[RFC 05/11] dt-bindings: soc: realtek: rtd1195-chip: Extend reg property
From: Andreas Färber <afaerber@suse.de>
Date: 2019-11-03 01:36:59
Also in:
linux-devicetree, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Allow to optionally specify a second register to identify the chip. Whether needed and which register to specify depends on the family; RTD1295 family will want the CHIP_INFO1 register. Signed-off-by: Andreas Färber <afaerber@suse.de> --- A SoC specific binding would defeat the purpose of the generic Linux driver; is it possible to check the root node's compatible in an if: expression to prohibit using more than one reg on "realtek,rtd1195"? .../devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml b/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml
index 565ad2419553..e431cf559b66 100644
--- a/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml
+++ b/Documentation/devicetree/bindings/soc/realtek/realtek,rtd1195-chip.yaml@@ -11,13 +11,15 @@ maintainers: description: | The Realtek SoCs have some registers to identify the chip and revision. + To identify the exact model within a family, further registers are needed. properties: compatible: const: "realtek,rtd1195-chip" reg: - maxItems: 1 + minItems: 1 + maxItems: 2 required: - compatible
@@ -29,4 +31,10 @@ examples: compatible = "realtek,rtd1195-chip"; reg = <0x1801a200 0x8>; }; + - | + chip-info@9801a200 { + compatible = "realtek,rtd1195-chip"; + reg = <0x9801a200 0x8>, + <0x98007028 0x4>; + }; ...
--
2.16.4
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