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path: root/drivers/video/au1100fb.c
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Diffstat (limited to 'drivers/video/au1100fb.c')
-rw-r--r--drivers/video/au1100fb.c41
1 files changed, 39 insertions, 2 deletions
diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c
index 789450bb0bc..d63c3f48585 100644
--- a/drivers/video/au1100fb.c
+++ b/drivers/video/au1100fb.c
@@ -7,6 +7,8 @@
* Karl Lessard <klessard@sunrisetelecom.com>
* <c.pellegrin@exadron.com>
*
+ * PM support added by Rodolfo Giometti <giometti@linux.it>
+ *
* Copyright 2002 MontaVista Software
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
@@ -602,17 +604,52 @@ int au1100fb_drv_remove(struct device *dev)
return 0;
}
+#ifdef CONFIG_PM
+static u32 sys_clksrc;
+static struct au1100fb_regs fbregs;
+
int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
{
- /* TODO */
+ struct au1100fb_device *fbdev = dev_get_drvdata(dev);
+
+ if (!fbdev)
+ return 0;
+
+ /* Save the clock source state */
+ sys_clksrc = au_readl(SYS_CLKSRC);
+
+ /* Blank the LCD */
+ au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
+
+ /* Stop LCD clocking */
+ au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
+
+ memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
+
return 0;
}
int au1100fb_drv_resume(struct device *dev)
{
- /* TODO */
+ struct au1100fb_device *fbdev = dev_get_drvdata(dev);
+
+ if (!fbdev)
+ return 0;
+
+ memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
+
+ /* Restart LCD clocking */
+ au_writel(sys_clksrc, SYS_CLKSRC);
+
+ /* Unblank the LCD */
+ au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
+
return 0;
}
+#else
+#define au1100fb_drv_suspend NULL
+#define au1100fb_drv_resume NULL
+#endif
static struct device_driver au1100fb_driver = {
.name = "au1100-lcd",