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platform/x86: Simplify intel_mid_powerbtn

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This patch:
1. Removes unnecessay #defines
2. Removes 'mfld_pb_priv' data structure which results in simpler error
   handling and less memory allocations.

Signed-off-by: Ameya Palande <2ameya@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Ameya Palande 2011-04-06 17:44:37 +03:00 committed by Matthew Garrett
parent 020036678e
commit b9e0669429
1 changed files with 30 additions and 42 deletions
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72
drivers/platform/x86/intel_mid_powerbtn.c
View file

@ -23,58 +23,48 @@
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <asm/intel_scu_ipc.h>
#define DRIVER_NAME "msic_power_btn"
#define MSIC_IRQ_STAT 0x02
#define MSIC_IRQ_PB (1 << 0)
#define MSIC_PB_CONFIG 0x3e
#define MSIC_PB_STATUS 0x3f
#define MSIC_PB_LEVEL (1 << 3) /* 1 - release, 0 - press */
struct mfld_pb_priv {
struct input_dev *input;
unsigned int irq;
};
#define MSIC_PB_LEVEL (1 << 3) /* 1 - release, 0 - press */
static irqreturn_t mfld_pb_isr(int irq, void *dev_id)
{
struct mfld_pb_priv *priv = dev_id;
struct input_dev *input = dev_id;
int ret;
u8 pbstat;
ret = intel_scu_ipc_ioread8(MSIC_PB_STATUS, &pbstat);
if (ret < 0)
return IRQ_HANDLED;
input_event(priv->input, EV_KEY, KEY_POWER, !(pbstat & MSIC_PB_LEVEL));
input_sync(priv->input);
if (ret < 0) {
dev_err(input->dev.parent, "Read error %d while reading"
" MSIC_PB_STATUS\n", ret);
} else {
input_event(input, EV_KEY, KEY_POWER,
!(pbstat & MSIC_PB_LEVEL));
input_sync(input);
}
return IRQ_HANDLED;
}
static int __devinit mfld_pb_probe(struct platform_device *pdev)
{
struct mfld_pb_priv *priv;
struct input_dev *input;
int irq;
int irq = platform_get_irq(pdev, 0);
int error;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -EINVAL;
priv = kzalloc(sizeof(struct mfld_pb_priv), GFP_KERNEL);
input = input_allocate_device();
if (!priv || !input) {
error = -ENOMEM;
goto err_free_mem;
if (!input) {
dev_err(&pdev->dev, "Input device allocation error\n");
return -ENOMEM;
}
priv->input = input;
priv->irq = irq;
input->name = pdev->name;
input->phys = "power-button/input0";
input->id.bustype = BUS_HOST;
@ -82,42 +72,40 @@ static int __devinit mfld_pb_probe(struct platform_device *pdev)
input_set_capability(input, EV_KEY, KEY_POWER);
error = request_threaded_irq(priv->irq, NULL, mfld_pb_isr,
0, DRIVER_NAME, priv);
error = request_threaded_irq(irq, NULL, mfld_pb_isr, 0,
DRIVER_NAME, input);
if (error) {
dev_err(&pdev->dev,
"unable to request irq %d for mfld power button\n",
irq);
goto err_free_mem;
dev_err(&pdev->dev, "Unable to request irq %d for mfld power"
"button\n", irq);
goto err_free_input;
}
error = input_register_device(input);
if (error) {
dev_err(&pdev->dev,
"unable to register input dev, error %d\n", error);
dev_err(&pdev->dev, "Unable to register input dev, error "
"%d\n", error);
goto err_free_irq;
}
platform_set_drvdata(pdev, priv);
platform_set_drvdata(pdev, input);
return 0;
err_free_irq:
free_irq(priv->irq, priv);
err_free_mem:
free_irq(irq, input);
err_free_input:
input_free_device(input);
kfree(priv);
return error;
}
static int __devexit mfld_pb_remove(struct platform_device *pdev)
{
struct mfld_pb_priv *priv = platform_get_drvdata(pdev);
free_irq(priv->irq, priv);
input_unregister_device(priv->input);
kfree(priv);
struct input_dev *input = platform_get_drvdata(pdev);
int irq = platform_get_irq(pdev, 0);
free_irq(irq, input);
input_unregister_device(input);
platform_set_drvdata(pdev, NULL);
return 0;
}