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

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

[Milo Kim]

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

[PATCH 2/2] regulator:lp872x: handle error case

[Milo Kim]

If memory allocation gets failed on parsing the DT, then it returns error
'-ENOMEM' explicitly. Then, the driver exists from the _probe().

Cc: linux-kernel@vger.kernel.org
Signed-off-by: Milo Kim <milo.kim@ti.com>
---
 drivers/regulator/lp872x.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/lp872x.c b/drivers/regulator/lp872x.c
index 9142c1a..8702e73 100644
--- a/drivers/regulator/lp872x.c
+++ b/drivers/regulator/lp872x.c
@@ -849,7 +849,7 @@ static struct lp872x_platform_data
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
-		goto out;
+		return ERR_PTR(-ENOMEM);
 
 	of_property_read_u8(np, "ti,general-config", &pdata->general_config);
 	if (of_find_property(np, "ti,update-config", NULL))
@@ -857,7 +857,7 @@ static struct lp872x_platform_data
 
 	pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL);
 	if (!pdata->dvs)
-		goto out;
+		return ERR_PTR(-ENOMEM);
 
 	pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0);
 	of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel);
@@ -910,11 +910,14 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 		[LP8725] = LP8725_NUM_REGULATORS,
 	};
 
-	if (cl->dev.of_node)
+	if (cl->dev.of_node) {
 		pdata = lp872x_populate_pdata_from_dt(&cl->dev,
 					      (enum lp872x_id)id->driver_data);
-	else
+		if (IS_ERR(pdata))
+			return PTR_ERR(pdata);
+	} else {
 		pdata = dev_get_platdata(&cl->dev);
+	}
 
 	lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
 	if (!lp)
-- 
1.9.1

Applied "regulator: lp872x: handle error case" to the regulator tree

[Mark Brown]

The patch

   regulator: lp872x: handle error case

has been applied to the regulator tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 804486b19de92449203f95027c2b207d8c5d5c79 Mon Sep 17 00:00:00 2001
From: Milo Kim <milo.kim@ti.com>
Date: Tue, 25 Aug 2015 14:54:12 +0900
Subject: [PATCH] regulator: lp872x: handle error case

If memory allocation gets failed on parsing the DT, then it returns error
'-ENOMEM' explicitly. Then, the driver exists from the _probe().

Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/lp872x.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/lp872x.c b/drivers/regulator/lp872x.c
index 9142c1adc70c..8702e7384af7 100644
--- a/drivers/regulator/lp872x.c
+++ b/drivers/regulator/lp872x.c
@@ -849,7 +849,7 @@ static struct lp872x_platform_data
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
-		goto out;
+		return ERR_PTR(-ENOMEM);
 
 	of_property_read_u8(np, "ti,general-config", &pdata->general_config);
 	if (of_find_property(np, "ti,update-config", NULL))
@@ -857,7 +857,7 @@ static struct lp872x_platform_data
 
 	pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL);
 	if (!pdata->dvs)
-		goto out;
+		return ERR_PTR(-ENOMEM);
 
 	pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0);
 	of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel);
@@ -910,11 +910,14 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 		[LP8725] = LP8725_NUM_REGULATORS,
 	};
 
-	if (cl->dev.of_node)
+	if (cl->dev.of_node) {
 		pdata = lp872x_populate_pdata_from_dt(&cl->dev,
 					      (enum lp872x_id)id->driver_data);
-	else
+		if (IS_ERR(pdata))
+			return PTR_ERR(pdata);
+	} else {
 		pdata = dev_get_platdata(&cl->dev);
+	}
 
 	lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
 	if (!lp)
-- 
2.5.0

Applied "regulator: lp872x: use the private data instead of updating I2C device platform data" to the regulator tree

[Mark Brown]

The patch

   regulator: lp872x: use the private data instead of updating I2C device platform data

has been applied to the regulator tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d9ffae15f7b1933c71dfb7c5e8ef61296d2833d7 Mon Sep 17 00:00:00 2001
From: Milo Kim <milo.kim@ti.com>
Date: Tue, 25 Aug 2015 14:54:11 +0900
Subject: [PATCH] regulator: lp872x: use the private data instead of updating
 I2C device platform data

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.

Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 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 3de328ab41f3..9142c1adc70c 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);
 
-- 
2.5.0

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

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 271 bytes --]

On Tue, Aug 25, 2015 at 02:54:11PM +0900, Milo Kim wrote:
> Currently, lp872x driver parses the DT and copies values into the
> 'cl->dev.platform_data' if 'of_node' exists.

Please use the normal style for subject lines with a space between the
subsystem and the driver.

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