From d95c9760d9c8e046b09b54a3bb6dd0c9aa7a0eff Mon Sep 17 00:00:00 2001 From: Fabrice Gasnier Date: Fri, 18 May 2018 17:24:03 +0200 Subject: [PATCH] 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: 0c6609805b63 ("mfd: stm32-timers: Add support for DMAs") Signed-off-by: Fabrice Gasnier Reported-by: Randy Dunlap Tested-by: Randy Dunlap Signed-off-by: Lee Jones --- 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 -- 2.7.4