arm64: dts: rockchip: override BIOS_DISABLE signal via GPIO hog on RK3399 Puma

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commit 741f5ba7cc upstream.

The Qseven BIOS_DISABLE signal on the RK3399-Q7 keeps the on-module eMMC
and SPI flash powered-down initially (in fact it keeps the reset signal
asserted). BIOS_DISABLE_OVERRIDE pin allows to override that signal so
that eMMC and SPI can be used regardless of the state of the signal.

Let's make this GPIO a hog so that it's reserved and locked in the
proper state.

At the same time, make sure the pin is reserved for the hog and cannot
be requested by another node.

Cc: stable@vger.kernel.org
Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Link: https://lore.kernel.org/r/20240731-puma-emmc-6-v1-2-4e28eadf32d0@cherry.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Quentin Schulz 2024-07-31 13:05:29 +02:00 • committed by Greg Kroah-Hartman

parent d52643ced1

commit 3844bc360e

1 changed files with 22 additions and 1 deletions

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arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi

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