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Message-Id: <20201112084953.21629-2-jee.heng.sia@intel.com>
Date: Thu, 12 Nov 2020 16:49:39 +0800
From: Sia Jee Heng <jee.heng.sia@...el.com>
To: vkoul@...nel.org, Eugeniy.Paltsev@...opsys.com, robh+dt@...nel.org
Cc: andriy.shevchenko@...ux.intel.com, dmaengine@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH v3 01/15] dt-bindings: dma: Add YAML schemas for dw-axi-dmac
YAML schemas Device Tree (DT) binding is the new format for DT to replace
the old format. Introduce YAML schemas DT binding for dw-axi-dmac and
remove the old version.
Signed-off-by: Sia Jee Heng <jee.heng.sia@...el.com>
---
.../bindings/dma/snps,dw-axi-dmac.txt | 39 ------
.../bindings/dma/snps,dw-axi-dmac.yaml | 126 ++++++++++++++++++
2 files changed, 126 insertions(+), 39 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt
create mode 100644 Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt
deleted file mode 100644
index dbe160400adc..000000000000
--- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt
+++ /dev/null
@@ -1,39 +0,0 @@
-Synopsys DesignWare AXI DMA Controller
-
-Required properties:
-- compatible: "snps,axi-dma-1.01a"
-- reg: Address range of the DMAC registers. This should include
- all of the per-channel registers.
-- interrupt: Should contain the DMAC interrupt number.
-- dma-channels: Number of channels supported by hardware.
-- snps,dma-masters: Number of AXI masters supported by the hardware.
-- snps,data-width: Maximum AXI data width supported by hardware.
- (0 - 8bits, 1 - 16bits, 2 - 32bits, ..., 6 - 512bits)
-- snps,priority: Priority of channel. Array size is equal to the number of
- dma-channels. Priority value must be programmed within [0:dma-channels-1]
- range. (0 - minimum priority)
-- snps,block-size: Maximum block size supported by the controller channel.
- Array size is equal to the number of dma-channels.
-
-Optional properties:
-- snps,axi-max-burst-len: Restrict master AXI burst length by value specified
- in this property. If this property is missing the maximum AXI burst length
- supported by DMAC is used. [1:256]
-
-Example:
-
-dmac: dma-controller@...00 {
- compatible = "snps,axi-dma-1.01a";
- reg = <0x80000 0x400>;
- clocks = <&core_clk>, <&cfgr_clk>;
- clock-names = "core-clk", "cfgr-clk";
- interrupt-parent = <&intc>;
- interrupts = <27>;
-
- dma-channels = <4>;
- snps,dma-masters = <2>;
- snps,data-width = <3>;
- snps,block-size = <4096 4096 4096 4096>;
- snps,priority = <0 1 2 3>;
- snps,axi-max-burst-len = <16>;
-};
diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
new file mode 100644
index 000000000000..481ef0dacf5f
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
@@ -0,0 +1,126 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/snps,dw-axi-dmac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys DesignWare AXI DMA Controller
+
+maintainers:
+ - Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com
+
+description: |
+ Synopsys DesignWare AXI DMA Controller DT Binding
+
+properties:
+ compatible:
+ enum:
+ - snps,axi-dma-1.01a
+
+ reg:
+ items:
+ - description: Address range of the DMAC registers.
+
+ reg-names:
+ items:
+ - const: axidma_ctrl_regs
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: Bus Clock
+ - description: Module Clock
+
+ clock-names:
+ items:
+ - const: core-clk
+ - const: cfgr-clk
+
+ '#dma-cells':
+ const: 1
+
+ dma-channels:
+ description: |
+ Number of channels supported by hardware.
+
+ snps,dma-masters:
+ description: |
+ Number of AXI masters supported by the hardware.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - enum: [1, 2]
+ default: 2
+
+ snps,data-width:
+ description: |
+ AXI data width supported by hardware.
+ (0 - 8bits, 1 - 16bits, 2 - 32bits, ..., 6 - 512bits)
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - enum: [0, 1, 2, 3, 4, 5, 6]
+ default: 4
+
+ snps,priority:
+ description: |
+ Channel priority specifier associated with the DMA channels.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32-array
+ - minItems: 1
+ maxItems: 8
+ default: [0, 1, 2, 3]
+
+ snps,block-size:
+ description: |
+ Channel block size specifier associated with the DMA channels.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32-array
+ - minItems: 1
+ maxItems: 8
+ default: [4096, 4096, 4096, 4096]
+
+ snps,axi-max-burst-len:
+ description: |
+ Restrict master AXI burst length by value specified in this property.
+ If this property is missing the maximum AXI burst length supported by
+ DMAC is used. [1:256]
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ default: 16
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - interrupts
+ - '#dma-cells'
+ - dma-channels
+ - snps,dma-masters
+ - snps,data-width
+ - snps,priority
+ - snps,block-size
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ /* example with snps,dw-axi-dmac */
+ dmac: dma-controller@...00 {
+ compatible = "snps,axi-dma-1.01a";
+ reg = <0x80000 0x400>;
+ clocks = <&core_clk>, <&cfgr_clk>;
+ clock-names = "core-clk", "cfgr-clk";
+ interrupt-parent = <&intc>;
+ interrupts = <27>;
+ #dma-cells = <1>;
+ dma-channels = <4>;
+ snps,dma-masters = <2>;
+ snps,data-width = <3>;
+ snps,block-size = <4096 4096 4096 4096>;
+ snps,priority = <0 1 2 3>;
+ snps,axi-max-burst-len = <16>;
+ };
--
2.18.0
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