diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2022-11-30 00:11:44 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-12-06 08:10:07 +0100 |
| commit | 2fa8d1d76875fb976f963fdde50fc3e95d8d1025 (patch) | |
| tree | 81461f8d63238f4844e27aea951305c735f540ad /drivers/media | |
| parent | media: dvb-usb: m920x: make read-only arrays static const (diff) | |
| download | linux-2fa8d1d76875fb976f963fdde50fc3e95d8d1025.tar.xz linux-2fa8d1d76875fb976f963fdde50fc3e95d8d1025.zip | |
media: ov5693: Add support for a privacy-led GPIO
Add support for a privacy-led GPIO.
Making the privacy LED to controlable from userspace, as using the LED
class subsystem would do, would make it too easy for spy-ware to disable
the LED.
To avoid this have the sensor driver directly control the LED.
Link: https://lore.kernel.org/linux-media/20221129231149.697154-2-hdegoede@redhat.com
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/i2c/ov5693.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov5693.c b/drivers/media/i2c/ov5693.c index a97ec132ba3a..e3c3bed69ad6 100644 --- a/drivers/media/i2c/ov5693.c +++ b/drivers/media/i2c/ov5693.c @@ -156,6 +156,7 @@ struct ov5693_device { struct gpio_desc *reset; struct gpio_desc *powerdown; + struct gpio_desc *privacy_led; struct regulator_bulk_data supplies[OV5693_NUM_SUPPLIES]; struct clk *xvclk; @@ -789,6 +790,7 @@ static int ov5693_sensor_init(struct ov5693_device *ov5693) static void ov5693_sensor_powerdown(struct ov5693_device *ov5693) { + gpiod_set_value_cansleep(ov5693->privacy_led, 0); gpiod_set_value_cansleep(ov5693->reset, 1); gpiod_set_value_cansleep(ov5693->powerdown, 1); @@ -818,6 +820,7 @@ static int ov5693_sensor_powerup(struct ov5693_device *ov5693) gpiod_set_value_cansleep(ov5693->powerdown, 0); gpiod_set_value_cansleep(ov5693->reset, 0); + gpiod_set_value_cansleep(ov5693->privacy_led, 1); usleep_range(5000, 7500); @@ -1325,6 +1328,13 @@ static int ov5693_configure_gpios(struct ov5693_device *ov5693) return PTR_ERR(ov5693->powerdown); } + ov5693->privacy_led = devm_gpiod_get_optional(ov5693->dev, "privacy-led", + GPIOD_OUT_LOW); + if (IS_ERR(ov5693->privacy_led)) { + dev_err(ov5693->dev, "Error fetching privacy-led GPIO\n"); + return PTR_ERR(ov5693->privacy_led); + } + return 0; } |