linux-kernel - [PATCH 2/3] dt-bindings: pinctrl: rockchip: Add io domain properties

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Message-Id: <20230904115816.1237684-3-s.hauer@pengutronix.de>
Date:   Mon,  4 Sep 2023 13:58:15 +0200
From:   Sascha Hauer <s.hauer@...gutronix.de>
To:     linux-rockchip@...ts.infradead.org
Cc:     Heiko Stuebner <heiko@...ech.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-gpio@...r.kernel.org,
        kernel@...gutronix.de,
        Quentin Schulz <quentin.schulz@...obroma-systems.com>,
        Michael Riesch <michael.riesch@...fvision.net>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 2/3] dt-bindings: pinctrl: rockchip: Add io domain properties

Add rockchip,io-domains property to the Rockchip pinctrl driver. This
list of phandles points to the IO domain device(s) the pins of the
pinctrl driver are supplied from.

Also a rockchip,io-domain-boot-on property is added to pin groups
which can be used for pin groups which themselves are needed to access
the regulators an IO domain is driven from.

Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
 .../bindings/pinctrl/rockchip,pinctrl.yaml          | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml
index 10c335efe619e..92075419d29cf 100644
--- a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml
@@ -62,6 +62,11 @@ properties:
       Required for at least rk3188 and rk3288. On the rk3368 this should
       point to the PMUGRF syscon.
 
+  rockchip,io-domains:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      Phandles to io domains
+
   "#address-cells":
     enum: [1, 2]
 
@@ -137,7 +142,13 @@ additionalProperties:
             - description:
                 The phandle of a node contains the generic pinconfig options
                 to use as described in pinctrl-bindings.txt.
-
+      rockchip,io-domain-boot-on:
+        type: boolean
+        description:
+          If true assume that the io domain needed for this pin group has been
+          configured correctly by the bootloader. This is needed to break cyclic
+          dependencies introduced when a io domain needs a regulator that can be
+          accessed through pins configured here.
 examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
-- 
2.39.2