linux-kernel - [PATCH] dt-bindings: firmware: add reset-controller property

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Date:   Sun, 9 Jul 2023 22:55:42 +0530
From:   Piyush Mehta <piyush.mehta@....com>
To:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <dlemoal@...nel.org>,
        <michal.simek@....com>, <broonie@...nel.org>,
        <sebastian.reichel@...labora.com>, <wsa@...nel.org>,
        <nava.kishore.manne@....com>
CC:     <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <git@....com>,
        Piyush Mehta <piyush.mehta@....com>
Subject: [PATCH] dt-bindings: firmware: add reset-controller property

The reset controller is responsible for managing both device-level resets
and individual PMC (Power Management Controller) block resets.

To facilitate this functionality reset-controller property is added to the
firmware device tree binding.

Signed-off-by: Piyush Mehta <piyush.mehta@....com>
---
 .../firmware/xilinx/xlnx,zynqmp-firmware.yaml         | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml
index 910bebe6cfa8..c3a7a5a61d02 100644
--- a/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml
+++ b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml
@@ -59,6 +59,12 @@ properties:
       controller.
     type: object
 
+  reset-controller:
+    $ref: /schemas/reset/xlnx,zynqmp-reset.yaml#
+    description: The reset-controller has the ability to reset lines connected
+      to different blocks and peripherals in the SoC.
+    type: object
+
 required:
   - compatible
 
@@ -84,6 +90,11 @@ examples:
         clocks = <&ref>, <&alt_ref>, <&pl_alt_ref>;
         clock-names = "ref", "alt_ref", "pl_alt_ref";
       };
+
+      zynqmp_reset: reset-controller {
+        compatible = "xlnx,zynqmp-reset";
+        #reset-cells = <1>;
+      };
     };
 
 ...
-- 
2.25.1