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Input: ep93xx_keypad - switch to using managed resources

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By using managed resources (devm) we are able to streamline error handling
in probe and remove most of the custom remove method.

Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Link: https://lore.kernel.org/r/YWZGKWgdarGtvtYA@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2021-10-12 19:36:25 -07:00
parent ab31716967
commit c4be5e5a11
1 changed files with 37 additions and 81 deletions
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118
drivers/input/keyboard/ep93xx_keypad.c
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@ -219,6 +219,13 @@ static int __maybe_unused ep93xx_keypad_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(ep93xx_keypad_pm_ops,
ep93xx_keypad_suspend, ep93xx_keypad_resume);
static void ep93xx_keypad_release_gpio_action(void *_pdev)
{
struct platform_device *pdev = _pdev;
ep93xx_keypad_release_gpio(pdev);
}
static int ep93xx_keypad_probe(struct platform_device *pdev)
{
struct ep93xx_keypad *keypad;
@ -227,61 +234,46 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
struct resource *res;
int err;
keypad = kzalloc(sizeof(struct ep93xx_keypad), GFP_KERNEL);
keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
if (!keypad)
return -ENOMEM;
keypad->pdata = dev_get_platdata(&pdev->dev);
if (!keypad->pdata) {
err = -EINVAL;
goto failed_free;
}
if (!keypad->pdata)
return -EINVAL;
keymap_data = keypad->pdata->keymap_data;
if (!keymap_data) {
err = -EINVAL;
goto failed_free;
}
if (!keymap_data)
return -EINVAL;
keypad->irq = platform_get_irq(pdev, 0);
if (keypad->irq < 0) {
err = keypad->irq;
goto failed_free;
}
if (keypad->irq < 0)
return keypad->irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
err = -ENXIO;
goto failed_free;
}
if (!res)
return -ENXIO;
res = request_mem_region(res->start, resource_size(res), pdev->name);
if (!res) {
err = -EBUSY;
goto failed_free;
}
keypad->mmio_base = ioremap(res->start, resource_size(res));
if (keypad->mmio_base == NULL) {
err = -ENXIO;
goto failed_free_mem;
}
keypad->mmio_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(keypad->mmio_base))
return PTR_ERR(keypad->mmio_base);
err = ep93xx_keypad_acquire_gpio(pdev);
if (err)
goto failed_free_io;
return err;
keypad->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(keypad->clk)) {
err = PTR_ERR(keypad->clk);
goto failed_free_gpio;
}
err = devm_add_action_or_reset(&pdev->dev,
ep93xx_keypad_release_gpio_action, pdev);
if (err)
return err;
input_dev = input_allocate_device();
if (!input_dev) {
err = -ENOMEM;
goto failed_put_clk;
}
keypad->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(keypad->clk))
return PTR_ERR(keypad->clk);
input_dev = devm_input_allocate_device(&pdev->dev);
if (!input_dev)
return -ENOMEM;
keypad->input_dev = input_dev;
@ -289,26 +281,26 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
input_dev->id.bustype = BUS_HOST;
input_dev->open = ep93xx_keypad_open;
input_dev->close = ep93xx_keypad_close;
input_dev->dev.parent = &pdev->dev;
err = matrix_keypad_build_keymap(keymap_data, NULL,
EP93XX_MATRIX_ROWS, EP93XX_MATRIX_COLS,
keypad->keycodes, input_dev);
if (err)
goto failed_free_dev;
return err;
if (keypad->pdata->flags & EP93XX_KEYPAD_AUTOREPEAT)
__set_bit(EV_REP, input_dev->evbit);
input_set_drvdata(input_dev, keypad);
err = request_irq(keypad->irq, ep93xx_keypad_irq_handler,
0, pdev->name, keypad);
err = devm_request_irq(&pdev->dev, keypad->irq,
ep93xx_keypad_irq_handler,
0, pdev->name, keypad);
if (err)
goto failed_free_dev;
return err;
err = input_register_device(input_dev);
if (err)
goto failed_free_irq;
return err;
platform_set_drvdata(pdev, keypad);
@ -318,48 +310,12 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "failed to set up wakeup irq: %d\n", err);
return 0;
failed_free_irq:
free_irq(keypad->irq, keypad);
failed_free_dev:
input_free_device(input_dev);
failed_put_clk:
clk_put(keypad->clk);
failed_free_gpio:
ep93xx_keypad_release_gpio(pdev);
failed_free_io:
iounmap(keypad->mmio_base);
failed_free_mem:
release_mem_region(res->start, resource_size(res));
failed_free:
kfree(keypad);
return err;
}
static int ep93xx_keypad_remove(struct platform_device *pdev)
{
struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
struct resource *res;
dev_pm_clear_wake_irq(&pdev->dev);
free_irq(keypad->irq, keypad);
if (keypad->enabled)
clk_disable(keypad->clk);
clk_put(keypad->clk);
input_unregister_device(keypad->input_dev);
ep93xx_keypad_release_gpio(pdev);
iounmap(keypad->mmio_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
kfree(keypad);
return 0;
}