From 0f4fc382428f71453d195925a3c63efc48452417 Mon Sep 17 00:00:00 2001
From: Doug Anderson <dianders@chromium.org>
Date: Wed, 10 Sep 2014 21:30:15 -0700
Subject: [PATCH] ARM: dts: Switch i2c0 to 400kHz on rk3288-evb-rk808
We should be able to talk to the PMIC at 400kHz. No need to talk at
the slow 100kHz.
As measured by ftrace (with a bunch of extra patches, since cpufreq
for rk808 hasn't landed yet):
before this change: cpu0_set_target() => ~500us
after this change: cpu0_set_target() => ~300us
Signed-off-by: Doug Anderson <dianders@chromium.org>
Reviewed-by Addy Ke <addy.ke@rock-chips.com>
Tested-by Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
arch/arm/boot/dts/rk3288-evb-rk808.dts | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/rk3288-evb-rk808.dts b/arch/arm/boot/dts/rk3288-evb-rk808.dts
index 36db177f6a5a3..ff522f8e3df4e 100644
--- a/arch/arm/boot/dts/rk3288-evb-rk808.dts
+++ b/arch/arm/boot/dts/rk3288-evb-rk808.dts
@@ -18,6 +18,7 @@
};
&i2c0 {
+ clock-frequency = <400000>;
status = "okay";
rk808: pmic@1b {
--
2.30.2