linux-kernel - [PATCH v2 1/2] dt-bindings: dma: add schema for altr,msgdma

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Message-ID: <YIn0kzqO9iSwrHuJ@orolia.com>
Date:   Thu, 29 Apr 2021 01:49:39 +0200
From:   Olivier Dautricourt <olivier.dautricourt@...lia.com>
To:     Rob Herring <robh+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Stefan Roese <sr@...x.de>
Cc:     Olivier Dautricourt <olivier.dautricourt@...lia.com>,
        dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] dt-bindings: dma: add schema for altr,msgdma

- add schema for Altera mSGDMA bindings in devicetree.
- add myself as 'Odd fixes' maintainer for this driver

Signed-off-by: Olivier Dautricourt <olivier.dautricourt@...lia.com>
---

Notes:
    Change in v2:
     - fix reg size in dt example
     - fix dt_binding check warning
     - add list in MAINTAINERS entry

 .../devicetree/bindings/dma/altr,msgdma.yaml  | 62 +++++++++++++++++++
 MAINTAINERS                                   |  7 +++
 2 files changed, 69 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/altr,msgdma.yaml

diff --git a/Documentation/devicetree/bindings/dma/altr,msgdma.yaml b/Documentation/devicetree/bindings/dma/altr,msgdma.yaml
new file mode 100644
index 000000000000..295e46c84bf9
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/altr,msgdma.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/altr,msgdma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Altera mSGDMA IP core
+
+maintainers:
+  - Olivier Dautricourt <olivier.dautricourt@...lia.com>
+
+description: |
+  Altera / Intel modular Scatter-Gather Direct Memory Access (mSGDMA)
+  intellectual property (IP)
+
+allOf:
+  - $ref: "dma-controller.yaml#"
+
+properties:
+  compatible:
+    const: altr,msgdma
+
+  reg:
+    description:
+      csr, desc, resp resgisters
+    maxItems: 3
+    minItems: 3
+
+  reg-names:
+    items:
+      - const: csr
+      - const: desc
+      - const: resp
+
+  interrupts:
+    maxItems: 1
+
+  "#dma-cells":
+    description: |
+      The dma controller discards the argument but one must be specified
+      to keep compatibility with dma-controller schema.
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    msgdma_controller: dma-controller@...00b00 {
+        compatible = "altr,msgdma";
+        reg = <0xff200b00 0x100>, <0xff200c00 0x100>, <0xff200d00 0x100>;
+        reg-names = "csr", "desc", "resp";
+        interrupts = <0 67 IRQ_TYPE_LEVEL_HIGH>;
+        #dma-cells = <1>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 8f4a072f47ae..464af1b210b2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -782,6 +782,13 @@ M:	Ley Foon Tan <ley.foon.tan@...el.com>
 S:	Maintained
 F:	drivers/mailbox/mailbox-altera.c

+ALTERA MSGDMA IP CORE DRIVER
+M:	Olivier Dautricourt <olivier.dautricourt@...lia.com>
+L:	dmaengine@...r.kernel.org
+S:	Odd Fixes
+F:	Documentation/devicetree/bindings/dma/altr,msgdma.yaml
+F:	drivers/dma/altera-msgdma.c
+
 ALTERA PIO DRIVER
 M:	Joyce Ooi <joyce.ooi@...el.com>
 L:	linux-gpio@...r.kernel.org
--
2.31.0.rc2