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Subject[PATCH 4/5 v9] regulator: gpio: Simplify probe path
Date
Use devm_* managed device resources and create a local
struct device *dev variable to simplify the code inside
probe().

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v8->v9:
- Rebased on other changes.
- Collected Marek's Tested-by.
ChangeLog v7->v8:
- Rebase on v5.0-rc1.
ChangeLog v6->v7:
- Resend with the rest.
ChangeLog v3->v6:
- Rebase on top of the other changes.
- Change numbering to fit the rest of the series.
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
---
drivers/regulator/gpio-regulator.c | 54 ++++++++++++------------------
1 file changed, 22 insertions(+), 32 deletions(-)

diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index 43735704bb87..d1a9f71087da 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -228,28 +228,29 @@ static struct regulator_ops gpio_regulator_current_ops = {

static int gpio_regulator_probe(struct platform_device *pdev)
{
- struct gpio_regulator_config *config = dev_get_platdata(&pdev->dev);
- struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct gpio_regulator_config *config = dev_get_platdata(dev);
+ struct device_node *np = dev->of_node;
struct gpio_regulator_data *drvdata;
struct regulator_config cfg = { };
enum gpiod_flags gflags;
int ptr, ret, state, i;

- drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
+ drvdata = devm_kzalloc(dev, sizeof(struct gpio_regulator_data),
GFP_KERNEL);
if (drvdata == NULL)
return -ENOMEM;

if (np) {
- config = of_get_gpio_regulator_config(&pdev->dev, np,
+ config = of_get_gpio_regulator_config(dev, np,
&drvdata->desc);
if (IS_ERR(config))
return PTR_ERR(config);
}

- drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
+ drvdata->desc.name = devm_kstrdup(dev, config->supply_name, GFP_KERNEL);
if (drvdata->desc.name == NULL) {
- dev_err(&pdev->dev, "Failed to allocate supply name\n");
+ dev_err(dev, "Failed to allocate supply name\n");
return -ENOMEM;
}

@@ -269,14 +270,14 @@ static int gpio_regulator_probe(struct platform_device *pdev)
}
drvdata->nr_gpios = config->ngpios;

- drvdata->states = kmemdup(config->states,
- config->nr_states *
- sizeof(struct gpio_regulator_state),
- GFP_KERNEL);
+ drvdata->states = devm_kmemdup(dev,
+ config->states,
+ config->nr_states *
+ sizeof(struct gpio_regulator_state),
+ GFP_KERNEL);
if (drvdata->states == NULL) {
- dev_err(&pdev->dev, "Failed to allocate state data\n");
- ret = -ENOMEM;
- goto err_name;
+ dev_err(dev, "Failed to allocate state data\n");
+ return -ENOMEM;
}
drvdata->nr_states = config->nr_states;

@@ -295,9 +296,8 @@ static int gpio_regulator_probe(struct platform_device *pdev)
drvdata->desc.ops = &gpio_regulator_current_ops;
break;
default:
- dev_err(&pdev->dev, "No regulator type set\n");
- ret = -EINVAL;
- goto err_memstate;
+ dev_err(dev, "No regulator type set\n");
+ return -EINVAL;
}

/* build initial state from gpio init data. */
@@ -308,7 +308,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
}
drvdata->state = state;

- cfg.dev = &pdev->dev;
+ cfg.dev = dev;
cfg.init_data = config->init_data;
cfg.driver_data = drvdata;
cfg.of_node = np;
@@ -322,28 +322,20 @@ static int gpio_regulator_probe(struct platform_device *pdev)
else
gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE;

- cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, "enable", gflags);
- if (IS_ERR(cfg.ena_gpiod)) {
- ret = PTR_ERR(cfg.ena_gpiod);
- goto err_memstate;
- }
+ cfg.ena_gpiod = gpiod_get_optional(dev, "enable", gflags);
+ if (IS_ERR(cfg.ena_gpiod))
+ return PTR_ERR(cfg.ena_gpiod);

drvdata->dev = regulator_register(&drvdata->desc, &cfg);
if (IS_ERR(drvdata->dev)) {
ret = PTR_ERR(drvdata->dev);
- dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
- goto err_memstate;
+ dev_err(dev, "Failed to register regulator: %d\n", ret);
+ return ret;
}

platform_set_drvdata(pdev, drvdata);

return 0;
-
-err_memstate:
- kfree(drvdata->states);
-err_name:
- kfree(drvdata->desc.name);
- return ret;
}

static int gpio_regulator_remove(struct platform_device *pdev)
@@ -351,8 +343,6 @@ static int gpio_regulator_remove(struct platform_device *pdev)
struct gpio_regulator_data *drvdata = platform_get_drvdata(pdev);

regulator_unregister(drvdata->dev);
- kfree(drvdata->states);
- kfree(drvdata->desc.name);

return 0;
}
--
2.20.1
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