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input: add suspend wakeup support to sh_keysc 

This patch adds wakeup support to the sh_keysc driver.
With this feature the ".../power/wakeup" file can be
used to enable and disable if the device takes the
system out of suspend. Default is enabled.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2009-03-10 06:24:21 +00:00 committed by Paul Mundt
parent 508407149a
commit a29b99ecce
1 changed files with 25 additions and 4 deletions
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29
drivers/input/keyboard/sh_keysc.c
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@ -219,6 +219,8 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev)
pdata->scan_timing, priv->iomem_base + KYCR1_OFFS);
iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
iowrite16(KYCR2_IRQ_LEVEL, priv->iomem_base + KYCR2_OFFS);
device_init_wakeup(&pdev->dev, 1);
return 0;
err5:
free_irq(irq, pdev);
@ -253,17 +255,36 @@ static int __devexit sh_keysc_remove(struct platform_device *pdev)
return 0;
}
static int sh_keysc_suspend(struct device *dev)
{
struct platform_device *pdev;
struct sh_keysc_priv *priv;
unsigned short value;
#define sh_keysc_suspend NULL
#define sh_keysc_resume NULL
pdev = container_of(dev, struct platform_device, dev);
priv = platform_get_drvdata(pdev);
value = ioread16(priv->iomem_base + KYCR1_OFFS);
if (device_may_wakeup(dev))
value |= 0x80;
else
value &= ~0x80;
iowrite16(value, priv->iomem_base + KYCR1_OFFS);
return 0;
}
static struct dev_pm_ops sh_keysc_dev_pm_ops = {
.suspend = sh_keysc_suspend,
};
struct platform_driver sh_keysc_device_driver = {
.probe = sh_keysc_probe,
.remove = __devexit_p(sh_keysc_remove),
.suspend = sh_keysc_suspend,
.resume = sh_keysc_resume,
.driver = {
.name = "sh_keysc",
.pm = &sh_keysc_dev_pm_ops,
}
};