From: William Breathitt Gray vilhelm.gray@gmail.com
[ Upstream commit ea434ff82649111de4fcabd76187270f8abdb63a ]
The STM32 timer permits configuration of the counter encoder mode via the slave mode control register (SMCR) slave mode selection (SMS) bits. This patch provides preprocessor defines for the supported encoder modes.
Cc: Fabrice Gasnier fabrice.gasnier@foss.st.com Signed-off-by: William Breathitt Gray vilhelm.gray@gmail.com Reviewed-by: Fabrice Gasnier fabrice.gasnier@foss.st.com Link: https://lore.kernel.org/r/ad3d9cd7af580d586316d368f74964cbc394f981.163003120... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Stable-dep-of: 00f4bc5184c1 ("counter: 104-quad-8: Fix Synapse action reported for Index signals") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/counter/stm32-timer-cnt.c | 16 ++++++++-------- include/linux/mfd/stm32-timers.h | 4 ++++ 2 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index 3fb0debd7425d..1fbc46f4ee66e 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -93,16 +93,16 @@ static int stm32_count_function_get(struct counter_device *counter, regmap_read(priv->regmap, TIM_SMCR, &smcr);
switch (smcr & TIM_SMCR_SMS) { - case 0: + case TIM_SMCR_SMS_SLAVE_MODE_DISABLED: *function = STM32_COUNT_SLAVE_MODE_DISABLED; return 0; - case 1: + case TIM_SMCR_SMS_ENCODER_MODE_1: *function = STM32_COUNT_ENCODER_MODE_1; return 0; - case 2: + case TIM_SMCR_SMS_ENCODER_MODE_2: *function = STM32_COUNT_ENCODER_MODE_2; return 0; - case 3: + case TIM_SMCR_SMS_ENCODER_MODE_3: *function = STM32_COUNT_ENCODER_MODE_3; return 0; default: @@ -119,16 +119,16 @@ static int stm32_count_function_set(struct counter_device *counter,
switch (function) { case STM32_COUNT_SLAVE_MODE_DISABLED: - sms = 0; + sms = TIM_SMCR_SMS_SLAVE_MODE_DISABLED; break; case STM32_COUNT_ENCODER_MODE_1: - sms = 1; + sms = TIM_SMCR_SMS_ENCODER_MODE_1; break; case STM32_COUNT_ENCODER_MODE_2: - sms = 2; + sms = TIM_SMCR_SMS_ENCODER_MODE_2; break; case STM32_COUNT_ENCODER_MODE_3: - sms = 3; + sms = TIM_SMCR_SMS_ENCODER_MODE_3; break; default: return -EINVAL; diff --git a/include/linux/mfd/stm32-timers.h b/include/linux/mfd/stm32-timers.h index f8db83aedb2b5..5f5c43fd69ddd 100644 --- a/include/linux/mfd/stm32-timers.h +++ b/include/linux/mfd/stm32-timers.h @@ -82,6 +82,10 @@ #define MAX_TIM_ICPSC 0x3 #define TIM_CR2_MMS_SHIFT 4 #define TIM_CR2_MMS2_SHIFT 20 +#define TIM_SMCR_SMS_SLAVE_MODE_DISABLED 0 /* counts on internal clock when CEN=1 */ +#define TIM_SMCR_SMS_ENCODER_MODE_1 1 /* counts TI1FP1 edges, depending on TI2FP2 level */ +#define TIM_SMCR_SMS_ENCODER_MODE_2 2 /* counts TI2FP2 edges, depending on TI1FP1 level */ +#define TIM_SMCR_SMS_ENCODER_MODE_3 3 /* counts on both TI1FP1 and TI2FP2 edges */ #define TIM_SMCR_TS_SHIFT 4 #define TIM_BDTR_BKF_MASK 0xF #define TIM_BDTR_BKF_SHIFT(x) (16 + (x) * 4)