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arm64: dts: meson: switch TFLASH_VDD_EN pin to open drain on Odroid-C4

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[ Upstream commit daf12bee07b9e2f38216f58aca7ac4e4e66a7146 ]

For the proper reboot Odroid-C4 board requires to switch TFLASH_VDD_EN
pin to the high impedance mode, otherwise the board is stuck in the
middle of loading early stages of the bootloader from SD card.

This can be achieved by using the OPEN_DRAIN flag instead of the
ACTIVE_HIGH, what will leave the pin in input mode to achieve high state
(pin has the pull-up) and solve the issue.

Suggested-by: Neil Armstrong <narmstrong@baylibre.com>
Fixes: 326e57518b ("arm64: dts: meson-sm1: add support for Hardkernel ODROID-C4")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20210122055218.27241-1-m.szyprowski@samsung.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Marek Szyprowski 2021-01-22 06:52:18 +01:00 committed by Greg Kroah-Hartman
parent 6f5ee57a68
commit ee1709a311
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/boot/dts/amlogic/meson-sm1-odroid-c4.dts
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@ -52,7 +52,7 @@ tflash_vdd: regulator-tflash_vdd {
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpio = <&gpio_ao GPIOAO_3 GPIO_ACTIVE_HIGH>;
gpio = <&gpio_ao GPIOAO_3 GPIO_OPEN_DRAIN>;
enable-active-high;
regulator-always-on;
};