diff options
Diffstat (limited to 'drivers/counter/stm32-timer-cnt.c')
| -rw-r--r-- | drivers/counter/stm32-timer-cnt.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index 65b447b42e75..b969d550e90a 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -220,11 +220,40 @@ static int stm32_count_enable_write(struct counter_device *counter, return 0; } +static int stm32_count_prescaler_read(struct counter_device *counter, + struct counter_count *count, u64 *prescaler) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + u32 psc; + + regmap_read(priv->regmap, TIM_PSC, &psc); + + *prescaler = psc + 1; + + return 0; +} + +static int stm32_count_prescaler_write(struct counter_device *counter, + struct counter_count *count, u64 prescaler) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + u32 psc; + + if (!prescaler || prescaler > MAX_TIM_PSC + 1) + return -ERANGE; + + psc = prescaler - 1; + + return regmap_write(priv->regmap, TIM_PSC, psc); +} + static struct counter_comp stm32_count_ext[] = { COUNTER_COMP_DIRECTION(stm32_count_direction_read), COUNTER_COMP_ENABLE(stm32_count_enable_read, stm32_count_enable_write), COUNTER_COMP_CEILING(stm32_count_ceiling_read, stm32_count_ceiling_write), + COUNTER_COMP_COUNT_U64("prescaler", stm32_count_prescaler_read, + stm32_count_prescaler_write), }; static const enum counter_synapse_action stm32_clock_synapse_actions[] = { |