[PATCH v1] arm: dts: verdin-imx8mm/imx8mp: use gpio-hog for sleep moci

[Stefan Eichenberger <eichest@gmail.com>]

From: Stefan Eichenberger <stefan.eichenberger@toradex.com>

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>
---
 arch/arm/dts/imx8mm-verdin-wifi-dev-u-boot.dtsi | 5 +++++
 arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi | 4 ++++
 2 files changed, 9 insertions(+)

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 38db56059d..8b397f535c 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 03f211d5f7..7b45a87450 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#";
 	};
 };
 
-- 
2.40.1