Re: [PATCH 6/9] dt-bindings: gpio: rockchip: Allow use of a power-domain

From: Rob Herring <robh@kernel.org>
To: Jonas Karlman <jonas@kwiboo.se>
Cc: Heiko Stuebner <heiko@sntech.de>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <brgl@bgdev.pl>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>, Yao Zi <ziyao@disroot.org>,
	Chukun Pan <amadeus@jmu.edu.cn>,
	linux-rockchip@lists.infradead.org, linux-pm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 6/9] dt-bindings: gpio: rockchip: Allow use of a power-domain
Date: Tue, 27 May 2025 14:34:39 -0500	[thread overview]
Message-ID: <20250527193439.GA1101149-robh@kernel.org> (raw)
In-Reply-To: <20250518220707.669515-7-jonas@kwiboo.se>

On Sun, May 18, 2025 at 10:06:53PM +0000, Jonas Karlman wrote:
> The GPIO controllers in most Rockchip SoCs are part or power domains
> that are always powered on, i.e. PD_BUS or PD_PMU.

Are these described in DT, so this is valid to add for all SoCs?

> On RK3528 the GPIO controllers are spread out among the PD_RKVENC, PD_VO
> and PD_VPU power domains.

So should be required for RK3528?

> 
> Add support to describe power-domains for the GPIO controllers.
> 
> Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
> ---
>  Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
> index d76987ce8e50..bdd83f42615c 100644
> --- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
> +++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
> @@ -41,6 +41,9 @@ properties:
>    "#interrupt-cells":
>      const: 2
>  
> +  power-domains:
> +    maxItems: 1
> +
>  patternProperties:
>    "^.+-hog(-[0-9]+)?$":
>      type: object
> -- 
> 2.49.0
> 

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