diff options
| author | Rodolfo Giometti <giometti@linux.it> | 2006-06-26 00:26:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 09:58:31 -0700 |
| commit | f77f50ca1a236ae213d1b9cef4ac042090c98ae6 (patch) | |
| tree | 25ab1fe586378c43b3a8d3e42a13f2cfeeb2c3e7 /drivers/video/au1100fb.c | |
| parent | 137a8899b1dba82b54463811844995a33b21ca39 (diff) | |
[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>
Diffstat (limited to 'drivers/video/au1100fb.c')
| -rw-r--r-- | drivers/video/au1100fb.c | 41 |
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", |