github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 07:03:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

media: ov2740: Add powerdown GPIO support

Browse Source 
The ov2740 sensor has both reset and power_down inputs according to
the datasheet one or the other should always be tied to DOVDD but on
some designs both are attached to GPIOs.

Add support for controlling both a reset and a powerdown GPIO.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Acked-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Hans de Goede 2024-11-28 16:23:37 +01:00 committed by Mauro Carvalho Chehab
parent 17898af922
commit fa3772f390
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/media/i2c/ov2740.c
View File

@ -525,6 +525,7 @@ struct ov2740 {
/* GPIOs, clocks */
struct gpio_desc *reset_gpio;
struct gpio_desc *powerdown_gpio;
struct clk *clk;
/* Current mode */
@ -1306,6 +1307,7 @@ static int ov2740_suspend(struct device *dev)
struct ov2740 *ov2740 = to_ov2740(sd);
gpiod_set_value_cansleep(ov2740->reset_gpio, 1);
gpiod_set_value_cansleep(ov2740->powerdown_gpio, 1);
clk_disable_unprepare(ov2740->clk);
return 0;
}
@ -1320,6 +1322,7 @@ static int ov2740_resume(struct device *dev)
if (ret)
return ret;
gpiod_set_value_cansleep(ov2740->powerdown_gpio, 0);
gpiod_set_value_cansleep(ov2740->reset_gpio, 0);
msleep(20);
@ -1348,9 +1351,17 @@ static int ov2740_probe(struct i2c_client *client)
if (IS_ERR(ov2740->reset_gpio)) {
return dev_err_probe(dev, PTR_ERR(ov2740->reset_gpio),
"failed to get reset GPIO\n");
} else if (ov2740->reset_gpio) {
}
ov2740->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH);
if (IS_ERR(ov2740->powerdown_gpio)) {
return dev_err_probe(dev, PTR_ERR(ov2740->powerdown_gpio),
"failed to get powerdown GPIO\n");
}
if (ov2740->reset_gpio || ov2740->powerdown_gpio) {
/*
* Ensure reset is asserted for at least 20 ms before
* Ensure reset/powerdown is asserted for at least 20 ms before
* ov2740_resume() deasserts it.
*/
msleep(20);