diff mbox series

[v2,08/12] media: mt9m114: Put sensor in reset on power-down

Message ID 20250531163148.83497-9-hansg@kernel.org
State New
Headers show
Series media: mt9m114: Changes to make it work with atomisp devices | expand

Commit Message

Hans de Goede May 31, 2025, 4:31 p.m. UTC 
Put sensor back in reset on power-down.

Signed-off-by: Hans de Goede <hansg@kernel.org>
---
Changes in v2
- After setting reset high wait 20 clk cycles before disabling
  the clk and regulators
---
 drivers/media/i2c/mt9m114.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c
index fe30b9ff84ad..7a1451006cfe 100644
--- a/drivers/media/i2c/mt9m114.c
+++ b/drivers/media/i2c/mt9m114.c
@@ -2207,6 +2207,13 @@  static int mt9m114_power_on(struct mt9m114 *sensor)
 
 static void mt9m114_power_off(struct mt9m114 *sensor)
 {
+	unsigned int duration;
+
+	gpiod_set_value(sensor->reset, 1);
+	/* Power off takes 10 clock cycles. Double it to be safe. */
+	duration = DIV_ROUND_UP(2 * 10 * 1000000, sensor->clk_freq);
+	fsleep(duration);
+
 	clk_disable_unprepare(sensor->clk);
 	regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);
 }