gain_gpio 63 drivers/iio/adc/ad7780.c struct gpio_desc *gain_gpio; gain_gpio 167 drivers/iio/adc/ad7780.c gpiod_set_value(st->gain_gpio, gain); gain_gpio 262 drivers/iio/adc/ad7780.c st->gain_gpio = devm_gpiod_get_optional(dev, gain_gpio 265 drivers/iio/adc/ad7780.c if (IS_ERR(st->gain_gpio)) { gain_gpio 266 drivers/iio/adc/ad7780.c ret = PTR_ERR(st->gain_gpio);