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authorFabrice Gasnier <fabrice.gasnier@st.com>2019-04-15 12:47:22 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-04-22 13:34:14 +0300
commit20c89b4d1dc4e7cc329d00edcaf7a7aa14278557 (patch)
tree0e2690c570221b5f5f48bf88549f2f8716f1d8bd /include/linux/iio
parent9c6126940d646e441c292422c0b33902263c5425 (diff)
downloadlinux-20c89b4d1dc4e7cc329d00edcaf7a7aa14278557.tar.xz
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: 11646e81d775 ("iio: adc: stm32-dfsdm: add support for buffer modes") Reported-by: Randy Dunlap <rdunlap@infradead.org> Fix-suggested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'include/linux/iio')
-rw-r--r--include/linux/iio/timer/stm32-timer-trigger.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/iio/timer/stm32-timer-trigger.h b/include/linux/iio/timer/stm32-timer-trigger.h
index d68add80ab86..cbb7c7ae6c0c 100644
--- a/include/linux/iio/timer/stm32-timer-trigger.h
+++ b/include/linux/iio/timer/stm32-timer-trigger.h
@@ -73,6 +73,15 @@
#define TIM17_OC1 "tim17_oc1"
+#if IS_REACHABLE(CONFIG_IIO_STM32_TIMER_TRIGGER)
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