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Input: samsung-keypad - switch to using managed resources 

devm_* functions are device managed and make error handling and code
simpler. While at it also fix error exit paths.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Sachin Kamat 2012-11-27 22:34:38 -08:00 committed by Dmitry Torokhov
parent 9336648978
commit a57da34795
1 changed files with 31 additions and 72 deletions
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103
drivers/input/keyboard/samsung-keypad.c
View File

@ -309,7 +309,7 @@ static void samsung_keypad_parse_dt_gpio(struct device *dev,
struct samsung_keypad *keypad)
{
struct device_node *np = dev->of_node;
int gpio, ret, row, col;
int gpio, error, row, col;
for (row = 0; row < keypad->rows; row++) {
gpio = of_get_named_gpio(np, "row-gpios", row);
@ -320,10 +320,11 @@ static void samsung_keypad_parse_dt_gpio(struct device *dev,
continue;
}
ret = gpio_request(gpio, "keypad-row");
if (ret)
dev_err(dev, "keypad row[%d] gpio request failed\n",
row);
error = devm_gpio_request(dev, gpio, "keypad-row");
if (error)
dev_err(dev,
"keypad row[%d] gpio request failed: %d\n",
row, error);
}
for (col = 0; col < keypad->cols; col++) {
@ -335,35 +336,19 @@ static void samsung_keypad_parse_dt_gpio(struct device *dev,
continue;
}
ret = gpio_request(gpio, "keypad-col");
if (ret)
dev_err(dev, "keypad column[%d] gpio request failed\n",
col);
error = devm_gpio_request(dev, gpio, "keypad-col");
if (error)
dev_err(dev,
"keypad column[%d] gpio request failed: %d\n",
col, error);
}
}
static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
{
int cnt;
for (cnt = 0; cnt < keypad->rows; cnt++)
if (gpio_is_valid(keypad->row_gpios[cnt]))
gpio_free(keypad->row_gpios[cnt]);
for (cnt = 0; cnt < keypad->cols; cnt++)
if (gpio_is_valid(keypad->col_gpios[cnt]))
gpio_free(keypad->col_gpios[cnt]);
}
#else
static
struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev)
{
return NULL;
}
static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
{
}
#endif
static int samsung_keypad_probe(struct platform_device *pdev)
@ -405,36 +390,30 @@ static int samsung_keypad_probe(struct platform_device *pdev)
row_shift = get_count_order(pdata->cols);
keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]);
keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL);
input_dev = input_allocate_device();
if (!keypad || !input_dev) {
error = -ENOMEM;
goto err_free_mem;
}
keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad) + keymap_size,
GFP_KERNEL);
input_dev = devm_input_allocate_device(&pdev->dev);
if (!keypad || !input_dev)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
error = -ENODEV;
goto err_free_mem;
}
if (!res)
return -ENODEV;
keypad->base = ioremap(res->start, resource_size(res));
if (!keypad->base) {
error = -EBUSY;
goto err_free_mem;
}
keypad->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
if (!keypad->base)
return -EBUSY;
keypad->clk = clk_get(&pdev->dev, "keypad");
keypad->clk = devm_clk_get(&pdev->dev, "keypad");
if (IS_ERR(keypad->clk)) {
dev_err(&pdev->dev, "failed to get keypad clk\n");
error = PTR_ERR(keypad->clk);
goto err_unmap_base;
return PTR_ERR(keypad->clk);
}
error = clk_prepare(keypad->clk);
if (error) {
dev_err(&pdev->dev, "keypad clock prepare failed\n");
goto err_put_clk;
return error;
}
keypad->input_dev = input_dev;
@ -479,14 +458,15 @@ static int samsung_keypad_probe(struct platform_device *pdev)
keypad->irq = platform_get_irq(pdev, 0);
if (keypad->irq < 0) {
error = keypad->irq;
goto err_put_clk;
goto err_unprepare_clk;
}
error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq,
IRQF_ONESHOT, dev_name(&pdev->dev), keypad);
error = devm_request_threaded_irq(&pdev->dev, keypad->irq, NULL,
samsung_keypad_irq, IRQF_ONESHOT,
dev_name(&pdev->dev), keypad);
if (error) {
dev_err(&pdev->dev, "failed to register keypad interrupt\n");
goto err_put_clk;
goto err_unprepare_clk;
}
device_init_wakeup(&pdev->dev, pdata->wakeup);
@ -495,7 +475,7 @@ static int samsung_keypad_probe(struct platform_device *pdev)
error = input_register_device(keypad->input_dev);
if (error)
goto err_free_irq;
goto err_disable_runtime_pm;
if (pdev->dev.of_node) {
devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap);
@ -504,22 +484,12 @@ static int samsung_keypad_probe(struct platform_device *pdev)
}
return 0;
err_free_irq:
free_irq(keypad->irq, keypad);
err_disable_runtime_pm:
pm_runtime_disable(&pdev->dev);
device_init_wakeup(&pdev->dev, 0);
platform_set_drvdata(pdev, NULL);
err_unprepare_clk:
clk_unprepare(keypad->clk);
err_put_clk:
clk_put(keypad->clk);
samsung_keypad_dt_gpio_free(keypad);
err_unmap_base:
iounmap(keypad->base);
err_free_mem:
input_free_device(input_dev);
kfree(keypad);
return error;
}
@ -533,18 +503,7 @@ static int samsung_keypad_remove(struct platform_device *pdev)
input_unregister_device(keypad->input_dev);
/*
* It is safe to free IRQ after unregistering device because
* samsung_keypad_close will shut off interrupts.
*/
free_irq(keypad->irq, keypad);
clk_unprepare(keypad->clk);
clk_put(keypad->clk);
samsung_keypad_dt_gpio_free(keypad);
iounmap(keypad->base);
kfree(keypad);
return 0;
}