This patch adds documentation of new optional "samsung,asv-bin"
property in the chipid device node and documents requirement of
"syscon" compatible string. These additions are needed to support
Exynos ASV (Adaptive Supply Voltage) feature.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
---
Depends on patch ("8d0daa4c89c9 dt-bindings: arm: samsung: Convert
Exynos Chipid bindings to json-schema") already applied to Rob's
dt/next.
Changes since v4:
- converted to YAML
Changes since v3:
- none
Changes since v2:
- corrected patch summary line prefix, the patch moved in the
sequence
Changes since v1 (RFC):
- new patch
.../bindings/arm/samsung/exynos-chipid.yaml | 31 +++++++++++++++++--
1 file changed, 28 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.yaml b/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.yaml
index 9c573ad7dc7d..df84d9e9f4c2 100644
--- a/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.yaml
+++ b/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.yaml
@@ -9,17 +9,42 @@ title: Samsung Exynos SoC series Chipid driver
maintainers:
- Krzysztof Kozlowski <krzk@xxxxxxxxxx>
+# Custom select to avoid matching all nodes with 'syscon'
+select:
+ properties:
+ compatible:
+ contains:
+ const: samsung,exynos4210-chipid
+ required:
+ - compatible
+
properties:
compatible:
- items:
- - const: samsung,exynos4210-chipid
+ allOf:
+ - items:
+ - const: samsung,exynos4210-chipid
+ - const: syscon
reg:
maxItems: 1
+ samsung,asv-bin:
+ description:
+ Adaptive Supply Voltage bin selection. This can be used
+ to determine the ASV bin of an SoC if respective information
+ is missing in the CHIPID registers or in the OTP memory.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - enum: [ 0, 1, 2, 3 ]
+
+required:
+ - compatible
+ - reg
+
examples:
- |
chipid@10000000 {
- compatible = "samsung,exynos4210-chipid";
+ compatible = "samsung,exynos4210-chipid", "syscon";
reg = <0x10000000 0x100>;
+ samsung,asv-bin = <2>;
};
--
2.17.1
