The OV5670 has a powerdown and reset pin, named respectively "PWDN" and
"XSHUTDOWN".
Optionally probe the gpios connected to the pins during the driver probe
routine.
Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/media/i2c/ov5670.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/media/i2c/ov5670.c b/drivers/media/i2c/ov5670.c
index e71f13360480..0290f33f619d 100644
--- a/drivers/media/i2c/ov5670.c
+++ b/drivers/media/i2c/ov5670.c
@@ -3,6 +3,7 @@
#include <linux/acpi.h>
#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
@@ -1848,6 +1849,10 @@ struct ov5670 {
/* Regulators */
struct regulator_bulk_data supplies[OV5670_NUM_SUPPLIES];
+ /* Power-down and reset gpios. */
+ struct gpio_desc *pwdn_gpio; /* PWDNB pin. */
+ struct gpio_desc *reset_gpio; /* XSHUTDOWN pin. */
+
/* To serialize asynchronus callbacks */
struct mutex mutex;
@@ -2500,6 +2505,23 @@ static int ov5670_regulators_probe(struct ov5670 *ov5670)
ov5670->supplies);
}
+static int ov5670_gpio_probe(struct ov5670 *ov5670)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov5670->sd);
+
+ ov5670->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ov5670->pwdn_gpio))
+ return PTR_ERR(ov5670->pwdn_gpio);
+
+ ov5670->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ov5670->reset_gpio))
+ return PTR_ERR(ov5670->reset_gpio);
+
+ return 0;
+}
+
static int ov5670_probe(struct i2c_client *client)
{
struct ov5670 *ov5670;
@@ -2540,6 +2562,12 @@ static int ov5670_probe(struct i2c_client *client)
goto error_print;
}
+ ret = ov5670_gpio_probe(ov5670);
+ if (ret) {
+ err_msg = "GPIO probe failed";
+ goto error_print;
+ }
+
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
/* Check module identity */
--
2.39.0
