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 <marc...@chromium.org>
Signed-off-by: Sean Paul <seanp...@chromium.org>
---
drivers/video/backlight/lp855x_bl.c | 37 ++++++++++++++++++-------------------
1 file changed, 18 insertions(+), 19 deletions(-)
diff --git a/drivers/video/backlight/lp855x_bl.c
b/drivers/video/backlight/lp855x_bl.c
index 25fb8e3..257b3ba 100644
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -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->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;
+ 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;
+
i2c_set_clientdata(cl, lp);
ret = lp855x_configure(lp);
--
2.1.1
--
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