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-DT bindings for the Renesas R-Mobile System Controller
-
-== System Controller Node ==
-
-The R-Mobile System Controller provides the following functions:
- - Boot mode management,
- - Reset generation,
- - Power management.
-
-Required properties:
-- compatible: Should be "renesas,sysc-<soctype>", "renesas,sysc-rmobile" as
- fallback.
- Examples with soctypes are:
- - "renesas,sysc-r8a73a4" (R-Mobile APE6)
- - "renesas,sysc-r8a7740" (R-Mobile A1)
- - "renesas,sysc-sh73a0" (SH-Mobile AG5)
-- reg: Two address start and address range blocks for the device:
- - The first block refers to the normally accessible registers,
- - the second block refers to the registers protected by the HPB
- semaphore.
-
-Optional nodes:
-- pm-domains: This node contains a hierarchy of PM domain nodes, which should
- match the Power Area Hierarchy in the Power Domain Specifications section of
- the device's datasheet.
-
-
-== PM Domain Nodes ==
-
-Each of the PM domain nodes represents a PM domain, as documented by the
-generic PM domain bindings in
-Documentation/devicetree/bindings/power/power-domain.yaml.
-
-The nodes should be named by the real power area names, and thus their names
-should be unique.
-
-Required properties:
- - #power-domain-cells: Must be 0.
-
-Optional properties:
-- reg: If the PM domain is not always-on, this property must contain the bit
- index number for the corresponding power area in the various Power
- Control and Status Registers. The parent's node must contain the
- following two properties:
- - #address-cells: Must be 1,
- - #size-cells: Must be 0.
- If the PM domain is always-on, this property must be omitted.
-
-
-Example:
-
-This shows a subset of the r8a7740 PM domain hierarchy, containing the
-C5 "always-on" domain, 2 of its subdomains (A4S and A4SU), and the A3SP domain,
-which is a subdomain of A4S.
-
- sysc: system-controller@e6180000 {
- compatible = "renesas,sysc-r8a7740", "renesas,sysc-rmobile";
- reg = <0xe6180000 0x8000>, <0xe6188000 0x8000>;
-
- pm-domains {
- pd_c5: c5 {
- #address-cells = <1>;
- #size-cells = <0>;
- #power-domain-cells = <0>;
-
- pd_a4s: a4s@10 {
- reg = <10>;
- #address-cells = <1>;
- #size-cells = <0>;
- #power-domain-cells = <0>;
-
- pd_a3sp: a3sp@11 {
- reg = <11>;
- #power-domain-cells = <0>;
- };
- };
-
- pd_a4su: a4su@20 {
- reg = <20>;
- #power-domain-cells = <0>;
- };
- };
- };
- };
-
-
-== PM Domain Consumers ==
-
-Hardware blocks belonging to a PM domain should contain a "power-domains"
-property that is a phandle pointing to the corresponding PM domain node.
-
-Example:
-
- tpu: pwm@e6600000 {
- compatible = "renesas,tpu-r8a7740", "renesas,tpu";
- reg = <0xe6600000 0x100>;
- clocks = <&mstp3_clks R8A7740_CLK_TPU0>;
- power-domains = <&pd_a3sp>;
- #pwm-cells = <3>;
- };