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path: root/drivers/mfd/stm32-timers.c
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Diffstat (limited to 'drivers/mfd/stm32-timers.c')
-rw-r--r--drivers/mfd/stm32-timers.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mfd/stm32-timers.c b/drivers/mfd/stm32-timers.c
index add603359124..44ed2fce0319 100644
--- a/drivers/mfd/stm32-timers.c
+++ b/drivers/mfd/stm32-timers.c
@@ -158,13 +158,18 @@ static const struct regmap_config stm32_timers_regmap_cfg = {
static void stm32_timers_get_arr_size(struct stm32_timers *ddata)
{
+ u32 arr;
+
+ /* Backup ARR to restore it after getting the maximum value */
+ regmap_read(ddata->regmap, TIM_ARR, &arr);
+
/*
* Only the available bits will be written so when readback
* we get the maximum value of auto reload register
*/
regmap_write(ddata->regmap, TIM_ARR, ~0L);
regmap_read(ddata->regmap, TIM_ARR, &ddata->max_arr);
- regmap_write(ddata->regmap, TIM_ARR, 0x0);
+ regmap_write(ddata->regmap, TIM_ARR, arr);
}
static int stm32_timers_dma_probe(struct device *dev,