From: Necip Fazil Yildiran fazilyildiran@gmail.com
[ Upstream commit 676650d007e06fddcf3fe38238251d71bd179641 ]
When TOUCHSCREEN_ADC is enabled and IIO_BUFFER is disabled, it results in the following Kbuild warning:
WARNING: unmet direct dependencies detected for IIO_BUFFER_CB Depends on [n]: IIO [=y] && IIO_BUFFER [=n] Selected by [y]: - TOUCHSCREEN_ADC [=y] && !UML && INPUT [=y] && INPUT_TOUCHSCREEN [=y] && IIO [=y]
The reason is that TOUCHSCREEN_ADC selects IIO_BUFFER_CB without depending on or selecting IIO_BUFFER while IIO_BUFFER_CB depends on IIO_BUFFER. This can also fail building the kernel.
Honor the kconfig dependency to remove unmet direct dependency warnings and avoid any potential build failures.
Fixes: aa132ffb6b0a ("input: touchscreen: resistive-adc-touch: add generic resistive ADC touchscreen") Signed-off-by: Necip Fazil Yildiran fazilyildiran@gmail.com Acked-by: Jonathan Cameron Jonathan.Cameron@huawei.com Link: https://lore.kernel.org/r/20201102221504.541279-1-fazilyildiran@gmail.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/touchscreen/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 46ad9090493bb..1e812a193ce7a 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -96,6 +96,7 @@ config TOUCHSCREEN_AD7879_SPI config TOUCHSCREEN_ADC tristate "Generic ADC based resistive touchscreen" depends on IIO + select IIO_BUFFER select IIO_BUFFER_CB help Say Y here if you want to use the generic ADC