On some board it is possible that the sensor 'powerdown'
pin might be controlled with a gpio instead of being
tied to always powered.
This patch add support to specify an optional gpio
which will be set at probe time and remained on.
Signed-off-by: Benoit Parrot <bparrot@xxxxxx>
---
drivers/media/i2c/Kconfig | 2 +-
drivers/media/i2c/ov2659.c | 13 +++++++++++++
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 7eee1812bba3..315c1d8bdb7b 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -634,7 +634,7 @@ config VIDEO_OV2640
config VIDEO_OV2659
tristate "OmniVision OV2659 sensor support"
depends on VIDEO_V4L2 && I2C
- depends on MEDIA_CAMERA_SUPPORT
+ depends on MEDIA_CAMERA_SUPPORT && GPIOLIB
select V4L2_FWNODE
help
This is a Video4Linux2 sensor driver for the OmniVision
diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c
index efbe6dc720e2..c64f73bef336 100644
--- a/drivers/media/i2c/ov2659.c
+++ b/drivers/media/i2c/ov2659.c
@@ -32,6 +32,8 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
+#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/videodev2.h>
@@ -232,6 +234,8 @@ struct ov2659 {
struct sensor_register *format_ctrl_regs;
struct ov2659_pll_ctrl pll;
int streaming;
+ /* used to control the sensor powerdownN pin */
+ struct gpio_desc *pwrdn_gpio;
};
static const struct sensor_register ov2659_init_regs[] = {
@@ -1391,6 +1395,7 @@ static int ov2659_probe(struct i2c_client *client)
struct v4l2_subdev *sd;
struct ov2659 *ov2659;
struct clk *clk;
+ struct gpio_desc *gpio;
int ret;
if (!pdata) {
@@ -1414,6 +1419,14 @@ static int ov2659_probe(struct i2c_client *client)
ov2659->xvclk_frequency > 27000000)
return -EINVAL;
+ /* Optional gpio don't fail if not present */
+ gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ ov2659->pwrdn_gpio = gpio;
+
v4l2_ctrl_handler_init(&ov2659->ctrls, 2);
ov2659->link_frequency =
v4l2_ctrl_new_std(&ov2659->ctrls, &ov2659_ctrl_ops,
--
2.17.1
