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arm64: dts: imx8mq-librem5-r3: Mark buck3 as always on

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[ Upstream commit a362b0cc94 ]

Commit 99e71c0292 ("arm64: dts: imx8mq-librem5: Don't mark buck3 as always on")
removed always-on marking from GPU regulator, which is great for power
saving - however it introduces additional i2c0 traffic which can be deadly
for devices from the Dogwood batch.

To workaround the i2c0 shutdown issue on Dogwood, this commit marks
buck3 as always-on again - but only for Dogwood (r3).

Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sebastian Krzyszkowiak 2021-03-15 09:35:30 +01:00 • committed by Greg Kroah-Hartman
commit e5da8b37ce
1 changed files with 4 additions and 0 deletions
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arch/arm64/boot/dts/freescale/imx8mq-librem5-r3.dts
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@ -22,6 +22,10 @@
ti,termination-current = <144000>; /* uA */
};
&buck3_reg {
regulator-always-on;
};
&proximity {
proximity-near-level = <25>;
};