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Thu, 12 Feb 2026 10:20:24 -0800 (PST) From: Taha Ed-Dafili <0rayn.dev@gmail.com> To: Jonathan Cameron , Lars-Peter Clausen , Michael Hennerich , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mentees@lists.linuxfoundation.org, me@brighamcampbell.com, skhan@linuxfoundation.org, Taha Ed-Dafili <0rayn.dev@gmail.com> Subject: [PATCH v1 2/2] iio: dac: ad5504: use adi,output-range-volts for scale calculation Date: Thu, 12 Feb 2026 19:19:55 +0100 Message-ID: <20260212181955.42724-3-0rayn.dev@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260212181955.42724-1-0rayn.dev@gmail.com> References: <20260212181955.42724-1-0rayn.dev@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The driver previously used VCC to calculate the scale, but the datasheet states the output range is fixed by the R_SEL pin (0-30V or 0-60V). Update probe to read `adi,output-range-volts` for the scale. Default to the 60V range if the property is missing, while keeping the VCC regulator enable for power. Suggested-by: David Lechner Signed-off-by: Taha Ed-Dafili <0rayn.dev@gmail.com> --- drivers/iio/dac/ad5504.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/drivers/iio/dac/ad5504.c b/drivers/iio/dac/ad5504.c index 355bcb6a8ba0..1796a9b1e750 100644 --- a/drivers/iio/dac/ad5504.c +++ b/drivers/iio/dac/ad5504.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -274,6 +275,7 @@ static int ad5504_probe(struct spi_device *spi) struct iio_dev *indio_dev; struct ad5504_state *st; int ret; + u32 val; indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); if (!indio_dev) @@ -281,17 +283,21 @@ static int ad5504_probe(struct spi_device *spi) st = iio_priv(indio_dev); - ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vcc"); - if (ret < 0 && ret != -ENODEV) + ret = devm_regulator_get_enable(&spi->dev, "vcc"); + if (ret) return ret; - if (ret == -ENODEV) { - if (pdata->vref_mv) - st->vref_mv = pdata->vref_mv; - else - dev_warn(&spi->dev, "reference voltage unspecified\n"); - } else { - st->vref_mv = ret / 1000; - } + + ret = device_property_read_u32(&spi->dev, "adi,output-range-volts", &val); + if (ret) + val = 60; + + if (val == 60) + st->vref_mv = 60000; + else + st->vref_mv = 30000; + + if (pdata && pdata->vref_mv) + st->vref_mv = pdata->vref_mv; st->spi = spi; indio_dev->name = spi_get_device_id(st->spi)->name; -- 2.47.3