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[ARM] 4597/2: OSIRIS: ensure CPLD0 is preserved after suspend

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Ensure that CPLD is restored to the original state
on resume, and that before going into suspend we
select the NAND bank we booted from for restarting.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ben Dooks 2007-10-04 23:16:42 +01:00 committed by Russell King
parent 804b3f9a16
commit 28047eced8
1 changed files with 12 additions and 0 deletions
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12
arch/arm/mach-s3c2440/mach-osiris.c
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@ -276,7 +276,17 @@ static unsigned char pm_osiris_ctrl0;
static int osiris_pm_suspend(struct sys_device *sd, pm_message_t state)
{
unsigned int tmp;
pm_osiris_ctrl0 = __raw_readb(OSIRIS_VA_CTRL0);
tmp = pm_osiris_ctrl0 & ~OSIRIS_CTRL0_NANDSEL;
/* ensure correct NAND slot is selected on resume */
if ((pm_osiris_ctrl0 & OSIRIS_CTRL0_BOOT_INT) == 0)
tmp |= 2;
__raw_writeb(tmp, OSIRIS_VA_CTRL0);
return 0;
}
@ -285,6 +295,8 @@ static int osiris_pm_resume(struct sys_device *sd)
if (pm_osiris_ctrl0 & OSIRIS_CTRL0_FIX8)
__raw_writeb(OSIRIS_CTRL1_FIX8, OSIRIS_VA_CTRL1);
__raw_writeb(pm_osiris_ctrl0, OSIRIS_VA_CTRL0);
return 0;
}