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mfd: stm32-timers: Fix pwm-stm32 linker issue with COMPILE_TEST 

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: 0c6609805b ("mfd: stm32-timers: Add support for DMAs")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>

Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Fabrice Gasnier 2018-05-18 17:24:03 +02:00 committed by Lee Jones
parent a3b51be3cd
commit d95c9760d9
1 changed files with 12 additions and 0 deletions
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12
include/linux/mfd/stm32-timers.h
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@ -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