Messages in this thread Patch in this message | | | From | Stephan Gerhold <> | Date | Tue, 28 Nov 2023 10:48:35 +0100 | Subject | [PATCH 1/3] dt-bindings: i2c: qcom,i2c-qup: Document power-domains |
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Similar to qcom,geni-i2c, for i2c-qup we need to vote for performance states on the VDDCX power domain to ensure that required clock rates can be generated correctly.
I2C is typically used with a fixed clock rate, so a single required-opp is sufficient without a full OPP table (unlike spi-qup for example).
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com> --- Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml index f43947514d48..fc3077a7af0d 100644 --- a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml @@ -52,9 +52,15 @@ properties: - const: default - const: sleep + power-domains: + maxItems: 1 + reg: maxItems: 1 + required-opps: + maxItems: 1 + required: - compatible - clock-names @@ -68,6 +74,7 @@ examples: - | #include <dt-bindings/clock/qcom,gcc-msm8998.h> #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/power/qcom-rpmpd.h> i2c@c175000 { compatible = "qcom,i2c-qup-v2.2.1"; @@ -82,6 +89,8 @@ examples: pinctrl-names = "default", "sleep"; pinctrl-0 = <&blsp1_i2c1_default>; pinctrl-1 = <&blsp1_i2c1_sleep>; + power-domains = <&rpmpd MSM8909_VDDCX>; + required-opps = <&rpmpd_opp_svs_krait>; clock-frequency = <400000>; #address-cells = <1>; -- 2.39.2
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