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

[Martin Blumenstingl]

Hi Marek,

thank you for this patch!

On Fri, Dec 18, 2020 at 11:23 AM Marek Szyprowski
<m.szyprowski at samsung.com> wrote:
>
> 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 if the
I think this should read "instead of ACTIVE_HIGH"

> ACTIVE_HIGH, what will leave the pin in input to achieve high state (pin
> has the pull-up) and solve the issue.
>
> Suggested-by: Neil Armstrong <narmstrong at baylibre.com>
> Fixes: 326e57518b0d ("arm64: dts: meson-sm1: add support for Hardkernel ODROID-C4")
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl at googlemail.com>

> ---
> Here is a discussion on u-boot's mailing list that inspired this patch:
> https://lists.denx.de/pipermail/u-boot/2020-December/435295.html
I'm used to datasheets not being up-to-date. but now also the
schematics don't seem to match the actual HW? :-(


Best regards,
Martin