linux-kernel - Re: [PATCH v2 4/5] dt-bindings: serial: snps-dw-apb-uart: Allow use of a power-domain

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Message-ID: <175327846490.2145535.759049072094464087.robh@kernel.org>
Date: Wed, 23 Jul 2025 08:47:45 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Jonas Karlman <jonas@...boo.se>
Cc: devicetree@...r.kernel.org, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Jiri Slaby <jirislaby@...nel.org>, Yao Zi <ziyao@...root.org>,
	Heiko Stuebner <heiko@...ech.de>, Chukun Pan <amadeus@....edu.cn>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Conor Dooley <conor+dt@...nel.org>,
	linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v2 4/5] dt-bindings: serial: snps-dw-apb-uart: Allow use
 of a power-domain


On Wed, 23 Jul 2025 08:56:46 +0000, Jonas Karlman wrote:
> The UART controllers in most Rockchip SoCs are part of power domains
> that are always powered on. 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 UART controllers
> power domain of Rockchip SoCs.
> 
> On Rockchip RK3528 the UART controllers are spread out among the
> described PD_RKVENC, PD_VO and PD_VPU power domains. However, one UART
> controller belong to an undescribed always powered on power domain.
> 
> Add support to describe an optional power-domains for the UART
> controllers.
> 
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> ---
> v2: New patch
> ---
>  Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 

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