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