Commit 91b5e267 authored by Alexandru Gagniuc's avatar Alexandru Gagniuc Committed by Sam Ravnborg
Browse files

drm/bridge: sii902x: Refactor init code into separate function 



Separate the hardware initialization code from setting up the data
structures and parsing the device tree. The purpose of this change is
to provide a single exit point and avoid a waterfall of 'goto's in
the subsequent patch.

Signed-off-by: default avatarAlexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201020221501.260025-1-mr.nuke.me@gmail.com
parent f2e66f21

drivers/gpu/drm/bridge/sii902x.c

+43 −34
Original line number Diff line number Diff line
@@ -954,41 +954,13 @@ static const struct drm_bridge_timings default_sii902x_timings = { 
		 | DRM_BUS_FLAG_DE_HIGH,

};



static int sii902x_probe(struct i2c_client *client,

			 const struct i2c_device_id *id)

static int sii902x_init(struct sii902x *sii902x)

{

	struct device *dev = &client->dev;

	struct device *dev = &sii902x->i2c->dev;

	unsigned int status = 0;

	struct sii902x *sii902x;

	u8 chipid[4];

	int ret;



	ret = i2c_check_functionality(client->adapter,

				      I2C_FUNC_SMBUS_BYTE_DATA);

	if (!ret) {

		dev_err(dev, "I2C adapter not suitable\n");

		return -EIO;

	}



	sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);

	if (!sii902x)

		return -ENOMEM;



	sii902x->i2c = client;

	sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);

	if (IS_ERR(sii902x->regmap))

		return PTR_ERR(sii902x->regmap);



	sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",

						      GPIOD_OUT_LOW);

	if (IS_ERR(sii902x->reset_gpio)) {

		dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",

			PTR_ERR(sii902x->reset_gpio));

		return PTR_ERR(sii902x->reset_gpio);

	}



	mutex_init(&sii902x->mutex);



	sii902x_reset(sii902x);



	ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
@@ -1012,11 +984,11 @@ static int sii902x_probe(struct i2c_client *client, 
	regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);

	regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);



	if (client->irq > 0) {

	if (sii902x->i2c->irq > 0) {

		regmap_write(sii902x->regmap, SII902X_INT_ENABLE,

			     SII902X_HOTPLUG_EVENT);



		ret = devm_request_threaded_irq(dev, client->irq, NULL,

		ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL,

						sii902x_interrupt,

						IRQF_ONESHOT, dev_name(dev),

						sii902x);
@@ -1031,9 +1003,9 @@ static int sii902x_probe(struct i2c_client *client, 


	sii902x_audio_codec_init(sii902x, dev);



	i2c_set_clientdata(client, sii902x);

	i2c_set_clientdata(sii902x->i2c, sii902x);



	sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,

	sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev,

					1, 0, I2C_MUX_GATE,

					sii902x_i2c_bypass_select,

					sii902x_i2c_bypass_deselect);
@@ -1044,6 +1016,43 @@ static int sii902x_probe(struct i2c_client *client, 
	return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);

}



static int sii902x_probe(struct i2c_client *client,

			 const struct i2c_device_id *id)

{

	struct device *dev = &client->dev;

	struct sii902x *sii902x;

	int ret;



	ret = i2c_check_functionality(client->adapter,

				      I2C_FUNC_SMBUS_BYTE_DATA);

	if (!ret) {

		dev_err(dev, "I2C adapter not suitable\n");

		return -EIO;

	}



	sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);

	if (!sii902x)

		return -ENOMEM;



	sii902x->i2c = client;

	sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);

	if (IS_ERR(sii902x->regmap))

		return PTR_ERR(sii902x->regmap);



	sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",

						      GPIOD_OUT_LOW);

	if (IS_ERR(sii902x->reset_gpio)) {

		dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",

			PTR_ERR(sii902x->reset_gpio));

		return PTR_ERR(sii902x->reset_gpio);

	}



	mutex_init(&sii902x->mutex);



	ret = sii902x_init(sii902x);

	return ret;

}



static int sii902x_remove(struct i2c_client *client)



{

CRA Git | Maintained and supported by SUSTech CRA and CCSE