From: Sachin Kamat <sachin.kamat@linaro.org>
Date: Wed, 11 Dec 2013 22:45:12 +0000 (+0900)
Subject: ARM: dts: Update display clock frequency for Origen-4412
X-Git-Tag: firefly_0821_release~176^2~4591^2~9^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=236940d2c951a84735fdd7b958b5159eaf501784;p=firefly-linux-kernel-4.4.55.git

ARM: dts: Update display clock frequency for Origen-4412

As per the timing information for supported panel, the value should
be between 47.2 MHz to 47.9 MHz for 60Hz refresh rate.

Total horizontal pixels = 1024 (x-res) + 80 (margin) + 48 (hsync) = 1152
Total vertical pixels = 600 (y-res) + 80 (margin) + 3 (vsync) = 683

Target pixel clock rate for refresh rate @60 Hz
	= 1152 * 683 * 60 = 47208960 Hz ~ 47.5 MHz

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---

diff --git a/arch/arm/boot/dts/exynos4412-origen.dts b/arch/arm/boot/dts/exynos4412-origen.dts
index d65984c440f6..95201559c3ad 100644
--- a/arch/arm/boot/dts/exynos4412-origen.dts
+++ b/arch/arm/boot/dts/exynos4412-origen.dts
@@ -159,7 +159,7 @@
 	display-timings {
 		native-mode = <&timing0>;
 		timing0: timing {
-			clock-frequency = <50000>;
+			clock-frequency = <47500000>;
 			hactive = <1024>;
 			vactive = <600>;
 			hfront-porch = <64>;