From: Rodrigo Alencar <[email protected]> If wired LADC, should be held low when unused (pin is active-low), which allows for synchronous DAC updates. This will be used to update all the channels at the same time when adding buffer support.
Signed-off-by: Rodrigo Alencar <[email protected]> --- drivers/iio/dac/ad5686.c | 5 +++++ drivers/iio/dac/ad5686.h | 3 +++ 2 files changed, 8 insertions(+) diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c index f239880d1cc7..d37b4902766f 100644 --- a/drivers/iio/dac/ad5686.c +++ b/drivers/iio/dac/ad5686.c @@ -551,6 +551,11 @@ int ad5686_probe(struct device *dev, return dev_err_probe(dev, PTR_ERR(rstc), "Failed to get reset controller\n"); + st->ldac_gpio = devm_gpiod_get_optional(dev, "ldac", GPIOD_OUT_HIGH); + if (IS_ERR(st->ldac_gpio)) + return dev_err_probe(dev, PTR_ERR(st->ldac_gpio), + "Failed to get LDAC GPIO\n"); + /* Set all the power down mode for all channels to 1K pulldown */ st->pwr_down_mode = ~0U; st->pwr_down_mask = ~0U; diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h index e2ed0a2a8ac9..3b7460178632 100644 --- a/drivers/iio/dac/ad5686.h +++ b/drivers/iio/dac/ad5686.h @@ -9,6 +9,7 @@ #define __DRIVERS_IIO_DAC_AD5686_H__ #include <linux/bits.h> +#include <linux/gpio/consumer.h> #include <linux/mutex.h> #include <linux/types.h> @@ -123,6 +124,7 @@ extern const struct ad5686_chip_info ad5679r_chip_info; * @dev: device instance * @chip_info: chip model specific constants, available modes etc * @ops: bus specific operations + * @ldac_gpio: LDAC pin GPIO descriptor * @vref_mv: actual reference voltage used * @pwr_down_mask: power down mask * @pwr_down_mode: current power down mode @@ -134,6 +136,7 @@ struct ad5686_state { struct device *dev; const struct ad5686_chip_info *chip_info; const struct ad5686_bus_ops *ops; + struct gpio_desc *ldac_gpio; unsigned short vref_mv; unsigned int pwr_down_mask; unsigned int pwr_down_mode; -- 2.43.0
