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H A D | sun50i-h6-tanix-tx6.dts | 35f2f8b8 Thu Jul 22 11:12:19 CDT 2021 Jernej Skrabec <jernej.skrabec@gmail.com> arm64: dts: allwinner: h6: tanix-tx6: Add PIO power supplies
While there is no publicly available schematic of this board, it's not hard to determine voltage of GPIO port C, D and G (only ones which can be set).
Port C and G are used for MMC/SDIO communication, so they use 1.8 V power supply. It's not clear if port D is even used, but if it is, it's pretty safe to assume it uses 3.3 V power supply. Value read from PIO Group Withstand Voltage Mode Select register from within pre-installed Android agrees with that assesment.
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20210722161220.51181-3-jernej.skrabec@gmail.com
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