From cd1bd6ee94e720af911a2ce7db697af0df59c0a9 Mon Sep 17 00:00:00 2001
From: Peng Fan <Peng.Fan@freescale.com>
Date: Fri, 22 May 2015 13:09:58 +0800
Subject: MLK-10546-2 imx: mx7 implement reset_misc

On mx7d 12x12 lpddr3 arm2 board, POR_B reset in uboot will fail stress
reset test, and hangs in rom code. Rom log buffer show thats wrong
hab_image_entry and runs into serial download mode. Also there is no
time delay reset circuit for this board.

We found when disable CONFIG_VIDEO, all seems fine. Actually,
only the following piece of code can make stress reset ok,
"
  writel(LCDIF_CTRL1_VSYNC_EDGE_IRQ, &regs->hw_lcdif_ctrl1_clr);
  while (--timeout) {
	  if (readl(&regs->hw_lcdif_ctrl1) & LCDIF_CTRL1_VSYNC_EDGE_IRQ)
		  break;
	  udelay(1);
  }
"
Here we use lcdif_power_down API which is better to shutdown lcdif same as
the way used in arch_preboot_os.

Implement reset_misc for mx7, since it does not hurt for others boards.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
---
 arch/arm/cpu/armv7/mx7/soc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'arch/arm')

diff --git a/arch/arm/cpu/armv7/mx7/soc.c b/arch/arm/cpu/armv7/mx7/soc.c
index 5b8ae2e..586a6f2 100644
--- a/arch/arm/cpu/armv7/mx7/soc.c
+++ b/arch/arm/cpu/armv7/mx7/soc.c
@@ -17,6 +17,7 @@
 #include <asm/arch/crm_regs.h>
 #include <dm.h>
 #include <imx_thermal.h>
+#include <mxsfb.h>
 #ifdef CONFIG_FASTBOOT
 #ifdef CONFIG_ANDROID_RECOVERY
 #include <recovery.h>
@@ -386,6 +387,13 @@ void s_init(void)
 	return;
 }
 
+void reset_misc(void)
+{
+#ifdef CONFIG_VIDEO_MXS
+	lcdif_power_down();
+#endif
+}
+
 #ifdef CONFIG_FASTBOOT
 
 #ifdef CONFIG_ANDROID_RECOVERY
-- 
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