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[PATCH] au1100fb: add power management support 

Add power management support

[akpm@osdl.org: cleanup]
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rodolfo Giometti 2006-06-26 00:26:49 -07:00 committed by Linus Torvalds
parent 137a8899b1
commit f77f50ca1a
1 changed files with 39 additions and 2 deletions
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41
drivers/video/au1100fb.c
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@ -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",