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ARM: dts: rk3288-evb-rk1608: using bb io-domain 1.8v

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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 <zhengxing@rock-chips.com>
This commit is contained in:
Xing Zheng
2017-12-15 19:56:18 +08:00
parent 53d1fcd77e
commit 48ec76438e
1 changed files with 1 additions and 0 deletions
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arch/arm/boot/dts/rk3288-evb-rk1608.dts
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@@ -616,6 +616,7 @@
&io_domains {
status = "okay";
bb-supply = <&vcc_18>;
sdcard-supply = <&vccio_sd>;
wifi-supply = <&vcc_18>;
};