From 0f4fc382428f71453d195925a3c63efc48452417 Mon Sep 17 00:00:00 2001 From: Doug Anderson 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 Reviewed-by Addy Ke Tested-by Addy Ke Signed-off-by: Heiko Stuebner --- 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 36db177f6a5a..ff522f8e3df4 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 { -- 2.20.1