> Subject: [PATCH v1] arm: dts: verdin-imx8mm/imx8mp: use gpio-hog for > sleep moci > > From: Stefan Eichenberger <stefan.eichenber...@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.ke/ > rnel.org%2Flinux-devicetree%2F20240405160720.5977-1- > eichest%40gmail.com%2F&data=05%7C02%7Cpeng.fan%40nxp.com%7C0ec7 > 6e3870ef48ab53fd08dc5ebb433c%7C686ea1d3bc2b4c6fa92cd99c5c301635 > %7C0%7C0%7C638489405607145323%7CUnknown%7CTWFpbGZsb3d8eyJ > WIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D% > 7C0%7C%7C%7C&sdata=jSxtB3eu0uvBO0UPV8TY16yrEgCdTqgj6fwrwmG%2F > v7s%3D&reserved=0 > The U-Boot patch can be applied without it and will not break the build. > > Signed-off-by: Stefan Eichenberger <stefan.eichenber...@toradex.com>
Reviewed-by: Peng Fan <peng....@nxp.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