linux-kernel - [PATCH 1/2] regulator: vexpress: Get rid of struct vexpress

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Date:   Mon, 29 Apr 2019 19:35:41 +0800
From:   Axel Lin <axel.lin@...ics.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Pawel Moll <pawel.moll@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org, Axel Lin <axel.lin@...ics.com>
Subject: [PATCH 1/2] regulator: vexpress: Get rid of struct vexpress_regulator

The *regdev and *regmap can be replaced by local variables in probe().
Only desc of struct vexpress_regulator is really need, so just use
struct regulator_desc directly and remove struct vexpress_regulator.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/vexpress-regulator.c | 53 +++++++++++---------------
 1 file changed, 22 insertions(+), 31 deletions(-)

diff --git a/drivers/regulator/vexpress-regulator.c b/drivers/regulator/vexpress-regulator.c
index ca4230fe9e77..a15a1319436a 100644
--- a/drivers/regulator/vexpress-regulator.c
+++ b/drivers/regulator/vexpress-regulator.c
@@ -23,17 +23,10 @@
 #include <linux/regulator/of_regulator.h>
 #include <linux/vexpress.h>
 
-struct vexpress_regulator {
-	struct regulator_desc desc;
-	struct regulator_dev *regdev;
-	struct regmap *regmap;
-};
-
 static int vexpress_regulator_get_voltage(struct regulator_dev *regdev)
 {
-	struct vexpress_regulator *reg = rdev_get_drvdata(regdev);
-	u32 uV;
-	int err = regmap_read(reg->regmap, 0, &uV);
+	unsigned int uV;
+	int err = regmap_read(regdev->regmap, 0, &uV);
 
 	return err ? err : uV;
 }
@@ -41,9 +34,7 @@ static int vexpress_regulator_get_voltage(struct regulator_dev *regdev)
 static int vexpress_regulator_set_voltage(struct regulator_dev *regdev,
 		int min_uV, int max_uV, unsigned *selector)
 {
-	struct vexpress_regulator *reg = rdev_get_drvdata(regdev);
-
-	return regmap_write(reg->regmap, 0, min_uV);
+	return regmap_write(regdev->regmap, 0, min_uV);
 }
 
 static const struct regulator_ops vexpress_regulator_ops_ro = {
@@ -57,44 +48,44 @@ static const struct regulator_ops vexpress_regulator_ops = {
 
 static int vexpress_regulator_probe(struct platform_device *pdev)
 {
-	struct vexpress_regulator *reg;
+	struct regulator_desc *desc;
 	struct regulator_init_data *init_data;
 	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+	struct regmap *regmap;
 
-	reg = devm_kzalloc(&pdev->dev, sizeof(*reg), GFP_KERNEL);
-	if (!reg)
+	desc = devm_kzalloc(&pdev->dev, sizeof(*desc), GFP_KERNEL);
+	if (!desc)
 		return -ENOMEM;
 
-	reg->regmap = devm_regmap_init_vexpress_config(&pdev->dev);
-	if (IS_ERR(reg->regmap))
-		return PTR_ERR(reg->regmap);
+	regmap = devm_regmap_init_vexpress_config(&pdev->dev);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
 
-	reg->desc.name = dev_name(&pdev->dev);
-	reg->desc.type = REGULATOR_VOLTAGE;
-	reg->desc.owner = THIS_MODULE;
-	reg->desc.continuous_voltage_range = true;
+	desc->name = dev_name(&pdev->dev);
+	desc->type = REGULATOR_VOLTAGE;
+	desc->owner = THIS_MODULE;
+	desc->continuous_voltage_range = true;
 
 	init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
-					       &reg->desc);
+					       desc);
 	if (!init_data)
 		return -EINVAL;
 
 	init_data->constraints.apply_uV = 0;
 	if (init_data->constraints.min_uV && init_data->constraints.max_uV)
-		reg->desc.ops = &vexpress_regulator_ops;
+		desc->ops = &vexpress_regulator_ops;
 	else
-		reg->desc.ops = &vexpress_regulator_ops_ro;
+		desc->ops = &vexpress_regulator_ops_ro;
 
+	config.regmap = regmap;
 	config.dev = &pdev->dev;
 	config.init_data = init_data;
-	config.driver_data = reg;
 	config.of_node = pdev->dev.of_node;
 
-	reg->regdev = devm_regulator_register(&pdev->dev, &reg->desc, &config);
-	if (IS_ERR(reg->regdev))
-		return PTR_ERR(reg->regdev);
-
-	platform_set_drvdata(pdev, reg);
+	rdev = devm_regulator_register(&pdev->dev, desc, &config);
+	if (IS_ERR(rdev))
+		return PTR_ERR(rdev);
 
 	return 0;
 }
-- 
2.20.1