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

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>

diff --git a/arch/arm/mach-s3c2440/mach-osiris.c b/arch/arm/mach-s3c2440/mach-osiris.c
index 0ba7e90..be5377f 100644 (file)
--- a/arch/arm/mach-s3c2440/mach-osiris.c
+++ b/arch/arm/mach-s3c2440/mach-osiris.c
@@ -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;
 }