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Input: max8925_onkey - switch to using managed resources 

Let's switch the driver to use managed resources, this will simplify
error handling and driver unbinding logic.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Himangi Saraogi 2014-05-29 00:21:56 -07:00 committed by Dmitry Torokhov
parent 5ac66de574
commit 04115e410c
1 changed files with 18 additions and 37 deletions
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55
drivers/input/misc/max8925_onkey.c
View File

@ -26,6 +26,7 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/mfd/max8925.h> #include <linux/mfd/max8925.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/device.h>
#define SW_INPUT (1 << 7) /* 0/1 -- up/down */ #define SW_INPUT (1 << 7) /* 0/1 -- up/down */
#define HARDRESET_EN (1 << 7) #define HARDRESET_EN (1 << 7)
@ -81,12 +82,14 @@ static int max8925_onkey_probe(struct platform_device *pdev)
return -EINVAL; return -EINVAL;
} }
info = kzalloc(sizeof(struct max8925_onkey_info), GFP_KERNEL); info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_onkey_info),
input = input_allocate_device(); GFP_KERNEL);
if (!info || !input) { if (!info)
error = -ENOMEM; return -ENOMEM;
goto err_free_mem;
} input = devm_input_allocate_device(&pdev->dev);
if (!input)
return -ENOMEM;
info->idev = input; info->idev = input;
info->i2c = chip->i2c; info->i2c = chip->i2c;
@ -100,54 +103,33 @@ static int max8925_onkey_probe(struct platform_device *pdev)
input->dev.parent = &pdev->dev; input->dev.parent = &pdev->dev;
input_set_capability(input, EV_KEY, KEY_POWER); input_set_capability(input, EV_KEY, KEY_POWER);
error = request_threaded_irq(irq[0], NULL, max8925_onkey_handler, error = devm_request_threaded_irq(&pdev->dev, irq[0], NULL,
IRQF_ONESHOT, "onkey-down", info); max8925_onkey_handler, IRQF_ONESHOT,
"onkey-down", info);
if (error < 0) { if (error < 0) {
dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
irq[0], error); irq[0], error);
goto err_free_mem; return error;
} }
error = request_threaded_irq(irq[1], NULL, max8925_onkey_handler, error = devm_request_threaded_irq(&pdev->dev, irq[1], NULL,
IRQF_ONESHOT, "onkey-up", info); max8925_onkey_handler, IRQF_ONESHOT,
"onkey-up", info);
if (error < 0) { if (error < 0) {
dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
irq[1], error); irq[1], error);
goto err_free_irq0; return error;
} }
error = input_register_device(info->idev); error = input_register_device(info->idev);
if (error) { if (error) {
dev_err(chip->dev, "Can't register input device: %d\n", error); dev_err(chip->dev, "Can't register input device: %d\n", error);
goto err_free_irq1; return error;
} }
platform_set_drvdata(pdev, info); platform_set_drvdata(pdev, info);
device_init_wakeup(&pdev->dev, 1); device_init_wakeup(&pdev->dev, 1);
return 0;
err_free_irq1:
free_irq(irq[1], info);
err_free_irq0:
free_irq(irq[0], info);
err_free_mem:
input_free_device(input);
kfree(info);
return error;
}
static int max8925_onkey_remove(struct platform_device *pdev)
{
struct max8925_onkey_info *info = platform_get_drvdata(pdev);
struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
free_irq(info->irq[0] + chip->irq_base, info);
free_irq(info->irq[1] + chip->irq_base, info);
input_unregister_device(info->idev);
kfree(info);
return 0; return 0;
} }
@ -190,7 +172,6 @@ static struct platform_driver max8925_onkey_driver = {
.pm = &max8925_onkey_pm_ops, .pm = &max8925_onkey_pm_ops,
}, },
.probe = max8925_onkey_probe, .probe = max8925_onkey_probe,
.remove = max8925_onkey_remove,
}; };
module_platform_driver(max8925_onkey_driver); module_platform_driver(max8925_onkey_driver);