1 files changed, 7 insertions, 17 deletions

diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 511a57dc7015..01b95eaae75a 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -48,12 +48,6 @@
 #include "pm.h"
 #include "sdrc.h"
 
-#define SDRC_POWER_AUTOCOUNT_SHIFT 8
-#define SDRC_POWER_AUTOCOUNT_MASK (0xffff << SDRC_POWER_AUTOCOUNT_SHIFT)
-#define SDRC_POWER_CLKCTRL_SHIFT 4
-#define SDRC_POWER_CLKCTRL_MASK (0x3 << SDRC_POWER_CLKCTRL_SHIFT)
-#define SDRC_SELF_REFRESH_ON_AUTOCOUNT (0x2 << SDRC_POWER_CLKCTRL_SHIFT)
-
 /* Scratchpad offsets */
 #define OMAP343X_TABLE_ADDRESS_OFFSET      0x31
 #define OMAP343X_TABLE_VALUE_OFFSET        0x30
@@ -402,19 +396,15 @@ static void omap_sram_idle(void)
         }
 
         /*
-         * Force SDRAM controller to self-refresh mode after timeout on
-         * autocount. This is needed on ES3.0 to avoid SDRAM controller
-         * hang-ups.
-         */
+        * On EMU/HS devices ROM code restores a SRDC value
+        * from scratchpad which has automatic self refresh on timeout
+        * of AUTO_CNT = 1 enabled. This takes care of errata 1.142.
+        * Hence store/restore the SDRC_POWER register here.
+        */
         if (omap_rev() >= OMAP3430_REV_ES3_0 &&
             omap_type() != OMAP2_DEVICE_TYPE_GP &&
-            core_next_state == PWRDM_POWER_OFF) {
+            core_next_state == PWRDM_POWER_OFF)
                 sdrc_pwr = sdrc_read_reg(SDRC_POWER);
-                sdrc_write_reg((sdrc_pwr &
-                        ~(SDRC_POWER_AUTOCOUNT_MASK|SDRC_POWER_CLKCTRL_MASK)) |
-                        (1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
-                        SDRC_SELF_REFRESH_ON_AUTOCOUNT, SDRC_POWER);
-        }
 
         /*
          * omap3_arm_context is the location where ARM registers
@@ -424,7 +414,7 @@ static void omap_sram_idle(void)
         _omap_sram_idle(omap3_arm_context, save_state);
         cpu_init();
 
-        /* Restore normal SDRAM settings */
+        /* Restore normal SDRC POWER settings */
         if (omap_rev() >= OMAP3430_REV_ES3_0 &&
             omap_type() != OMAP2_DEVICE_TYPE_GP &&
             core_next_state == PWRDM_POWER_OFF)