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Subject[PATCH v2 05/29] dt-bindings: soc: realtek: rtd1195-chip: Add iso-syscon property
Date
Allow to optionally specify a phandle to iso syscon to identify the chip.
RTD1295 family will want to check the ISO_CHIP_INFO1 register.

Signed-off-by: Andreas Färber <afaerber@suse.de>
---
A SoC specific binding would defeat the purpose of the generic Linux driver
detecting the SoC based on registers.
Simply allowing it all for SoC families seems the most flexible.

v1 -> v2:
* Instead of extending reg, allow optional iso-syscon property for RTD129x.
Iso syscon currently does not have a compatible, and it may need to differ
across SoC families.

.../bindings/soc/realtek/realtek,rtd1195-chip.yaml | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml b/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml
index 86a1de214782..dfe33c95f68d 100644
--- a/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml
+++ b/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml
@@ -11,6 +11,7 @@ maintainers:

description: |
The Realtek DHC SoCs have some registers to identify the chip and revision.
+ To identify the exact model within a family, further registers are needed.

properties:
compatible:
@@ -19,6 +20,8 @@ properties:
reg:
maxItems: 1

+ iso-syscon: true
+
required:
- compatible
- reg
@@ -31,4 +34,10 @@ examples:
compatible = "realtek,rtd1195-chip";
reg = <0x1801a200 0x8>;
};
+ - |
+ chip-info@9801a200 {
+ compatible = "realtek,rtd1195-chip";
+ reg = <0x9801a200 0x8>;
+ iso-syscon = <&iso>;
+ };
...
--
2.26.2
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