linux-kernel - [PATCH 09/19] clock-imx35: fix reboot in internal boot mode

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Message-Id: <1323757911-25217-9-git-send-email-eric@eukrea.com>
Date:	Tue, 13 Dec 2011 07:31:41 +0100
From:	Eric Bénard <eric@...rea.com>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Jason Liu <jason.hui@...aro.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	Russell King <linux@....linux.org.uk> (maintainer:ARM PORT),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 09/19] clock-imx35: fix reboot in internal boot mode

commit 8d75a2620dc3e33ce504044c375c443ed7ed4128 disable IIM
clock after reading silicon revision which will prevent
reboot in internal boot mode (see comment a few line before)

Signed-off-by: Eric Bénard <eric@...rea.com>
Cc: Jason Liu <jason.hui@...aro.org>
Cc: Sascha Hauer <kernel@...gutronix.de>
---
 arch/arm/mach-imx/clock-imx35.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-imx/clock-imx35.c b/arch/arm/mach-imx/clock-imx35.c
index 8116f11..b49a732 100644
--- a/arch/arm/mach-imx/clock-imx35.c
+++ b/arch/arm/mach-imx/clock-imx35.c
@@ -538,7 +538,10 @@ int __init mx35_clocks_init()
 
 	clk_enable(&iim_clk);
 	imx_print_silicon_rev("i.MX35", mx35_revision());
-	clk_disable(&iim_clk);
+	/* Don't disable IIM clock if we came up in internal boot mode */
+	if (__raw_readl(CCM_BASE + CCM_RCSR) & (3 << 10)) {
+		clk_disable(&iim_clk);
+	}
 
 #ifdef CONFIG_MXC_USE_EPIT
 	epit_timer_init(&epit1_clk,
-- 
1.7.6.4

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