pxa: start.S: enable SRAM clock

SRAM is used for early stack, but kernel disables its clock on suspend.
Re-enable SRAM clock on startup, otherwise u-boot crashes on resume from suspend.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>

diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index 24b6ad1..ce1181a 100644 (file)
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -53,7 +53,15 @@ reset:
 #ifdef CONFIG_CPU_PXA25X
        bl      lock_cache_for_stack
 #endif
-
+#ifdef CONFIG_CPU_PXA27X
+       /*
+        * enable clock for SRAM
+        */
+       ldr     r0,=CKEN
+       ldr     r1,[r0]
+       orr     r1,r1,#(1 << 20)
+       str     r1,[r0]
+#endif
        bl      _main
 
 /*------------------------------------------------------------------------------*/