counter: stm32-lptimer-cnt: Provide defines for clock polarities

The STM32 low-power timer permits configuration of the clock polarity
via the LPTIMX_CFGR register CKPOL bits. This patch provides
preprocessor defines for the supported clock polarities.

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/a111c8905c467805ca530728f88189b59430f27e.1630031207.git.vilhelm.gray@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c
index 1365695..7367f46 100644 (file)
--- a/drivers/counter/stm32-lptimer-cnt.c
+++ b/drivers/counter/stm32-lptimer-cnt.c
@@ -140,9 +140,9 @@ static const enum counter_function stm32_lptim_cnt_functions[] = {
 };
 
 enum stm32_lptim_synapse_action {
-       STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE,
-       STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE,
-       STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES,
+       STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE = STM32_LPTIM_CKPOL_RISING_EDGE,
+       STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE = STM32_LPTIM_CKPOL_FALLING_EDGE,
+       STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES = STM32_LPTIM_CKPOL_BOTH_EDGES,
        STM32_LPTIM_SYNAPSE_ACTION_NONE,
 };
 

diff --git a/include/linux/mfd/stm32-lptimer.h b/include/linux/mfd/stm32-lptimer.h
index 90b2055..06d3f11 100644 (file)
--- a/include/linux/mfd/stm32-lptimer.h
+++ b/include/linux/mfd/stm32-lptimer.h
@@ -45,6 +45,11 @@
 #define STM32_LPTIM_PRESC      GENMASK(11, 9)
 #define STM32_LPTIM_CKPOL      GENMASK(2, 1)
 
+/* STM32_LPTIM_CKPOL */
+#define STM32_LPTIM_CKPOL_RISING_EDGE  0
+#define STM32_LPTIM_CKPOL_FALLING_EDGE 1
+#define STM32_LPTIM_CKPOL_BOTH_EDGES   2
+
 /* STM32_LPTIM_ARR */
 #define STM32_LPTIM_MAX_ARR    0xFFFF