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Fri, 5 Sep 2025 11:53:13 -0400 From: Jonathan Santos To: , , CC: Jonathan Santos , , , , , , , , , , Subject: [PATCH v3 2/4] iio: adc: ad7768-1: introduce chip info for future multidevice support Date: Fri, 5 Sep 2025 06:49:21 -0300 Message-ID: <098a8b2556ea95fdce5f81cbac98983f91ca1a9d.1757001160.git.Jonathan.Santos@analog.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: ZgnJVHFKKNt9ri1eskqsGkNg_7a3sNy0 X-Proofpoint-GUID: ZgnJVHFKKNt9ri1eskqsGkNg_7a3sNy0 X-Authority-Analysis: v=2.4 cv=LrKSymdc c=1 sm=1 tr=0 ts=68bb0775 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=yJojWOMRYYMA:10 a=gAnH3GRIAAAA:8 a=sPhFOdlt40sM3mM_3ZMA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTA1MDAxNiBTYWx0ZWRfX7F93Xh3NeXNz NOYvvOs/wv4lswkDbSiGGyT9Qp4TBfWtltgHkubJJ45d1rlAiEk+Gd47DJMoWK7k70Z398Z/gQf ljvyisR1iNUUlPgPH3cjly737Q3FEdWMqivO3YAzHguMVSdBvOVSWWCd3fGrHpxf87Y9b8KeiKP J8em9w3PIy4Y2ZOBlpKOaMcMNUD5n+LlwoEf83OlsKkjuHj14TCZ2QLHnCkCnFz/M8uM1XgItCP bIpHx3VxjszVuIEeLR2PA7I75XLWTB6G8S35+qn3IvjWTu479pAnjFcoO7TSx2jACv3o47e1AyZ v+CencsMUqh6sagvrWEu1Qg1mCroW5VmpxufbFctlkhzb/TC0vPkfhhYslBcDitZ/VOVhFZvF6l 9C7Xr34j X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-05_05,2025-09-04_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 clxscore=1015 phishscore=0 adultscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509050016 Content-Type: text/plain; charset="utf-8" Add Chip info struct in SPI device to store channel information for each supported part. Signed-off-by: Jonathan Santos --- v3 Changes: * ad7768_channel_masks removed along with available_masks element in ad7768_chip_info struct. It does not add anything for single channels, so not needed, at least for now. * fixed inconsistency in spaces before \ in AD7768_CHAN macro. v2 Changes: * removed AD7768_CHAN_INFO_NONE macro. * reordered fields in ad7768_chip_info struct. * removed trailing comma. --- drivers/iio/adc/ad7768-1.c | 67 +++++++++++++++++++++++++------------- 1 1 file changed, 44 insertions(+), 23 deletions(-) diff --git a/drivers/iio/adc/ad7768-1.c b/drivers/iio/adc/ad7768-1.c index 872c88d0c86c..000d294c616c 100644 --- a/drivers/iio/adc/ad7768-1.c +++ b/drivers/iio/adc/ad7768-1.c @@ -213,6 +213,12 @@ static const struct iio_scan_type ad7768_scan_type[] = =3D { }, }; =20 +struct ad7768_chip_info { + const char *name; + const struct iio_chan_spec *channel_spec; + int num_channels; +}; + struct ad7768_state { struct spi_device *spi; struct regmap *regmap; @@ -234,6 +240,7 @@ struct ad7768_state { struct gpio_desc *gpio_reset; const char *labels[AD7768_MAX_CHANNELS]; struct gpio_chip gpiochip; + const struct ad7768_chip_info *chip; bool en_spi_sync; /* * DMA (thus cache coherency maintenance) may require the @@ -748,24 +755,27 @@ static const struct iio_chan_spec_ext_info ad7768_ext= _info[] =3D { { } }; =20 +#define AD7768_CHAN(_idx, _msk_avail) { \ + .type =3D IIO_VOLTAGE, \ + .info_mask_separate_available =3D _msk_avail, \ + .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type =3D BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \ + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ + .info_mask_shared_by_type_available =3D BIT(IIO_CHAN_INFO_OVERSAMPLING_RA= TIO), \ + .info_mask_shared_by_all =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .info_mask_shared_by_all_available =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .ext_info =3D ad7768_ext_info, \ + .indexed =3D 1, \ + .channel =3D _idx, \ + .scan_index =3D _idx, \ + .has_ext_scan_type =3D 1, \ + .ext_scan_type =3D ad7768_scan_type, \ + .num_ext_scan_type =3D ARRAY_SIZE(ad7768_scan_type), \ +} + static const struct iio_chan_spec ad7768_channels[] =3D { - { - .type =3D IIO_VOLTAGE, - .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW), - .info_mask_shared_by_type =3D BIT(IIO_CHAN_INFO_SCALE) | - BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), - .info_mask_shared_by_type_available =3D BIT(IIO_CHAN_INFO_OVERSAMPLING_R= ATIO), - .info_mask_shared_by_all =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), - .info_mask_shared_by_all_available =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), - .ext_info =3D ad7768_ext_info, - .indexed =3D 1, - .channel =3D 0, - .scan_index =3D 0, - .has_ext_scan_type =3D 1, - .ext_scan_type =3D ad7768_scan_type, - .num_ext_scan_type =3D ARRAY_SIZE(ad7768_scan_type), - }, + AD7768_CHAN(0, 0), }; =20 static int ad7768_read_raw(struct iio_dev *indio_dev, @@ -1321,6 +1331,12 @@ static int ad7768_register_regulators(struct device = *dev, struct ad7768_state *s return 0; } =20 +static const struct ad7768_chip_info ad7768_chip_info =3D { + .name =3D "ad7768-1", + .channel_spec =3D ad7768_channels, + .num_channels =3D ARRAY_SIZE(ad7768_channels), +}; + static int ad7768_probe(struct spi_device *spi) { struct ad7768_state *st; @@ -1371,9 +1387,14 @@ static int ad7768_probe(struct spi_device *spi) =20 st->mclk_freq =3D clk_get_rate(st->mclk); =20 - indio_dev->channels =3D ad7768_channels; - indio_dev->num_channels =3D ARRAY_SIZE(ad7768_channels); - indio_dev->name =3D spi_get_device_id(spi)->name; + st->chip =3D spi_get_device_match_data(spi); + if (!st->chip) + return dev_err_probe(&spi->dev, -ENODEV, + "Could not find chip info data\n"); + + indio_dev->channels =3D st->chip->channel_spec; + indio_dev->num_channels =3D st->chip->num_channels; + indio_dev->name =3D st->chip->name; indio_dev->info =3D &ad7768_info; indio_dev->modes =3D INDIO_DIRECT_MODE; =20 @@ -1390,7 +1411,7 @@ static int ad7768_probe(struct spi_device *spi) =20 init_completion(&st->completion); =20 - ret =3D ad7768_set_channel_label(indio_dev, ARRAY_SIZE(ad7768_channels)); + ret =3D ad7768_set_channel_label(indio_dev, st->chip->num_channels); if (ret) return ret; =20 @@ -1409,13 +1430,13 @@ static int ad7768_probe(struct spi_device *spi) } =20 static const struct spi_device_id ad7768_id_table[] =3D { - { "ad7768-1", 0 }, + { "ad7768-1", (kernel_ulong_t)&ad7768_chip_info }, { } }; MODULE_DEVICE_TABLE(spi, ad7768_id_table); =20 static const struct of_device_id ad7768_of_match[] =3D { - { .compatible =3D "adi,ad7768-1" }, + { .compatible =3D "adi,ad7768-1", .data =3D &ad7768_chip_info }, { } }; MODULE_DEVICE_TABLE(of, ad7768_of_match); --=20 2.34.1