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Qualcomm SPMI Controller (PMIC Arbiter)
The SPMI PMIC Arbiter is found on Snapdragon chipsets. It is an SPMI
controller with wrapping arbitration logic to allow for multiple on-chip
devices to control a single SPMI master.
The PMIC Arbiter can also act as an interrupt controller, providing interrupts
to slave devices.
See Documentation/devicetree/bindings/spmi/spmi.yaml for the generic SPMI
controller binding requirements for child nodes.
See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt for
generic interrupt controller binding documentation.
Required properties:
- compatible : should be "qcom,spmi-pmic-arb".
- reg-names : must contain:
"core" - core registers
"intr" - interrupt controller registers
"cnfg" - configuration registers
Registers used only for V2 PMIC Arbiter:
"chnls" - tx-channel per virtual slave registers.
"obsrvr" - rx-channel (called observer) per virtual slave registers.
- reg : address + size pairs describing the PMIC arb register sets; order must
correspond with the order of entries in reg-names
- #address-cells : must be set to 2
- #size-cells : must be set to 0
- qcom,ee : indicates the active Execution Environment identifier (0-5)
- qcom,channel : which of the PMIC Arb provided channels to use for accesses (0-5)
- interrupts : interrupt list for the PMIC Arb controller, must contain a
single interrupt entry for the peripheral interrupt
- interrupt-names : corresponding interrupt names for the interrupts
listed in the 'interrupts' property, must contain:
"periph_irq" - summary interrupt for PMIC peripherals
- interrupt-controller : boolean indicator that the PMIC arbiter is an interrupt controller
- #interrupt-cells : must be set to 4. Interrupts are specified as a 4-tuple:
cell 1: slave ID for the requested interrupt (0-15)
cell 2: peripheral ID for requested interrupt (0-255)
cell 3: the requested peripheral interrupt (0-7)
cell 4: interrupt flags indicating level-sense information, as defined in
dt-bindings/interrupt-controller/irq.h
Example:
spmi {
compatible = "qcom,spmi-pmic-arb";
reg-names = "core", "intr", "cnfg";
reg = <0xfc4cf000 0x1000>,
<0xfc4cb000 0x1000>,
<0xfc4ca000 0x1000>;
interrupt-names = "periph_irq";
interrupts = <0 190 0>;
qcom,ee = <0>;
qcom,channel = <0>;
#address-cells = <2>;
#size-cells = <0>;
interrupt-controller;
#interrupt-cells = <4>;
};
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