arm: dts: verdin-imx8mm/imx8mp: use gpio-hog for sleep moci
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 23fe2def1edf
("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>
diff --git a/arch/arm/dts/imx8mm-verdin-wifi-dev-u-boot.dtsi b/arch/arm/dts/imx8mm-verdin-wifi-dev-u-boot.dtsi
index 38db560..8b397f5 100644
--- a/arch/arm/dts/imx8mm-verdin-wifi-dev-u-boot.dtsi
+++ b/arch/arm/dts/imx8mm-verdin-wifi-dev-u-boot.dtsi
@@ -60,6 +60,11 @@
ctrl-sleep-moci-hog {
bootph-pre-ram;
+ gpio-hog;
+ output-high;
+ gpios = <1 GPIO_ACTIVE_HIGH>;
+ line-name = "CTRL_SLEEP_MOCI#";
+
};
};
diff --git a/arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi b/arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi
index 03f211d..7b45a87 100644
--- a/arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi
+++ b/arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi
@@ -58,6 +58,10 @@
ctrl-sleep-moci-hog {
bootph-pre-ram;
+ gpio-hog;
+ output-high;
+ gpios = <29 GPIO_ACTIVE_HIGH>;
+ line-name = "CTRL_SLEEP_MOCI#";
};
};