linux-kernel - Re: [PATCH v2 2/5] dt-bindings: i2c: i2c-rk3x: Allow use of a power-domain

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Message-ID: <175327843600.2144777.12217048091920354736.robh@kernel.org>
Date: Wed, 23 Jul 2025 08:47:16 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Jonas Karlman <jonas@...boo.se>
Cc: linux-arm-kernel@...ts.infradead.org, Yao Zi <ziyao@...root.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-kernel@...r.kernel.org,
	Chukun Pan <amadeus@....edu.cn>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	devicetree@...r.kernel.org, linux-i2c@...r.kernel.org,
	Heiko Stuebner <heiko@...ech.de>,
	linux-rockchip@...ts.infradead.org,
	Andi Shyti <andi.shyti@...nel.org>
Subject: Re: [PATCH v2 2/5] dt-bindings: i2c: i2c-rk3x: Allow use of a
 power-domain


On Wed, 23 Jul 2025 08:56:44 +0000, Jonas Karlman wrote:
> The I2C controllers in most Rockchip SoCs are part of power domains that
> are always powered on, i.e. PD_BUS or PD_PMU. These always powered
> on power domains have typically not been described in the device tree.
> 
> Because these power domains have been left out of the device tree there
> has not been any real need to properly describe the I2C controllers
> power domain.
> 
> On RK3528 the I2C controllers are spread out among the described
> PD_RKVENC, PD_VO and PD_VPU power domains. However, one I2C controller
> belong to an undescribed always powered on power domain.
> 
> Add support to describe an optional power-domains for the I2C
> controllers in Rockchip SoCs.
> 
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> ---
> v2: Update commit message
> ---
>  Documentation/devicetree/bindings/i2c/i2c-rk3x.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>