Messages in this thread Patch in this message | | | From | Doug Anderson <> | Subject | [PATCH] ARM: dts: Switch i2c0 to 400kHz on rk3288-evb-rk808 | Date | Wed, 10 Sep 2014 21:30:15 -0700 |
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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> --- 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 36db177..ff522f8 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 { -- 2.1.0.rc2.206.gedb03e5
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