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Diffstat (limited to 'Documentation/devicetree/bindings/spmi')
| -rw-r--r-- | Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt | 65 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/spmi/spmi.yaml | 77 |
2 files changed, 142 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt new file mode 100644 index 000000000..ca645e21f --- /dev/null +++ b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt @@ -0,0 +1,65 @@ +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>; + }; diff --git a/Documentation/devicetree/bindings/spmi/spmi.yaml b/Documentation/devicetree/bindings/spmi/spmi.yaml new file mode 100644 index 000000000..173940930 --- /dev/null +++ b/Documentation/devicetree/bindings/spmi/spmi.yaml @@ -0,0 +1,77 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spmi/spmi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: System Power Management Interface (SPMI) Controller + +maintainers: + - Stephen Boyd <sboyd@kernel.org> + +description: | + The System Power Management (SPMI) controller is a 2-wire bus defined + by the MIPI Alliance for power management control to be used on SoC designs. + + SPMI controllers are modelled in device tree using a generic set of + bindings defined here, plus any bus controller specific properties, if + needed. + + Each SPMI controller has zero or more child nodes (up to 16 ones), each + one representing an unique slave at the bus. + +properties: + $nodename: + pattern: "^spmi@.*" + + reg: + maxItems: 1 + + "#address-cells": + const: 2 + + "#size-cells": + const: 0 + +patternProperties: + "@[0-9a-f]$": + description: up to 16 child PMIC nodes + type: object + + properties: + reg: + minItems: 1 + maxItems: 2 + items: + - minimum: 0 + maximum: 0xf + - enum: [ 0 ] + description: | + 0 means user ID address. 1 is reserved for group ID address. + + required: + - reg + +required: + - reg + +additionalProperties: true + +examples: + - | + #include <dt-bindings/spmi/spmi.h> + + spmi@0 { + reg = <0 0>; + + #address-cells = <2>; + #size-cells = <0>; + + child@0 { + reg = <0 SPMI_USID>; + }; + + child@7 { + reg = <7 SPMI_USID>; + }; + }; |