linux-kernel - Re: [PATCH 10/13] arm64: dts: ti: k3-j7200: Enable GPIO nodes at the board level

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Date:   Mon, 7 Aug 2023 11:08:34 +0530
From:   Dhruva Gole <d-gole@...com>
To:     Andrew Davis <afd@...com>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/13] arm64: dts: ti: k3-j7200: Enable GPIO nodes at the
 board level

Andrew,

On 03/08/23 02:23, Andrew Davis wrote:
> GPIO nodes defined in the top-level J7200 SoC dtsi files are incomplete
> and may not be functional unless they are extended with pinmux and
> device information.
> 
> Disable the GPIO nodes in the dtsi files and only enable the ones that
> are actually pinned out on a given board.
> 
> Signed-off-by: Andrew Davis <afd@...com>
> ---
>   .../boot/dts/ti/k3-j7200-common-proc-board.dts | 18 ++++--------------
>   arch/arm64/boot/dts/ti/k3-j7200-main.dtsi      |  4 ++++
>   .../arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi |  2 ++
>   3 files changed, 10 insertions(+), 14 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> index dee9056f56051..4a5c4f36baeec 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> @@ -240,27 +240,17 @@ &main_uart3 {
>   	pinctrl-0 = <&main_uart3_pins_default>;
>   };
>   
> -&main_gpio2 {
> -	status = "disabled";
> -};
> -
> -&main_gpio4 {
> -	status = "disabled";
> -};
> -
> -&main_gpio6 {
> -	status = "disabled";
> +&main_gpio0 {
> +	status = "okay";
> +	/* default pins */

Small question, where is the pmx for main_gpio0? What does "default pins"
refer to here? Where are they pinmuxed?

>   };
>   
>   &wkup_gpio0 {
> +	status = "okay";
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&wkup_gpio_pins_default>;
>   };
>   
> -&wkup_gpio1 {
> -	status = "disabled";
> -};
> -
>   &mcu_cpsw {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&mcu_cpsw_pins_default>, <&mcu_mdio_pins_default>;
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> index 5d7542ba41b93..6a776f3bbcb19 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> @@ -832,6 +832,7 @@ main_gpio0: gpio@...000 {
>   		power-domains = <&k3_pds 105 TI_SCI_PD_EXCLUSIVE>;
>   		clocks = <&k3_clks 105 0>;
>   		clock-names = "gpio";
> +		status = "disabled";
>   	};
>   
>   	main_gpio2: gpio@...000 {
> @@ -849,6 +850,7 @@ main_gpio2: gpio@...000 {
>   		power-domains = <&k3_pds 107 TI_SCI_PD_EXCLUSIVE>;
>   		clocks = <&k3_clks 107 0>;
>   		clock-names = "gpio";
> +		status = "disabled";
>   	};
>   
>   	main_gpio4: gpio@...000 {
> @@ -866,6 +868,7 @@ main_gpio4: gpio@...000 {
>   		power-domains = <&k3_pds 109 TI_SCI_PD_EXCLUSIVE>;
>   		clocks = <&k3_clks 109 0>;
>   		clock-names = "gpio";
> +		status = "disabled";
>   	};
>   
>   	main_gpio6: gpio@...000 {
> @@ -883,6 +886,7 @@ main_gpio6: gpio@...000 {
>   		power-domains = <&k3_pds 111 TI_SCI_PD_EXCLUSIVE>;
>   		clocks = <&k3_clks 111 0>;
>   		clock-names = "gpio";
> +		status = "disabled";
>   	};
>   
>   	main_spi0: spi@...0000 {
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> index 571eb0e2eac92..5ae7320efad7b 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> @@ -297,6 +297,7 @@ wkup_gpio0: gpio@...10000 {
>   		power-domains = <&k3_pds 113 TI_SCI_PD_EXCLUSIVE>;
>   		clocks = <&k3_clks 113 0>;
>   		clock-names = "gpio";
> +		status = "disabled";
>   	};
>   
>   	wkup_gpio1: gpio@...00000 {
> @@ -313,6 +314,7 @@ wkup_gpio1: gpio@...00000 {
>   		power-domains = <&k3_pds 114 TI_SCI_PD_EXCLUSIVE>;
>   		clocks = <&k3_clks 114 0>;
>   		clock-names = "gpio";
> +		status = "disabled";
>   	};
>   
>   	mcu_navss: bus@...80000 {

-- 
Thanks and Regards,
Dhruva Gole