From 22ee3ba611e0aa73228ae64fa68d89c52367702a Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@igel.co.jp>
Date: Wed, 22 Oct 2008 18:25:39 +0900
Subject: sh: use 10MHz VIO_CLK for ov772x on Migo-R
Use a slower VIO_CKO clock frequency for the ov772x on Migo-R.
This improves the camera picture quality on Panel Board V2.1.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-migor/setup.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
(limited to 'arch/sh/boards/mach-migor')
diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c
index b447193..9752819 100644
--- a/arch/sh/boards/mach-migor/setup.c
+++ b/arch/sh/boards/mach-migor/setup.c
@@ -288,8 +288,11 @@ static struct clk *camera_clk;
static void camera_power_on(void)
{
+ /* Use 10 MHz VIO_CKO instead of 24 MHz to work
+ * around signal quality issues on Panel Board V2.1.
+ */
camera_clk = clk_get(NULL, "video_clk");
- clk_set_rate(camera_clk, 24000000);
+ clk_set_rate(camera_clk, 10000000);
clk_enable(camera_clk); /* start VIO_CKO */
/* use VIO_RST to take camera out of reset */
--
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