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>

1 files changed, 25 insertions, 4 deletions

diff --git a/drivers/input/keyboard/sh_keysc.c b/drivers/input/keyboard/sh_keysc.c
index 5c8a1bcf7ca7..bf92178644ab 100644
--- a/drivers/input/keyboard/sh_keysc.c
+++ b/drivers/input/keyboard/sh_keysc.c
@@ -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;
+
+        pdev = container_of(dev, struct platform_device, dev);
+        priv = platform_get_drvdata(pdev);
+
+        value = ioread16(priv->iomem_base + KYCR1_OFFS);
 
-#define sh_keysc_suspend NULL
-#define sh_keysc_resume NULL
+        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,
         }
 };