[v1] ARM: dts: TQMa7: modify for use in bootloaders

[PATCH 3/3] ARM: dts: imx7-mba7: disable boot_cfg pins after boot

Posted by Alexander Feilke 1 month, 1 week ago

The BOOT_CFG pins are located on the LCD bus on our starterkit.
Disable them after boot to separate those signals.

Signed-off-by: Alexander Feilke <Alexander.Feilke@ew.tq-group.com>
---
 arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
index 03f2f2cbdfbc..4192adb27223 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
@@ -287,6 +287,15 @@ &flexcan2 {
 	status = "okay";
 };
 
+&gpio4 {
+	/* Deassert BOOT_EN after boot to separate BOOT_CFG circuits from LCD signals */
+	boot-en-hog {
+		gpio-hog;
+		gpios = <3 GPIO_ACTIVE_LOW>;
+		output-low;
+	};
+};
+
 &i2c1 {
 	lm75: temperature-sensor@49 {
 		compatible = "national,lm75a";
-- 
2.43.0

Re: [PATCH 3/3 v2] ARM: dts: imx7-mba7: separate BOOT_CFG circuits after boot

Posted by alexander.feilke@ew.tq-group.com 1 month, 1 week ago

Deassert BOOT_EN after boot to separate BOOT_CFG
circuits from LCD signals.

Signed-off-by: Alexander Feilke <Alexander.Feilke@ew.tq-group.com>
---
V1 -> V2: Updated Commit Message

 arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
index 03f2f2cbdfbc..4192adb27223 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
@@ -287,6 +287,15 @@ &flexcan2 {
 	status = "okay";
 };
 
+&gpio4 {
+	/* Deassert BOOT_EN after boot to separate BOOT_CFG circuits from LCD signals */
+	boot-en-hog {
+		gpio-hog;
+		gpios = <3 GPIO_ACTIVE_LOW>;
+		output-low;
+	};
+};
+
 &i2c1 {
 	lm75: temperature-sensor@49 {
 		compatible = "national,lm75a";
-- 
2.43.0

Re: [PATCH 3/3] ARM: dts: imx7-mba7: disable boot_cfg pins after boot

Posted by Frank Li 1 month, 1 week ago

On Wed, Feb 18, 2026 at 02:54:14PM +0100, Alexander Feilke wrote:
> The BOOT_CFG pins are located on the LCD bus on our starterkit.
> Disable them after boot to separate those signals.

Your comments is more clear.  Is below commit massage better?

ARM: dts: imx7-mba7: Deassert BOOT_EN to separate BOOT_CFG circuits after boot

Deassert BOOT_EN after boot to separate BOOT_CFG circuits from LCD signals.

Frank
>
> Signed-off-by: Alexander Feilke <Alexander.Feilke@ew.tq-group.com>
> ---
>  arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
> index 03f2f2cbdfbc..4192adb27223 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
> +++ b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
> @@ -287,6 +287,15 @@ &flexcan2 {
>  	status = "okay";
>  };
>
> +&gpio4 {
> +	/* Deassert BOOT_EN after boot to separate BOOT_CFG circuits from LCD signals */
> +	boot-en-hog {
> +		gpio-hog;
> +		gpios = <3 GPIO_ACTIVE_LOW>;
> +		output-low;
> +	};
> +};
> +
>  &i2c1 {
>  	lm75: temperature-sensor@49 {
>  		compatible = "national,lm75a";
> --
> 2.43.0
>

Re: [PATCH 3/3] ARM: dts: imx7-mba7: disable boot_cfg pins after boot

Posted by alexander.feilke@ew.tq-group.com 1 month, 1 week ago

On Wednesday, February 18, 2026 17:42 CET, Frank Li <Frank.li@nxp.com> wrote:

> On Wed, Feb 18, 2026 at 02:54:14PM +0100, Alexander Feilke wrote:
> > The BOOT_CFG pins are located on the LCD bus on our starterkit.
> > Disable them after boot to separate those signals.
> 
> Your comments is more clear.  Is below commit massage better?
> 
> ARM: dts: imx7-mba7: Deassert BOOT_EN to separate BOOT_CFG circuits after boot
> 
> Deassert BOOT_EN after boot to separate BOOT_CFG circuits from LCD signals.
> 
> Frank

Agreed. I can send an updated patch if the rest seems ok