[PATCH 1/2] regulator:lp872x: use the private data instead of updating I2C device platform data

[Milo Kim <milo.kim@ti.com>]

Currently, lp872x driver parses the DT and copies values into the
'cl->dev.platform_data' if 'of_node' exists.
This may have architectural issue. Platform data is configurable through
the DT or I2C board info inside the platform area.
However, lp872x driver changes this configuration when it is loaded.

The lp872x driver should get data from the platform side and use the private
data, 'lp872x->pdata' instead of changing the original platform data.

Cc: linux-kernel@vger.kernel.org
Signed-off-by: Milo Kim <milo.kim@ti.com>
---
 drivers/regulator/lp872x.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/lp872x.c b/drivers/regulator/lp872x.c
index 3de328a..9142c1a 100644
--- a/drivers/regulator/lp872x.c
+++ b/drivers/regulator/lp872x.c
@@ -903,6 +903,7 @@ static struct lp872x_platform_data
 static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 {
 	struct lp872x *lp;
+	struct lp872x_platform_data *pdata;
 	int ret;
 	const int lp872x_num_regulators[] = {
 		[LP8720] = LP8720_NUM_REGULATORS,
@@ -910,8 +911,10 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 	};
 
 	if (cl->dev.of_node)
-		cl->dev.platform_data = lp872x_populate_pdata_from_dt(&cl->dev,
+		pdata = lp872x_populate_pdata_from_dt(&cl->dev,
 					      (enum lp872x_id)id->driver_data);
+	else
+		pdata = dev_get_platdata(&cl->dev);
 
 	lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
 	if (!lp)
@@ -927,7 +930,7 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 	}
 
 	lp->dev = &cl->dev;
-	lp->pdata = dev_get_platdata(&cl->dev);
+	lp->pdata = pdata;
 	lp->chipid = id->driver_data;
 	i2c_set_clientdata(cl, lp);
 
-- 
1.9.1