65 lines
2.3 KiB
Plaintext
65 lines
2.3 KiB
Plaintext
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Qualcomm SPMI PMICs multi-function device bindings
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The Qualcomm SPMI series presently includes PM8941, PM8841 and PMA8084
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PMICs. These PMICs use a QPNP scheme through SPMI interface.
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QPNP is effectively a partitioning scheme for dividing the SPMI extended
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register space up into logical pieces, and set of fixed register
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locations/definitions within these regions, with some of these regions
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specifically used for interrupt handling.
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The QPNP PMICs are used with the Qualcomm Snapdragon series SoCs, and are
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interfaced to the chip via the SPMI (System Power Management Interface) bus.
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Support for multiple independent functions are implemented by splitting the
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16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes
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each. A function can consume one or more of these fixed-size register regions.
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Required properties:
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- compatible: Should contain one of:
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"qcom,pm8941"
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"qcom,pm8841"
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"qcom,pma8084"
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or generalized "qcom,spmi-pmic".
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- reg: Specifies the SPMI USID slave address for this device.
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For more information see:
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Documentation/devicetree/bindings/spmi/spmi.txt
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Required properties for peripheral child nodes:
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- compatible: Should contain "qcom,xxx", where "xxx" is a peripheral name.
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Optional properties for peripheral child nodes:
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- interrupts: Interrupts are specified as a 4-tuple. For more information
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see:
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Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
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- interrupt-names: Corresponding interrupt name to the interrupts property
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Each child node of SPMI slave id represents a function of the PMIC. In the
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example below the rtc device node represents a peripheral of pm8941
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SID = 0. The regulator device node represents a peripheral of pm8941 SID = 1.
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Example:
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spmi {
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compatible = "qcom,spmi-pmic-arb";
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pm8941@0 {
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compatible = "qcom,pm8941", "qcom,spmi-pmic";
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reg = <0x0 SPMI_USID>;
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rtc {
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compatible = "qcom,rtc";
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interrupts = <0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
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interrupt-names = "alarm";
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};
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};
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pm8941@1 {
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compatible = "qcom,pm8941", "qcom,spmi-pmic";
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reg = <0x1 SPMI_USID>;
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regulator {
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compatible = "qcom,regulator";
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regulator-name = "8941_boost";
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};
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};
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};
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