linux-kernel - [PATCH v5 3/4] dt: bindings: dma: Add DT bindings for HiSilicon Hiedma Controller

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Date:   Thu, 19 Nov 2020 20:01:28 +0000
From:   Dongjiu Geng <gengdongjiu@...wei.com>
To:     <mturquette@...libre.com>, <sboyd@...nel.org>,
        <robh+dt@...nel.org>, <vkoul@...nel.org>,
        <dan.j.williams@...el.com>, <p.zabel@...gutronix.de>,
        <gengdongjiu@...wei.com>, <devicetree@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <dmaengine@...r.kernel.org>
Subject: [PATCH v5 3/4] dt: bindings: dma: Add DT bindings for HiSilicon Hiedma Controller

The Hiedma Controller v310 Provides eight DMA channels, each
channel can be configured for one-way transfer. The data can
be transferred in 8-bit, 16-bit, 32-bit, or 64-bit mode. This
documentation describes DT bindings of this controller.

Signed-off-by: Dongjiu Geng <gengdongjiu@...wei.com>
---
 .../bindings/dma/hisilicon,hiedmacv310.yaml   | 103 ++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/hisilicon,hiedmacv310.yaml

diff --git a/Documentation/devicetree/bindings/dma/hisilicon,hiedmacv310.yaml b/Documentation/devicetree/bindings/dma/hisilicon,hiedmacv310.yaml
new file mode 100644
index 000000000000..fe5c5af4d3e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/hisilicon,hiedmacv310.yaml
@@ -0,0 +1,103 @@
+# SPDX-License-Identifier:  GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/hisilicon,hiedmacv310.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HiSilicon Hiedma Controller v310 Device Tree Bindings
+
+description: |
+  These bindings describe the DMA engine included in the HiSilicon Hiedma
+  Controller v310 Device.
+
+maintainers:
+  - Dongjiu Geng <gengdongjiu@...wei.com>
+
+allOf:
+  - $ref: "dma-controller.yaml#"
+
+properties:
+  "#dma-cells":
+    const: 2
+
+  "#clock-cells":
+    const: 2
+
+  compatible:
+    const: hisilicon,hiedmacv310
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  misc_regmap:
+    description: phandle pointing to the misc controller provider node.
+
+  misc_ctrl_base:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: apb clock
+      - description: axi clock
+
+  clock-names:
+    items:
+      - const: apb_pclk
+      - const: axi_aclk
+
+  resets:
+    description: phandle pointing to the dma reset controller provider node.
+
+  reset-names:
+    items:
+      - const: dma-reset
+
+  dma-requests:
+    maximum: 32
+
+  dma-channels:
+    maximum: 8
+
+
+required:
+  - "#dma-cells"
+  - "#clock-cells"
+  - compatible
+  - misc_regmap
+  - misc_ctrl_base
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+  - dma-requests
+  - dma-channels
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/hi3559av100-clock.h>
+
+    dma: dma-controller@...40000 {
+      compatible = "hisilicon,hiedmacv310";
+      reg = <0x10040000 0x1000>;
+      misc_regmap = <&misc_ctrl>;
+      misc_ctrl_base = <0x144>;
+      interrupts = <0 82 4>;
+      clocks = <&clock HI3559AV100_EDMAC1_CLK>, <&clock HI3559AV100_EDMAC1_AXICLK>;
+      clock-names = "apb_pclk", "axi_aclk";
+      #clock-cells = <2>;
+      resets = <&clock 0x16c 7>;
+      reset-names = "dma-reset";
+      dma-requests = <32>;
+      dma-channels = <8>;
+      #dma-cells = <2>;
+    };
+
+...
-- 
2.17.1