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Subject[PATCH 1/2] mfd: stm32-timers: fix pwm-stm32 linker issue with COMPILE_TEST
Date
This is seen when COMPILE_TEST=y and MFD_STM32_TIMERS=n.
drivers/pwm/pwm-stm32.o: In function 'stm32_pwm_raw_capture':
pwm-stm32.c:... undefined reference to 'stm32_timers_dma_burst_read'
Fixes: 0c6609805b63 ("mfd: stm32-timers: Add support for DMAs")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
include/linux/mfd/stm32-timers.h | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/include/linux/mfd/stm32-timers.h b/include/linux/mfd/stm32-timers.h
index 9da1d7e..067d146 100644
--- a/include/linux/mfd/stm32-timers.h
+++ b/include/linux/mfd/stm32-timers.h
@@ -124,8 +124,20 @@ struct stm32_timers {
struct stm32_timers_dma dma; /* Only to be used by the parent */
};

+#if IS_REACHABLE(CONFIG_MFD_STM32_TIMERS)
int stm32_timers_dma_burst_read(struct device *dev, u32 *buf,
enum stm32_timers_dmas id, u32 reg,
unsigned int num_reg, unsigned int bursts,
unsigned long tmo_ms);
+#else
+static inline int stm32_timers_dma_burst_read(struct device *dev, u32 *buf,
+ enum stm32_timers_dmas id,
+ u32 reg,
+ unsigned int num_reg,
+ unsigned int bursts,
+ unsigned long tmo_ms)
+{
+ return -ENODEV;
+}
+#endif
#endif
--
1.9.1
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