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arm: dts: verdin-imx8mm/imx8mp: use gpio-hog for sleep moci

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In Linux, we allow sleep moci to be turned off when the carrier board
supports it and the system is in suspend. In U-Boot, however, we want
the sleep moci to be always on. So we use a gpio hog and disable the
regulator. This change is necessary because we switched to upstream
device tree files with commit 23fe2def1e
("verdin-imx8mm/verdin-imx8mp: move imx verdins to OF_UPSTREAM"). A
recent upstream patch removes the gpio hog from the Linux device tree,
so we need to add it to the u-boot dtsi. The following patch will remove
the gpio hog from the Linux device tree:
https://lore.kernel.org/linux-devicetree/20240405160720.5977-1-eichest@gmail.com/
The U-Boot patch can be applied without it and will not break the build.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
This commit is contained in:
Stefan Eichenberger 2024-04-17 10:49:02 +02:00 • committed by Fabio Estevam
parent 8c352a61ee
commit 45d14c0120
2 changed files with 9 additions and 0 deletions
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5
arch/arm/dts/imx8mm-verdin-wifi-dev-u-boot.dtsi
View file

@ -60,6 +60,11 @@
ctrl-sleep-moci-hog { ctrl-sleep-moci-hog {
bootph-pre-ram; bootph-pre-ram;
gpio-hog;
output-high;
gpios = <1 GPIO_ACTIVE_HIGH>;
line-name = "CTRL_SLEEP_MOCI#";
}; };
}; };

4
arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi
View file

@ -58,6 +58,10 @@
ctrl-sleep-moci-hog { ctrl-sleep-moci-hog {
bootph-pre-ram; bootph-pre-ram;
gpio-hog;
output-high;
gpios = <29 GPIO_ACTIVE_HIGH>;
line-name = "CTRL_SLEEP_MOCI#";
}; };
}; };