From f77f50ca1a236ae213d1b9cef4ac042090c98ae6 Mon Sep 17 00:00:00 2001 From: Rodolfo Giometti Date: Mon, 26 Jun 2006 00:26:49 -0700 Subject: [PATCH] [PATCH] au1100fb: add power management support Add power management support [akpm@osdl.org: cleanup] Signed-off-by: Rodolfo Giometti Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/au1100fb.c | 41 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-) diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c index 789450bb0b..d63c3f4858 100644 --- a/drivers/video/au1100fb.c +++ b/drivers/video/au1100fb.c @@ -7,6 +7,8 @@ * Karl Lessard * * + * PM support added by Rodolfo Giometti + * * 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", -- 2.39.5