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authorTodor Tomov <todor.tomov@linaro.org>2020-04-07 10:33:01 +0200
committerWolfram Sang <wsa@the-dreams.de>2020-04-18 23:37:38 +0200
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parent1a351b10b9671fc2fac767c40a1c4373b9bf5092 (diff)
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dt-bindings: i2c: Add binding for Qualcomm CCI I2C controller
Add DT binding document for Qualcomm Camera Control Interface (CCI) I2C controller. Signed-off-by: Todor Tomov <todor.tomov@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Robert Foss <robert.foss@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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+Qualcomm Camera Control Interface (CCI) I2C controller
+
+PROPERTIES:
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be one of:
+ "qcom,msm8916-cci"
+ "qcom,msm8996-cci"
+ "qcom,sdm845-cci"
+
+- reg
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: base address CCI I2C controller and length of memory
+ mapped region.
+
+- interrupts:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: specifies the CCI I2C interrupt. The format of the
+ specifier is defined by the binding document describing
+ the node's interrupt parent.
+
+- clocks:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: a list of phandle, should contain an entry for each
+ entries in clock-names.
+
+- clock-names
+ Usage: required
+ Value type: <string>
+ Definition: a list of clock names, must include "cci" clock.
+
+- power-domains
+ Usage: required for "qcom,msm8996-cci"
+ Value type: <prop-encoded-array>
+ Definition:
+
+SUBNODES:
+
+The CCI provides I2C masters for one (msm8916) or two i2c busses (msm8996 and
+sdm845), described as subdevices named "i2c-bus@0" and "i2c-bus@1".
+
+PROPERTIES:
+
+- reg:
+ Usage: required
+ Value type: <u32>
+ Definition: Index of the CCI bus/master
+
+- clock-frequency:
+ Usage: optional
+ Value type: <u32>
+ Definition: Desired I2C bus clock frequency in Hz, defaults to 100
+ kHz if omitted.
+
+Example:
+
+ cci@a0c000 {
+ compatible = "qcom,msm8996-cci";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xa0c000 0x1000>;
+ interrupts = <GIC_SPI 295 IRQ_TYPE_EDGE_RISING>;
+ clocks = <&mmcc MMSS_MMAGIC_AHB_CLK>,
+ <&mmcc CAMSS_TOP_AHB_CLK>,
+ <&mmcc CAMSS_CCI_AHB_CLK>,
+ <&mmcc CAMSS_CCI_CLK>,
+ <&mmcc CAMSS_AHB_CLK>;
+ clock-names = "mmss_mmagic_ahb",
+ "camss_top_ahb",
+ "cci_ahb",
+ "cci",
+ "camss_ahb";
+
+ i2c-bus@0 {
+ reg = <0>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
+ i2c-bus@1 {
+ reg = <1>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+ };