From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: Mon, 21 Mar 2016 01:37:06 +0000 (-0700)
Subject: pxa: start.S: enable SRAM clock
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9ddde3e6ce8abd97d397e3915204a6981d287e42;p=project%2Fbcm63xx%2Fu-boot.git

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 24b6ad187a..ce1181a6c5 100644
--- 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
 
 /*------------------------------------------------------------------------------*/