From: Alexandru Ardelean alexandru.ardelean@analog.com
[ Upstream commit f091d7c5fe6cc39e916b50f90e3cac67a032d0be ]
This tries to solve a warning reported by the lkp bot:
drivers/iio/adc/at91_adc.c:1439:34: warning: unused variable 'at91_adc_dt_ids' [-Wunused-const-variable]
static const struct of_device_id at91_adc_dt_ids[] = { ^ 1 warning generated.
This warning has appeared after the AT91_ADC driver compilation has been enabled via the COMPILE_TEST symbol dependency.
The warning is caused by the 'of_match_ptr()' helper which returns NULL if OF is undefined. This driver should build only for device-tree context, so a dependency on the OF Kconfig symbol has been added. Also, the usage of of_match_ptr() helper has been removed since it shouldn't ever return NULL (because the driver should not be built for the non-OF context).
Fixes: 4027860dcc4c ("iio: Kconfig: at91_adc: add COMPILE_TEST dependency to driver") Reported-by: kernel test robot lkp@intel.com Signed-off-by: Alexandru Ardelean alexandru.ardelean@analog.com Reviewed-by: Alexandre Belloni alexandre.belloni@bootlin.com Link: https://lore.kernel.org/r/20200930135048.11530-4-alexandru.ardelean@analog.c... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/adc/Kconfig | 2 +- drivers/iio/adc/at91_adc.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 91ae90514aff4..17e9ceb9c6c48 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -295,7 +295,7 @@ config ASPEED_ADC config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 || COMPILE_TEST - depends on INPUT && SYSFS + depends on INPUT && SYSFS && OF select IIO_BUFFER select IIO_TRIGGERED_BUFFER help diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index 9b2c548fae957..0a793e7cd53ee 100644 --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -1469,7 +1469,7 @@ static struct platform_driver at91_adc_driver = { .id_table = at91_adc_ids, .driver = { .name = DRIVER_NAME, - .of_match_table = of_match_ptr(at91_adc_dt_ids), + .of_match_table = at91_adc_dt_ids, .pm = &at91_adc_pm_ops, }, };