From 692079bda7802fccbf82daeb93d47d3d92972bbf Mon Sep 17 00:00:00 2001 From: Stephan Gerhold Date: Tue, 28 Nov 2023 10:43:32 +0100 Subject: [PATCH] dt-bindings: serial: qcom,msm-uartdm: Vote for shared resources Document power-domains, operating-points-v2 and interconnects to allow making performance state votes for certain clock frequencies of the UART DM controller. The interconnect path to DRAM is needed when UART DM is used together with a DMA engine. Voting for these shared resources is necessary to guarantee performance with power management enabled. Otherwise these resources might run at minimal performance state which is not sufficient for certain UART baud rates. Signed-off-by: Stephan Gerhold Reviewed-by: Rob Herring Link: https://lore.kernel.org/r/20231128-serial-msm-dvfs-v1-1-4f290d20a4be@kernkonzept.com Signed-off-by: Greg Kroah-Hartman --- .../devicetree/bindings/serial/qcom,msm-uartdm.yaml | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.yaml b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.yaml index ee52bf8e8917d..e0fa363ad7e2e 100644 --- a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.yaml +++ b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.yaml @@ -48,9 +48,17 @@ properties: - const: tx - const: rx + interconnects: + maxItems: 1 + interrupts: maxItems: 1 + operating-points-v2: true + + power-domains: + maxItems: 1 + qcom,rx-crci: $ref: /schemas/types.yaml#/definitions/uint32 description: @@ -99,7 +107,9 @@ unevaluatedProperties: false examples: - | + #include #include + #include serial@f991e000 { compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm"; @@ -109,4 +119,7 @@ examples: clock-names = "core", "iface"; dmas = <&dma0 0>, <&dma0 1>; dma-names = "tx", "rx"; + power-domains = <&rpmpd MSM8996_VDDCX>; + operating-points-v2 = <&uart_opp_table>; + interconnects = <&pnoc MASTER_BLSP_1 &bimc SLAVE_EBI_CH0>; }; -- 2.30.2