counter: stm32-timer-cnt: introduce channels

Simply add channels 3 and 4 that can be used for capture. Statically
add them, despite some timers doesn't have them. Rather rely on
stm32_action_read that will report "none" action for these currently.

Reviewed-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20240307133306.383045-8-fabrice.gasnier@foss.st.com
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>

diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c
index 17f87ace450d320981d22ff8d068b488248be421..f63d0c3e3f229b3aee08f3f17c717c2692992b97 100644 (file)
--- a/drivers/counter/stm32-timer-cnt.c
+++ b/drivers/counter/stm32-timer-cnt.c
@@ -25,6 +25,8 @@
 #define STM32_CH1_SIG          0
 #define STM32_CH2_SIG          1
 #define STM32_CLOCK_SIG                2
+#define STM32_CH3_SIG          3
+#define STM32_CH4_SIG          4
 
 struct stm32_timer_regs {
        u32 cr1;
@@ -365,6 +367,14 @@ static struct counter_signal stm32_signals[] = {
                .ext = stm32_count_clock_ext,
                .num_ext = ARRAY_SIZE(stm32_count_clock_ext),
        },
+       {
+               .id = STM32_CH3_SIG,
+               .name = "Channel 3"
+       },
+       {
+               .id = STM32_CH4_SIG,
+               .name = "Channel 4"
+       },
 };
 
 static struct counter_synapse stm32_count_synapses[] = {
@@ -383,6 +393,16 @@ static struct counter_synapse stm32_count_synapses[] = {
                .num_actions = ARRAY_SIZE(stm32_clock_synapse_actions),
                .signal = &stm32_signals[STM32_CLOCK_SIG]
        },
+       {
+               .actions_list = stm32_synapse_actions,
+               .num_actions = ARRAY_SIZE(stm32_synapse_actions),
+               .signal = &stm32_signals[STM32_CH3_SIG]
+       },
+       {
+               .actions_list = stm32_synapse_actions,
+               .num_actions = ARRAY_SIZE(stm32_synapse_actions),
+               .signal = &stm32_signals[STM32_CH4_SIG]
+       },
 };
 
 static struct counter_count stm32_counts = {