linux-kernel - [PATCH v4 2/7] dt-bindings: gpio: rockchip,gpio-bank: add unique hardware GPIO ID

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Message-ID: <774d712d-bcdf-677a-2d9c-a49ed829e965@gmail.com>
Date:   Thu, 23 Feb 2023 20:46:24 +0100
From:   Johan Jonker <jbx6244@...il.com>
To:     linus.walleij@...aro.org, brgl@...ev.pl
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        heiko@...ech.de, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 2/7] dt-bindings: gpio: rockchip,gpio-bank: add unique
 hardware GPIO ID

Add a unique hardware GPIO ID to the Rockchip GPIO nodes with
the "rockchip,gpio-controller" property to be independent from aliases
and probe order. "gpio-ranges" can't be used for that, because there is
no semantic restrictions on how they are set up.

Signed-off-by: Johan Jonker <jbx6244@...il.com>
---

See discussion:
https://lore.kernel.org/u-boot/CACRpkdZx8EaSFLeh4vruRsdC+Sx_ieBiKmuE7t37zhiYqtS3WQ@mail.gmail.com/
---
 .../devicetree/bindings/gpio/rockchip,gpio-bank.yaml        | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
index 2e9a5179c..39ac41e9d 100644
--- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
+++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
@@ -52,6 +52,12 @@ properties:

   gpio-line-names: true

+  rockchip,gpio-controller:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 8
+    description:
+      Unique hardware GPIO ID.
+
   "#gpio-cells":
     const: 2

--
2.20.1