linux-kernel - Re: [PATCH v1] arm64: dts: k3-am625-verdin: enable Verdin UART2

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Message-ID: <20231123071235.omgxs3ixnojpkfvu@greeter>
Date:   Thu, 23 Nov 2023 01:12:35 -0600
From:   Nishanth Menon <nm@...com>
To:     Parth Pancholi <parth105105@...il.com>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Parth Pancholi <parth.pancholi@...adex.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Tero Kristo <kristo@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: Re: [PATCH v1] arm64: dts: k3-am625-verdin: enable Verdin UART2

On 17:04-20231121, Parth Pancholi wrote:
> From: Parth Pancholi <parth.pancholi@...adex.com>
> 
> Enable UART2 for AM62 based SOM's Verdin carrier boards Dahlia,
> Development and Yavia.
> Earlier Verdin UART2 was reserved by R5 DM firmware which can be now
> configured using boardcfg during U-boot compilation in the latest TI
> SDKs. In a default config, no one writes to this UART.
> 
> Signed-off-by: Parth Pancholi <parth.pancholi@...adex.com>
> 
> ---
> 
>  arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi | 3 +--
>  arch/arm64/boot/dts/ti/k3-am62-verdin-dev.dtsi    | 3 +--
>  arch/arm64/boot/dts/ti/k3-am62-verdin-yavia.dtsi  | 3 +--
>  3 files changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi
> index 013357d17d48..bf6d27e70bc4 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi
> @@ -214,6 +214,5 @@ &verdin_gpio_keys {
>  
>  /* Verdin UART_2 */
>  &wkup_uart0 {
> -	/* FIXME: WKUP UART0 is used by DM firmware */
> -	status = "reserved";
> +	status = "okay";
>  };
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin-dev.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin-dev.dtsi
> index 6701cb8974bb..680071688dcb 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62-verdin-dev.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62-verdin-dev.dtsi
> @@ -235,6 +235,5 @@ &verdin_gpio_keys {
>  
>  /* Verdin UART_2 */
>  &wkup_uart0 {
> -	/* FIXME: WKUP UART0 is used by DM firmware */
> -	status = "reserved";
> +	status = "okay";
>  };
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin-yavia.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin-yavia.dtsi
> index c685df7deaee..997dfafd27eb 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62-verdin-yavia.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62-verdin-yavia.dtsi
> @@ -207,6 +207,5 @@ &verdin_gpio_keys {
>  
>  /* Verdin UART_2 */
>  &wkup_uart0 {
> -	/* FIXME: WKUP UART0 is used by DM firmware */
> -	status = "reserved";
> +	status = "okay";
>  };
> -- 
> 2.34.1
> 

Do the &pinctrl_wkup_uart0 in verdin.dtsi hold good through these
variants?

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D