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| author | Stephan Gerhold <stephan.gerhold@kernkonzept.com> | 2023-11-28 12:48:35 +0300 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@kernel.org> | 2025-03-18 23:53:53 +0300 |
| commit | 48277423e533e9fc3343cf192f05045fc09bdedc (patch) | |
| tree | c2c8433425841c4e12235f6571f41915c59428c0 | |
| parent | 1a64b21282ddc4f7ec8aeb8195c20cf15bd32525 (diff) | |
| download | linux-48277423e533e9fc3343cf192f05045fc09bdedc.tar.xz | |
dt-bindings: i2c: qcom,i2c-qup: Document power-domains
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>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20231128-i2c-qup-dvfs-v1-1-59a0e3039111@kernkonzept.com
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml | 9 |
1 files changed, 9 insertions, 0 deletions
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>; |