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: Alexandru Gagniuc <mr.nuke...@gmail.com>
---
Changes since v1/and v2:
* Separated this from main patch to better show diff
drivers/gpu/drm/bridge/sii902x.c | 77 ++++++++++++++++++--------------
1 file changed, 43 insertions(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 33fd33f953ec..f78c17f49887 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -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)
{
--
2.26.2
