From: Yang Xiwen <forbidden405@xxxxxxxxxxx> For some on-soc buses, it is also needed to deassert the resets before access. Document it in the binding. Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Signed-off-by: Yang Xiwen <forbidden405@xxxxxxxxxxx> --- Documentation/devicetree/bindings/bus/simple-pm-bus.yaml | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml b/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml index 182134d7a6a3..430638104980 100644 --- a/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml +++ b/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml @@ -14,8 +14,9 @@ description: | driver, as it's typically initialized by the boot loader. However, its bus controller is part of a PM domain, or under the control - of a functional clock. Hence, the bus controller's PM domain and/or - clock must be enabled for child devices connected to the bus (either + of a functional clock, and it might have a reset control signal. Hence, + the bus controller's PM domain and/or clock must be enabled, reset control + signal must be deasserted for child devices connected to the bus (either on-SoC or externally) to function. While "simple-pm-bus" follows the "simple-bus" set of properties, as @@ -49,6 +50,8 @@ properties: # Required if clocks is absent, optional otherwise minItems: 1 + resets: true + required: - compatible - '#address-cells' -- 2.43.0