From: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
Document DT bindings used to describe the Qualcomm QPNP PMICs.
Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
Signed-off-by: Stanimir Varbanov <svarbanov@xxxxxxxxxx>
---
.../devicetree/bindings/qpnp/qcom,qpnp-spmi.txt | 53 ++++++++++++++++++++
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+Qualcomm QPNP partitioned PMIC multi-function device bindings
+
+QPNP is effectively a partitioning scheme for dividing the SPMI extended
+register space up into logical pieces, and set of fixed register
+locations/definitions within these regions, with some of these regions
+specifically used for interrupt handling.
+
+The QPNP PMICs are used with the Qualcomm Snapdragon series SoCs, and are
+interfaced to the chip via the SPMI (System Power Management Interface) bus.
+Support for multiple independent functions are implemented by splitting the
+16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes
+each. A function can consume one or more of these fixed-size register regions.
+
+Required properties:
+- compatible: Should contain "qcom,qpnp-spmi"
+- reg: Specifies the SPMI USID slave address for this device.
+ For more information see:
+ Documentation/devicetree/bindings/spmi/spmi.txt
+- #address-cells: Defines address cells for peripheral nodes - should be 1
+- #size-cells: Defines size cells for peripheral nodes - should be 0
+
+Required properties for peripheral child nodes:
+- compatible: Should constain "qcom,qpnp-xxx"
+- reg: One or more 16bits peripheral address(es)
+
+Optional properties for peripheral child nodes:
+- reg-names: Shall be a string describing the reg resource.
+- interrupts: Interrupts are specified as a 4-tuple. For more information
+ see:
+ Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
+- interrupt-names: Corresponding interrupt name to the interrupts property
+
+Each child node represents a function of the QPNP. Each child 'reg' entry
+describes a QPNP peripheral address within the USID slave address space where
+the region starts.
+
+Example:
+
+ pm8941@0 {
+ compatible = "qcom,qpnp-spmi";
+ reg = <0x0 SPMI_USID>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rtc@6000 {
+ compatible = "qcom,qpnp-rtc";
+ reg = <0x6000 0x6100>;
+ reg-names = "rtc", "alarm";
+ interrupts = <0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
+ };
+ };
+
--
1.7.0.4
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