linux-kernel - [PATCH 1/2] dt-bindings: reset: document Broadcom's BCM4908 PCIe reset binding

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Message-Id: <20201127111442.1096-1-zajec5@gmail.com>
Date:   Fri, 27 Nov 2020 12:14:41 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH 1/2] dt-bindings: reset: document Broadcom's BCM4908 PCIe reset binding

From: Rafał Miłecki <rafal@...ecki.pl>

BCM4908 was built using older PCIe hardware block that requires using
external reset block controlling PERST# signals.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 .../reset/brcm,bcm4908-misc-pcie-reset.yaml   | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/brcm,bcm4908-misc-pcie-reset.yaml

diff --git a/Documentation/devicetree/bindings/reset/brcm,bcm4908-misc-pcie-reset.yaml b/Documentation/devicetree/bindings/reset/brcm,bcm4908-misc-pcie-reset.yaml
new file mode 100644
index 000000000000..88aebb370838
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/brcm,bcm4908-misc-pcie-reset.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/brcm,bcm4908-misc-pcie-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom MISC block PCIe reset controller
+
+description: This document describes reset controller handling PCIe PERST#
+  signals. On BCM4908 it's a part of the MISC block.
+
+maintainers:
+  - Rafał Miłecki <rafal@...ecki.pl>
+
+properties:
+  compatible:
+    const: brcm,bcm4908-misc-pcie-reset
+
+  reg:
+    maxItems: 1
+
+  "#reset-cells":
+    description: PCIe core id
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    reset-controller@...02644 {
+        compatible = "brcm,bcm4908-misc-pcie-reset";
+        reg = <0xff802644 0x04>;
+        #reset-cells = <1>;
+    };
-- 
2.26.2