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backlight: lp855x: Refactor DT parsing code 

This patch refactors the dt parsing code to avoid setting platform_data,
instead just setting lp->pdata directly. This facilitates easier
probe deferral since the current scheme would require us to clear out
dev->platform_data before deferring.

Cc: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Acked-by: Milo Kim <milo.kim@ti.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Sean Paul 2014-12-02 17:39:11 -08:00 committed by Lee Jones
parent edf387b6d1
commit 47726656dd
1 changed files with 18 additions and 19 deletions
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37
drivers/video/backlight/lp855x_bl.c
View File

@ -341,8 +341,10 @@ static const struct attribute_group lp855x_attr_group = {
};
#ifdef CONFIG_OF
static int lp855x_parse_dt(struct device *dev, struct device_node *node)
static int lp855x_parse_dt(struct lp855x *lp)
{
struct device *dev = lp->dev;
struct device_node *node = dev->of_node;
struct lp855x_platform_data *pdata;
int rom_length;
@ -381,12 +383,12 @@ static int lp855x_parse_dt(struct device *dev, struct device_node *node)
pdata->rom_data = &rom[0];
}
dev->platform_data = pdata;
lp->pdata = pdata;
return 0;
}
#else
static int lp855x_parse_dt(struct device *dev, struct device_node *node)
static int lp855x_parse_dt(struct lp855x *lp)
{
return -EINVAL;
}
@ -395,18 +397,8 @@ static int lp855x_parse_dt(struct device *dev, struct device_node *node)
static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
struct lp855x *lp;
struct lp855x_platform_data *pdata = dev_get_platdata(&cl->dev);
struct device_node *node = cl->dev.of_node;
int ret;
if (!pdata) {
ret = lp855x_parse_dt(&cl->dev, node);
if (ret < 0)
return ret;
pdata = dev_get_platdata(&cl->dev);
}
if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
return -EIO;
@ -414,16 +406,23 @@ static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
if (!lp)
return -ENOMEM;
if (pdata->period_ns > 0)
lp->client = cl;
lp->dev = &cl->dev;
lp->chipname = id->name;
lp->chip_id = id->driver_data;
lp->pdata = dev_get_platdata(&cl->dev);
if (!lp->pdata) {
ret = lp855x_parse_dt(lp);
if (ret < 0)
return ret;
}
if (lp->pdata->period_ns > 0)
lp->mode = PWM_BASED;
else
lp->mode = REGISTER_BASED;
lp->client = cl;
lp->dev = &cl->dev;
lp->pdata = pdata;
lp->chipname = id->name;
lp->chip_id = id->driver_data;
i2c_set_clientdata(cl, lp);
ret = lp855x_configure(lp);