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arm64: dts: meson: bananapi-m5: switch VDDIO_C pin to OPEN_DRAIN

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For proper warm (re)boot from SD card the BPI-M5 board requires TFLASH_VDD_EN
and VDDIO_C pins to be switched to high impedance mode. This can be achieved
using OPEN_DRAIN instead of ACTIVE_HIGH to leave the GPIO pins in input mode
and retain high state (pin has the pull-up).

This change is inspired by meson-sm1-odroid.dtsi where OPEN_DRAIN has been
used to resolve similar problems with the Odroid C4 board (TF_IO in the C4
dts is the equivalent regulator).

Fixes: 976e920183 ("arm64: dts: meson-sm1: add Banana PI BPI-M5 board dts")
Suggested-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230127142221.3718184-2-christianshewitt@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
This commit is contained in:
Christian Hewitt
2023-01-27 14:22:17 +00:00
committed by Neil Armstrong
parent ce43ea00b9
commit 856968e066
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts
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@@ -123,7 +123,7 @@ vddio_c: regulator-vddio_c {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
enable-gpio = <&gpio_ao GPIOE_2 GPIO_ACTIVE_HIGH>;
enable-gpio = <&gpio_ao GPIOE_2 GPIO_OPEN_DRAIN>;
enable-active-high;
regulator-always-on;