From: YueHaibing <yuehaibing@xxxxxxxxxx> When building with CONFIG_GPIOLIB is not set gcc warns this: drivers/iio/adc/ti-ads7950.c:75:19: error: field chip has incomplete type struct gpio_chip chip; ^~~~ drivers/iio/adc/ti-ads7950.c: In function ti_ads7950_set: drivers/iio/adc/ti-ads7950.c:409:32: error: implicit declaration of function gpiochip_get_data; did you mean acpi_get_data? [-Werror=implicit-function-declaration] struct ti_ads7950_state *st = gpiochip_get_data(chip); ^~~~~~~~~~~~~~~~~ acpi_get_data Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Fixes: c97dce792dc8 ("iio: adc: ti-ads7950: add GPIO support") Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx> --- drivers/iio/adc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 846c7ac..f760269 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -968,7 +968,7 @@ config TI_ADS1015 config TI_ADS7950 tristate "Texas Instruments ADS7950 ADC driver" - depends on SPI + depends on SPI && GPIOLIB select IIO_BUFFER select IIO_TRIGGERED_BUFFER help -- 2.7.4