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>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c
index b4471931b877..975281980299 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 */