Commit 20c89b4d authored by Fabrice Gasnier's avatar Fabrice Gasnier Committed by Jonathan Cameron

iio: trigger: stm32-timer: fix build issue when disabled

This fixes a build issue when CONFIG_IIO_STM32_TIMER_TRIGGER isn't set but
used in stm32-dfsdm-adc driver (e.g. CONFIG_STM32_DFSDM_ADC is set):
ERROR: "is_stm32_timer_trigger" [drivers/iio/adc/stm32-dfsdm-adc.ko]
undefined!

There are two possible options to fix this issue:
- select IIO_STM32_TIMER_TRIGGER along with CONFIG_STM32_DFSDM_ADC.
  This is what's being done currently for CONFIG_STM32_ADC.
- stub "is_stm32_timer_trigger" function

Choice is made to stub this function as suggested in [1]. This is also
inspired by similar "is_stm32_lptim_trigger" function (see [2]) in
include/linux/iio/timer/stm32-lptim-trigger.h

[1]
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1977377.html
[2] https://lkml.org/lkml/2017/9/10/124

Fixes: 11646e81 ("iio: adc: stm32-dfsdm: add support for buffer modes")
Reported-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Fix-suggested-by: default avatarJonathan Cameron <jic23@kernel.org>
Signed-off-by: default avatarFabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 9c612694
...@@ -73,6 +73,15 @@ ...@@ -73,6 +73,15 @@
#define TIM17_OC1 "tim17_oc1" #define TIM17_OC1 "tim17_oc1"
#if IS_REACHABLE(CONFIG_IIO_STM32_TIMER_TRIGGER)
bool is_stm32_timer_trigger(struct iio_trigger *trig); bool is_stm32_timer_trigger(struct iio_trigger *trig);
#else
static inline bool is_stm32_timer_trigger(struct iio_trigger *trig)
{
#if IS_ENABLED(CONFIG_IIO_STM32_TIMER_TRIGGER)
pr_warn_once("stm32-timer-trigger not linked in\n");
#endif
return false;
}
#endif
#endif #endif
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment