From 57b4ca42359c63ad61548431c184a7d63efbd0b9 Mon Sep 17 00:00:00 2001 From: Jonas Karlman Date: Wed, 23 Jul 2025 08:56:46 +0000 Subject: [PATCH] dt-bindings: serial: snps-dw-apb-uart: Allow use of a power-domain 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 Reviewed-by: Rob Herring (Arm) Link: https://lore.kernel.org/r/20250723085654.2273324-5-jonas@kwiboo.se Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml index 8f1b7f704c5bc..cb9da6c97afcf 100644 --- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml +++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml @@ -108,6 +108,9 @@ properties: parameter. Define this if your UART does not implement the busy functionality. type: boolean + power-domains: + maxItems: 1 + resets: minItems: 1 maxItems: 2 -- 2.47.2