Convert the Renesas DDR Bus Controller Device Tree binding documentation
to json-schema.
Drop referrals to driver behavior.
Make power-domains required, as it is present for all current users.
Update the example to match reality.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
.../memory-controllers/renesas,dbsc.txt | 44 ---------------
.../memory-controllers/renesas,dbsc.yaml | 56 +++++++++++++++++++
2 files changed, 56 insertions(+), 44 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.txt
create mode 100644 Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.yaml
diff --git a/Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.txt b/Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.txt
deleted file mode 100644
index 9f78e6c82740cc89..0000000000000000
--- a/Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-DT bindings for Renesas R-Mobile and SH-Mobile memory controllers
-=================================================================
-
-Renesas R-Mobile and SH-Mobile SoCs contain one or more memory controllers.
-These memory controllers differ from one SoC variant to another, and are called
-by different names ("DDR Bus Controller (DBSC)", "DDR3 Bus State Controller
-(DBSC3)", "SDRAM Bus State Controller (SBSC)").
-
-Currently memory controller device nodes are used only to reference PM
-domains, and prevent these PM domains from being powered down, which would
-crash the system.
-
-As there exist no actual drivers for these controllers yet, these bindings
-should be considered EXPERIMENTAL for now.
-
-Required properties:
- - compatible: Must be one of the following SoC-specific values:
- - "renesas,dbsc-r8a73a4" (R-Mobile APE6)
- - "renesas,dbsc3-r8a7740" (R-Mobile A1)
- - "renesas,sbsc-sh73a0" (SH-Mobile AG5)
- - reg: Must contain the base address and length of the memory controller's
- registers.
-
-Optional properties:
- - interrupts: Must contain a list of interrupt specifiers for memory
- controller interrupts, if available.
- - interrupt-names: Must contain a list of interrupt names corresponding to
- the interrupts in the interrupts property, if available.
- Valid interrupt names are:
- - "sec" (secure interrupt)
- - "temp" (normal (temperature) interrupt)
- - power-domains: Must contain a reference to the PM domain that the memory
- controller belongs to, if available.
-
-Example:
-
- sbsc1: memory-controller@fe400000 {
- compatible = "renesas,sbsc-sh73a0";
- reg = <0xfe400000 0x400>;
- interrupts = <0 35 IRQ_TYPE_LEVEL_HIGH>,
- <0 36 IRQ_TYPE_LEVEL_HIGH>;
- interrupt-names = "sec", "temp";
- power-domains = <&pd_a4bc0>;
- };
diff --git a/Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.yaml b/Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.yaml
new file mode 100644
index 0000000000000000..7056ccb7eb304cce
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/renesas,dbsc.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/memory-controllers/renesas,dbsc.yaml#";
+$schema: "http://devicetree.org/meta-schemas/core.yaml#";
+
+title: Renesas DDR Bus Controllers
+
+maintainers:
+ - Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
+
+description: |
+ Renesas SoCs contain one or more memory controllers. These memory
+ controllers differ from one SoC variant to another, and are called by
+ different names, e.g. "DDR Bus Controller (DBSC)", "DDR3 Bus State Controller
+ (DBSC3)", or "SDRAM Bus State Controller (SBSC)").
+
+properties:
+ compatible:
+ enum:
+ - renesas,dbsc-r8a73a4 # R-Mobile APE6
+ - renesas,dbsc3-r8a7740 # R-Mobile A1
+ - renesas,sbsc-sh73a0 # SH-Mobile AG5
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 2
+
+ interrupt-names:
+ items:
+ - const: sec # secure interrupt
+ - const: temp # normal (temperature) interrupt
+
+ power-domains:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - power-domains
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ sbsc1: memory-controller@fe400000 {
+ compatible = "renesas,sbsc-sh73a0";
+ reg = <0xfe400000 0x400>;
+ interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "sec", "temp";
+ power-domains = <&pd_a4bc0>;
+ };
--
2.17.1
