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Commit f77f50ca authored by Rodolfo Giometti's avatar Rodolfo Giometti Committed by Linus Torvalds
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[PATCH] au1100fb: add power management support 



Add power management support

[akpm@osdl.org: cleanup]
Signed-off-by: default avatarRodolfo Giometti <giometti@linux.it>
Signed-off-by: default avatarAntonino Daplas <adaplas@pol.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 137a8899

drivers/video/au1100fb.c

+39 −2
Original line number Diff line number Diff line
@@ -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",