linux-kernel - [PATCH v4 06/28] dt-bindings: net: Add support for QMC HDLC

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Message-ID: <817d1418fa1e9e689375177bee4bdc68ceeab7be.1692376361.git.christophe.leroy@csgroup.eu>
Date:   Fri, 18 Aug 2023 18:39:00 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Herve Codina <herve.codina@...tlin.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Shengjiu Wang <shengjiu.wang@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     netdev@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        alsa-devel@...a-project.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH v4 06/28] dt-bindings: net: Add support for QMC HDLC

From: Herve Codina <herve.codina@...tlin.com>

The QMC (QUICC mutichannel controller) is a controller present in some
PowerQUICC SoC such as MPC885.
The QMC HDLC uses the QMC controller to transfer HDLC data.

Additionally, a framer can be connected to the QMC HDLC.
If present, this framer is the interface between the TDM bus used by the
QMC HDLC and the E1/T1 line.
The QMC HDLC can use this framer to get information about the E1/T1 line
and configure the E1/T1 line.

Signed-off-by: Herve Codina <herve.codina@...tlin.com>
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 .../devicetree/bindings/net/fsl,qmc-hdlc.yaml | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/fsl,qmc-hdlc.yaml

diff --git a/Documentation/devicetree/bindings/net/fsl,qmc-hdlc.yaml b/Documentation/devicetree/bindings/net/fsl,qmc-hdlc.yaml
new file mode 100644
index 000000000000..13f3572f0feb
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/fsl,qmc-hdlc.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/fsl,qmc-hdlc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale/NXP QUICC Multichannel Controller (QMC) HDLC
+
+maintainers:
+  - Herve Codina <herve.codina@...tlin.com>
+
+description: |
+  The QMC HDLC uses a QMC (QUICC Multichannel Controller) channel to transfer
+  HDLC data.
+
+properties:
+  compatible:
+    const: fsl,qmc-hdlc
+
+  fsl,qmc-chan:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle to QMC node
+          - description: Channel number
+    description:
+      Should be a phandle/number pair. The phandle to QMC node and the QMC
+      channel to use.
+
+  framer:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to the framer node
+
+required:
+  - compatible
+  - fsl,qmc-chan
+
+additionalProperties: false
+
+examples:
+  - |
+    hdlc {
+        compatible = "fsl,qmc-hdlc";
+        fsl,qmc-chan = <&qmc 16>;
+    };
-- 
2.41.0