Commit abb7c7c2 authored by Frieder Schrempf's avatar Frieder Schrempf Committed by Mauro Carvalho Chehab
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media: adv7180: Add optional reset GPIO 



There is a reset input that can be controlled by GPIO. Let's add it
to let the driver control it if required.

[hverkuil: fix a small checkpatch alignment warning]

Signed-off-by: default avatarFrieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: default avatarFabio Estevam <festevam@gmail.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 724fae95

drivers/media/i2c/adv7180.c

+24 −0
Original line number Diff line number Diff line
@@ -205,6 +205,7 @@ struct adv7180_state { 
	struct mutex		mutex; /* mutual excl. when accessing chip */

	int			irq;

	struct gpio_desc	*pwdn_gpio;

	struct gpio_desc	*rst_gpio;

	v4l2_std_id		curr_norm;

	bool			powered;

	bool			streaming;
@@ -484,6 +485,19 @@ static void adv7180_set_power_pin(struct adv7180_state *state, bool on) 
	}

}



static void adv7180_set_reset_pin(struct adv7180_state *state, bool on)

{

	if (!state->rst_gpio)

		return;



	if (on) {

		gpiod_set_value_cansleep(state->rst_gpio, 1);

	} else {

		gpiod_set_value_cansleep(state->rst_gpio, 0);

		usleep_range(5000, 10000);

	}

}



static int adv7180_set_power(struct adv7180_state *state, bool on)

{

	u8 val;
@@ -1263,6 +1277,7 @@ static int init_device(struct adv7180_state *state) 
	mutex_lock(&state->mutex);



	adv7180_set_power_pin(state, true);

	adv7180_set_reset_pin(state, false);



	adv7180_write(state, ADV7180_REG_PWR_MAN, ADV7180_PWR_MAN_RES);

	usleep_range(5000, 10000);
@@ -1338,6 +1353,14 @@ static int adv7180_probe(struct i2c_client *client, 
		return ret;

	}



	state->rst_gpio = devm_gpiod_get_optional(&client->dev, "reset",

						  GPIOD_OUT_HIGH);

	if (IS_ERR(state->rst_gpio)) {

		ret = PTR_ERR(state->rst_gpio);

		v4l_err(client, "request for reset pin failed: %d\n", ret);

		return ret;

	}



	if (state->chip_info->flags & ADV7180_FLAG_MIPI_CSI2) {

		state->csi_client = i2c_new_dummy_device(client->adapter,

				ADV7180_DEFAULT_CSI_I2C_ADDR);
@@ -1428,6 +1451,7 @@ static int adv7180_remove(struct i2c_client *client) 
	i2c_unregister_device(state->vpp_client);

	i2c_unregister_device(state->csi_client);



	adv7180_set_reset_pin(state, true);

	adv7180_set_power_pin(state, false);



	mutex_destroy(&state->mutex);