From be0ecdbed5efc7833275701ebdb1ff8ef7ffd4c0 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Mon, 28 Apr 2014 03:38:40 +0200
Subject: [PATCH] arm: mxs: Wait when disabling VDDMEM current limiter

According to i.MX23 datasheet Table 32-17, we must wait for the supply
to settle before disabling the current limiter. Indeed, not waiting a
little here causes the system to crash at times.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
---
 arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
index 3baf4ddefc..de8841a0e1 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
@@ -240,9 +240,14 @@ static void mx23_mem_setup_vddmem(void)
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)MXS_POWER_BASE;
 
+	/* We must wait before and after disabling the current limiter! */
+	early_delay(10000);
+
 	clrbits_le32(&power_regs->hw_power_vddmemctrl,
 		POWER_VDDMEMCTRL_ENABLE_ILIMIT);
 
+	early_delay(10000);
+
 }
 
 static void mx23_mem_init(void)
-- 
2.39.5