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Thu, 10 Sep 2026 13:37:48 -0400 From: Janani Sunil Date: Thu, 10 Sep 2026 19:36:34 +0200 Subject: [PATCH v7 16/17] iio: adc: ad7768: Register GPIO auxiliary device Precedence: bulk X-Mailing-List: devicetree@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: <20260910-ad7768-driver-v7-16-7f70b07627e1@analog.com> References: <20260910-ad7768-driver-v7-0-7f70b07627e1@analog.com> In-Reply-To: <20260910-ad7768-driver-v7-0-7f70b07627e1@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 , Randy Dunlap CC: , , , , , , , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Janani Sunil , Jonathan Cameron X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; 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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/Kconfig | 1 + drivers/iio/adc/ad7768.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index c784bee0fd65..dea25315ed20 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -435,6 +435,7 @@ config AD7768 tristate "Analog Devices AD7768/AD7768-4 ADC driver" depends on SPI select REGULATOR + select AUXILIARY_BUS select IIO_BUFFER select IIO_BACKEND select REGMAP diff --git a/drivers/iio/adc/ad7768.c b/drivers/iio/adc/ad7768.c index b854c10467a2..24a963ad2bf4 100644 --- a/drivers/iio/adc/ad7768.c +++ b/drivers/iio/adc/ad7768.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -1265,6 +1266,30 @@ static const struct iio_info ad7768_info = { .update_scan_mode = ad7768_update_scan_mode, }; +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_configure_precharge_buffers(struct iio_dev *indio_dev, struct ad7768_precharge_config *precharge_cfg) { @@ -1837,6 +1862,10 @@ static int ad7768_probe(struct spi_device *spi) return dev_err_probe(dev, ret, "Failed to register VCM regulator\n"); + ret = ad7768_gpio_adev_init(st); + if (ret) + return ret; + return devm_iio_device_register(dev, indio_dev); } -- 2.43.0