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-rw-r--r--drivers/media/i2c/adv7604.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 3ffb3231be3f..0b362eeb55c7 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -164,6 +164,7 @@ struct adv76xx_state {
struct adv76xx_platform_data pdata;
struct gpio_desc *hpd_gpio[4];
+ struct gpio_desc *reset_gpio;
struct v4l2_subdev sd;
struct media_pad pads[ADV76XX_PAD_MAX];
@@ -3018,6 +3019,19 @@ static int configure_regmaps(struct adv76xx_state *state)
return 0;
}
+static void adv76xx_reset(struct adv76xx_state *state)
+{
+ if (state->reset_gpio) {
+ /* ADV76XX can be reset by a low reset pulse of minimum 5 ms. */
+ gpiod_set_value_cansleep(state->reset_gpio, 0);
+ usleep_range(5000, 10000);
+ gpiod_set_value_cansleep(state->reset_gpio, 1);
+ /* It is recommended to wait 5 ms after the low pulse before */
+ /* an I2C write is performed to the ADV76XX. */
+ usleep_range(5000, 10000);
+ }
+}
+
static int adv76xx_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -3081,6 +3095,12 @@ static int adv76xx_probe(struct i2c_client *client,
if (state->hpd_gpio[i])
v4l_info(client, "Handling HPD %u GPIO\n", i);
}
+ state->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(state->reset_gpio))
+ return PTR_ERR(state->reset_gpio);
+
+ adv76xx_reset(state);
state->timings = cea640x480;
state->format = adv76xx_format_info(state, MEDIA_BUS_FMT_YUYV8_2X8);
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