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Thu, 13 Aug 2026 09:58:02 -0400 From: Janani Sunil Date: Thu, 13 Aug 2026 15:57:03 +0200 Subject: [PATCH v3 10/14] iio: adc: ad7768: Register GPIO auxiliary device Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-ID: <20260813-ad7768-driver-v3-10-cb554399ad26@analog.com> References: <20260813-ad7768-driver-v3-0-cb554399ad26@analog.com> In-Reply-To: <20260813-ad7768-driver-v3-0-cb554399ad26@analog.com> To: =?utf-8?q?Nuno_S=C3=A1?= , Michael Hennerich , Jonathan Cameron , "David Lechner" , Andy Shevchenko , "Rob Herring" , Krzysztof Kozlowski , "Conor Dooley" , Olivier Moysan , Philipp Zabel , Linus Walleij , Bartosz Golaszewski , Jonathan Corbet , Shuah Khan , Michael Walle CC: , , , , , , , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Janani Sunil X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1786629444; l=1874; i=janani.sunil@analog.com; 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This allows the GPIO driver to share the parent regmap and runtime power-management state. Signed-off-by: Janani Sunil --- drivers/iio/adc/ad7768.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/iio/adc/ad7768.c b/drivers/iio/adc/ad7768.c index d7151b1fa863..6df219610b65 100644 --- a/drivers/iio/adc/ad7768.c +++ b/drivers/iio/adc/ad7768.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -1209,6 +1210,27 @@ static void ad7768_set_available_sampl_freq(struct ad7768_state *st) } } +static int ad7768_gpio_adev_init(struct ad7768_state *st) +{ + struct device *dev = regmap_get_device(st->regmap); + struct spi_device *spi = to_spi_device(dev); + struct auxiliary_device *adev; + int id; + + if (!device_property_read_bool(dev, "gpio-controller")) + return 0; + + /* Use the SPI bus number and chip select to derive a stable per-device ID. */ + id = (spi->controller->bus_num << 8) | spi_get_chipselect(spi, 0); + adev = __devm_auxiliary_device_create(dev, KBUILD_MODNAME, "gpio", + NULL, id); + if (!adev) + return dev_err_probe(dev, -ENODEV, + "Failed to create GPIO auxiliary device\n"); + + return 0; +} + static int ad7768_set_filter_mode(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, unsigned int mode) @@ -1585,6 +1607,10 @@ static int ad7768_probe(struct spi_device *spi) indio_dev->setup_ops = &ad7768_buffer_ops; + ret = ad7768_gpio_adev_init(st); + if (ret) + return ret; + ret = devm_iio_device_register(dev, indio_dev); if (ret) return ret; -- 2.43.0