]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
arm64: dts: mediatek: mt8186-corsola: Fix IT6505 reset line polarity
authorChen-Yu Tsai <wenst@chromium.org>
Tue, 29 Oct 2024 10:02:25 +0000 (18:02 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 9 Dec 2024 09:40:57 +0000 (10:40 +0100)
commit3f94622dbeaadb4918bc7b89c9055d43e4a740f9
tree349f9486b79684a32f0d91a318436e9f590a176a
parent2bea1d0e57ae4ff4c7947a44f1bcdfa3e451abf2
arm64: dts: mediatek: mt8186-corsola: Fix IT6505 reset line polarity

commit fbcc95fceb6d179dd150df2dc613dfd9b013052c upstream.

The reset line of the IT6505 bridge chip is active low, not active high.
It was incorrectly inverted in the device tree as the implementation at
the time incorrectly inverted the polarity in its driver, due to a prior
device having an inline inverting level shifter.

Fix the polarity now while the external display pipeline is incomplete,
thereby avoiding any impact to running systems.

A matching fix for the driver should be included if this change is
backported.

Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
Cc: stable@vger.kernel.org
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20241029100226.660263-1-wenst@chromium.org
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi