Re: [PATCH 2/3] arm64: dts: ti: k3-am62p-verdin: Reserve UART_4 for Cortex-R5F

[Vignesh Raghavendra]

On 2026-06-02 15:13 +0100, Vitor Soares wrote:
> From: Vitor Soares <vitor.soares@xxxxxxxxxxx>
> 
> Add a device tree overlay reserving AM62P MCU_UART0 (Verdin UART_4) for
> use by the Cortex-R5F co-processor.
> 

Can we please reuse k3-am625-verdin-uart4-mcu.dtso (if required, rename
as generic one to be used across K3 verdin boards)? Else, we end up
having dtso for every peripheral that different remoteproc firmware.

> Signed-off-by: Vitor Soares <vitor.soares@xxxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/ti/Makefile                     |  4 ++++
>  .../boot/dts/ti/k3-am62p5-verdin-uart4-mcu.dtso     | 13 +++++++++++++
>  2 files changed, 17 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/ti/k3-am62p5-verdin-uart4-mcu.dtso
> 
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index f2db3c878993..27a56abb1d7f 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -84,6 +84,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-nonwifi-dev.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-nonwifi-ivy.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-nonwifi-mallow.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-nonwifi-yavia.dtb
> +dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-uart4-mcu.dtbo
>  dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-wifi-dahlia.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-wifi-dev.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am62p5-verdin-wifi-ivy.dtb
> @@ -277,6 +278,8 @@ k3-am62p5-sk-csi2-tevi-ov5640-dtbs := k3-am62p5-sk.dtb \
>  	k3-am62x-sk-csi2-tevi-ov5640.dtbo
>  k3-am62p5-verdin-wifi-dev-nau8822-btl-dtbs := k3-am62p5-verdin-wifi-dev.dtb \
>  	k3-am62p5-verdin-dev-nau8822-btl.dtbo
> +k3-am62p5-verdin-wifi-dev-uart4-mcu-dtbs := k3-am62p5-verdin-wifi-dev.dtb \
> +	k3-am62p5-verdin-uart4-mcu.dtbo
>  k3-am642-evm-icssg0-dtbs := \
>  	k3-am642-evm.dtb k3-am642-evm-icssg0.dtbo
>  k3-am642-evm-icssg1-dualemac-dtbs := \
> @@ -376,6 +379,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
>  	k3-am62p5-sk-csi2-ov5640.dtb \
>  	k3-am62p5-sk-csi2-tevi-ov5640.dtb \
>  	k3-am62p5-verdin-wifi-dev-nau8822-btl.dtb \
> +	k3-am62p5-verdin-wifi-dev-uart4-mcu.dtb \
>  	k3-am642-evm-icssg0.dtb \
>  	k3-am642-evm-icssg1-dualemac.dtb \
>  	k3-am642-evm-icssg1-dualemac-mii.dtb \
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-verdin-uart4-mcu.dtso b/arch/arm64/boot/dts/ti/k3-am62p5-verdin-uart4-mcu.dtso
> new file mode 100644
> index 000000000000..ad5d6a5c17c4
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-am62p5-verdin-uart4-mcu.dtso
> @@ -0,0 +1,13 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
> +/*
> + * Copyright (c) Toradex
> + *
> + * Verdin AM62P Cortex-R5F UART
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +&mcu_uart0 {
> +	status = "reserved";
> +};
> -- 
> 2.54.0
> 
>