From 48ec76438ed52afbcf3a66cf437eae16e57fd695 Mon Sep 17 00:00:00 2001 From: Xing Zheng Date: Fri, 15 Dec 2017 19:56:18 +0800 Subject: [PATCH] ARM: dts: rk3288-evb-rk1608: using bb io-domain 1.8v The rk3288-evb-rk1608 hardware using APIO5_VDD 1.8v, the default 3.3v bb-iomain cause the abnormal waveform (<1V @24MHz) on the SPI0 bus (GPIO3_B7~B4), even with max driving strength 12mA. So we need to switch the bb-iodomain to 1.8v, then the waveform is corrent. Change-Id: I0fa49e5348897933ee56867ca458ec3aa519bcba Signed-off-by: Xing Zheng --- arch/arm/boot/dts/rk3288-evb-rk1608.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/rk3288-evb-rk1608.dts b/arch/arm/boot/dts/rk3288-evb-rk1608.dts index fc4b8a993c38..42fee1b7e109 100644 --- a/arch/arm/boot/dts/rk3288-evb-rk1608.dts +++ b/arch/arm/boot/dts/rk3288-evb-rk1608.dts @@ -616,6 +616,7 @@ &io_domains { status = "okay"; + bb-supply = <&vcc_18>; sdcard-supply = <&vccio_sd>; wifi-supply = <&vcc_18>; };