From 28047eced817b3b7cd404fac4b26f29fcf04f1f7 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Thu, 4 Oct 2007 23:16:42 +0100 Subject: [PATCH] [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 Signed-off-by: Russell King --- arch/arm/mach-s3c2440/mach-osiris.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/mach-s3c2440/mach-osiris.c b/arch/arm/mach-s3c2440/mach-osiris.c index 0ba7e9060c..be5377f128 100644 --- 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; } -- 2.39.5