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Message-Id: <20210428055750.683963-1-clabbe@baylibre.com>
Date: Wed, 28 Apr 2021 05:57:50 +0000
From: Corentin Labbe <clabbe@...libre.com>
To: robh+dt@...nel.org, vkoul@...nel.org
Cc: linus.walleij@...aro.org, devicetree@...r.kernel.org,
dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH RFC] dt-bindings: dma: convert arm-pl08x to yaml
Converts dma/arm-pl08x.txt to yaml.
In the process, I add an example for the faraday variant.
Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
.../devicetree/bindings/dma/arm-pl08x.txt | 59 --------
.../devicetree/bindings/dma/arm-pl08x.yaml | 127 ++++++++++++++++++
2 files changed, 127 insertions(+), 59 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/dma/arm-pl08x.txt
create mode 100644 Documentation/devicetree/bindings/dma/arm-pl08x.yaml
diff --git a/Documentation/devicetree/bindings/dma/arm-pl08x.txt b/Documentation/devicetree/bindings/dma/arm-pl08x.txt
deleted file mode 100644
index 0ba81f79266f..000000000000
--- a/Documentation/devicetree/bindings/dma/arm-pl08x.txt
+++ /dev/null
@@ -1,59 +0,0 @@
-* ARM PrimeCells PL080 and PL081 and derivatives DMA controller
-
-Required properties:
-- compatible: "arm,pl080", "arm,primecell";
- "arm,pl081", "arm,primecell";
- "faraday,ftdmac020", "arm,primecell"
-- arm,primecell-periphid: on the FTDMAC020 the primecell ID is not hard-coded
- in the hardware and must be specified here as <0x0003b080>. This number
- follows the PrimeCell standard numbering using the JEP106 vendor code 0x38
- for Faraday Technology.
-- reg: Address range of the PL08x registers
-- interrupt: The PL08x interrupt number
-- clocks: The clock running the IP core clock
-- clock-names: Must contain "apb_pclk"
-- lli-bus-interface-ahb1: if AHB master 1 is eligible for fetching LLIs
-- lli-bus-interface-ahb2: if AHB master 2 is eligible for fetching LLIs
-- mem-bus-interface-ahb1: if AHB master 1 is eligible for fetching memory contents
-- mem-bus-interface-ahb2: if AHB master 2 is eligible for fetching memory contents
-- #dma-cells: must be <2>. First cell should contain the DMA request,
- second cell should contain either 1 or 2 depending on
- which AHB master that is used.
-
-Optional properties:
-- dma-channels: contains the total number of DMA channels supported by the DMAC
-- dma-requests: contains the total number of DMA requests supported by the DMAC
-- memcpy-burst-size: the size of the bursts for memcpy: 1, 4, 8, 16, 32
- 64, 128 or 256 bytes are legal values
-- memcpy-bus-width: the bus width used for memcpy in bits: 8, 16 or 32 are legal
- values, the Faraday FTDMAC020 can also accept 64 bits
-
-Clients
-Required properties:
-- dmas: List of DMA controller phandle, request channel and AHB master id
-- dma-names: Names of the aforementioned requested channels
-
-Example:
-
-dmac0: dma-controller@...30000 {
- compatible = "arm,pl080", "arm,primecell";
- reg = <0x10130000 0x1000>;
- interrupt-parent = <&vica>;
- interrupts = <15>;
- clocks = <&hclkdma0>;
- clock-names = "apb_pclk";
- lli-bus-interface-ahb1;
- lli-bus-interface-ahb2;
- mem-bus-interface-ahb2;
- memcpy-burst-size = <256>;
- memcpy-bus-width = <32>;
- #dma-cells = <2>;
-};
-
-device@...08000 {
- ...
- dmas = <&dmac0 0 2
- &dmac0 1 2>;
- dma-names = "tx", "rx";
- ...
-};
diff --git a/Documentation/devicetree/bindings/dma/arm-pl08x.yaml b/Documentation/devicetree/bindings/dma/arm-pl08x.yaml
new file mode 100644
index 000000000000..ec2324d881f3
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/arm-pl08x.yaml
@@ -0,0 +1,127 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/arm-pl08x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM PrimeCells PL080 and PL081 and derivatives DMA controller
+
+maintainers:
+ - Vinod Koul <vkoul@...nel.org>
+
+allOf:
+ - $ref: "dma-controller.yaml#"
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - const: "arm,pl080"
+ - const: "arm,primecell"
+ - items:
+ - const: "arm,pl081"
+ - const: "arm,primecell"
+ - items:
+ - const: faraday,ftdma020
+ - const: arm,pl080
+ - const: arm,primecell
+ arm,primecell-periphid:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: on the FTDMAC020 the primecell ID is not hard-coded
+ in the hardware and must be specified here as <0x0003b080>. This number
+ follows the PrimeCell standard numbering using the JEP106 vendor code 0x38
+ for Faraday Technology.
+ reg:
+ minItems: 1
+ description: Address range of the PL08x registers
+ interrupts:
+ minItems: 1
+ description: The PL08x interrupt number
+ clocks:
+ minItems: 1
+ description: The clock running the IP core clock
+ clock-names:
+ const: "apb_pclk"
+ lli-bus-interface-ahb1:
+ type: boolean
+ description: if AHB master 1 is eligible for fetching LLIs
+ lli-bus-interface-ahb2:
+ type: boolean
+ description: if AHB master 2 is eligible for fetching LLIs
+ mem-bus-interface-ahb1:
+ type: boolean
+ description: if AHB master 1 is eligible for fetching memory contents
+ mem-bus-interface-ahb2:
+ type: boolean
+ description: if AHB master 2 is eligible for fetching memory contents
+ "#dma-cells":
+ const: 2
+ description: must be <2>. First cell should contain the DMA request,
+ second cell should contain either 1 or 2 depending on
+ which AHB master that is used.
+
+ memcpy-burst-size:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum:
+ - 1
+ - 4
+ - 8
+ - 16
+ - 32
+ - 64
+ - 128
+ - 256
+ description: the size of the bursts for memcpy
+ memcpy-bus-width:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum:
+ - 8
+ - 16
+ - 32
+ - 64
+ description: |
+ the bus width used for memcpy in bits: 8, 16 or 32 are legal
+ values, the Faraday FTDMAC020 can also accept 64 bits
+
+required:
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+ - "#dma-cells"
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ dmac0: dma-controller@...30000 {
+ compatible = "arm,pl080", "arm,primecell";
+ reg = <0x10130000 0x1000>;
+ interrupt-parent = <&vica>;
+ interrupts = <15>;
+ clocks = <&hclkdma0>;
+ clock-names = "apb_pclk";
+ lli-bus-interface-ahb1;
+ lli-bus-interface-ahb2;
+ mem-bus-interface-ahb2;
+ memcpy-burst-size = <256>;
+ memcpy-bus-width = <32>;
+ #dma-cells = <2>;
+ };
+ - |
+ dma-controller@...00000 {
+ compatible = "faraday,ftdma020", "arm,pl080", "arm,primecell";
+ /* Faraday Technology FTDMAC020 variant */
+ arm,primecell-periphid = <0x0003b080>;
+ reg = <0x67000000 0x1000>;
+ interrupts = <9 IRQ_TYPE_EDGE_RISING>;
+ resets = <&syscon GEMINI_RESET_DMAC>;
+ clocks = <&syscon GEMINI_CLK_AHB>;
+ clock-names = "apb_pclk";
+ /* Bus interface AHB1 (AHB0) is totally tilted */
+ lli-bus-interface-ahb2;
+ mem-bus-interface-ahb2;
+ memcpy-burst-size = <256>;
+ memcpy-bus-width = <32>;
+ #dma-cells = <2>;
+ };
--
2.26.3
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