staging: nvec: ps2: add suspend/resume functions

This adds suspend and resume functions to the nvec_ps2 mouse driver.

During suspend the nvec sends a "Cancel all mouse events" command. If
this is missed, there will be still some bytes in the received buffer
after resume which make the mouse go out of sync.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Julian Andres Klode <jak@jak-linux.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/nvec/nvec_ps2.c b/drivers/staging/nvec/nvec_ps2.c
index 742f5ccfe76387b75a89faea02773bc6022d600b..4410dfb3e33b47804d49852d537df94e3d6e3ae9 100644 (file)
--- a/drivers/staging/nvec/nvec_ps2.c
+++ b/drivers/staging/nvec/nvec_ps2.c
@@ -111,8 +111,27 @@ static int __devinit nvec_mouse_probe(struct platform_device *pdev)
        return 0;
 }
 
+static int nvec_mouse_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
+
+       /* send cancel autoreceive */
+       nvec_write_async(nvec, "\x06\x04", 2);
+
+       return 0;
+}
+
+static int nvec_mouse_resume(struct platform_device *pdev)
+{
+       ps2_startstreaming(ps2_dev.ser_dev);
+
+       return 0;
+}
+
 static struct platform_driver nvec_mouse_driver = {
        .probe  = nvec_mouse_probe,
+       .suspend = nvec_mouse_suspend,
+       .resume = nvec_mouse_resume,
        .driver = {
                .name = "nvec-mouse",
                .owner = THIS_MODULE,