linux-kernel - [PATCH v2 1/9] dt-bindings: reset: Add a binding for the RPi Firmware reset controller

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Date:   Tue,  9 Jun 2020 19:49:54 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     f.fainelli@...il.com, gregkh@...uxfoundation.org, wahrenst@....net,
        p.zabel@...gutronix.de, linux-kernel@...r.kernel.org,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Eric Anholt <eric@...olt.net>
Cc:     linux-usb@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, tim.gover@...pberrypi.org,
        linux-pci@...r.kernel.org, helgaas@...nel.org,
        andy.shevchenko@...il.com, mathias.nyman@...ux.intel.com,
        lorenzo.pieralisi@....com, Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org
Subject: [PATCH v2 1/9] dt-bindings: reset: Add a binding for the RPi Firmware reset controller

The firmware running on the RPi VideoCore can be used to reset and
initialize HW controlled by the firmware.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>

---

Changes since v1:
 - Correct cells binding as per Florian's comment
 - Change compatible string to be more generic

 .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
index b48ed875eb8e..23a885af3a28 100644
--- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
+++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
@@ -39,6 +39,22 @@ properties:
       - compatible
       - "#clock-cells"
 
+  reset:
+    type: object
+
+    properties:
+      compatible:
+        const: raspberrypi,firmware-reset
+
+      "#reset-cells":
+        const: 1
+        description: >
+          The argument is the ID of the firmware reset line to affect.
+
+    required:
+      - compatible
+      - "#reset-cells"
+
     additionalProperties: false
 
 required:
@@ -55,5 +71,10 @@ examples:
             compatible = "raspberrypi,firmware-clocks";
             #clock-cells = <1>;
         };
+
+        reset: reset {
+            compatible = "raspberrypi,firmware-reset";
+            #reset-cells = <1>;
+        };
     };
 ...
-- 
2.26.2