new file mode 100644
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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/sprd,sc9860-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Spreadtrum SC9860 DMA controller
+
+description: |
+ There are three DMA controllers: AP DMA, AON DMA and AGCP DMA. For AGCP
+ DMA controller, it can or do not request the IRQ, which will save
+ system power without resuming system by DMA interrupts if AGCP DMA
+ does not request the IRQ.
+
+maintainers:
+ - Orson Zhai <orsonzhai@gmail.com>
+ - Baolin Wang <baolin.wang7@gmail.com>
+ - Chunyan Zhang <zhang.lyra@gmail.com>
+
+properties:
+ compatible:
+ const: sprd,sc9860-dma
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ minItems: 1
+ items:
+ - description: DMA enable clock
+ - description: optional ashb_eb clock, only for the AGCP DMA controller
+
+ clock-names:
+ minItems: 1
+ items:
+ - const: enable
+ - const: ashb_eb
+
+ '#dma-cells':
+ const: 1
+
+ dma-channels:
+ const: 32
+
+ '#dma-channels':
+ const: 32
+ deprecated: true
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - '#dma-cells'
+ - dma-channels
+
+allOf:
+ - $ref: dma-controller.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/sprd,sc9860-clk.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ /* AP DMA controller */
+ dma-controller@20100000 {
+ compatible = "sprd,sc9860-dma";
+ reg = <0x20100000 0x4000>;
+ interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&apahb_gate CLK_DMA_EB>;
+ clock-names = "enable";
+ #dma-cells = <1>;
+ dma-channels = <32>;
+ };
+
+ /* AGCP DMA controller */
+ dma-controller@41580000 {
+ compatible = "sprd,sc9860-dma";
+ reg = <0x41580000 0x4000>;
+ clocks = <&agcp_gate CLK_AGCP_DMAAP_EB>,
+ <&agcp_gate CLK_AGCP_AP_ASHB_EB>;
+ clock-names = "enable", "ashb_eb";
+ #dma-cells = <1>;
+ dma-channels = <32>;
+ };
+...
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-* Spreadtrum DMA controller
-
-This binding follows the generic DMA bindings defined in dma.txt.
-
-Required properties:
-- compatible: Should be "sprd,sc9860-dma".
-- reg: Should contain DMA registers location and length.
-- interrupts: Should contain one interrupt shared by all channel.
-- #dma-cells: must be <1>. Used to represent the number of integer
- cells in the dmas property of client device.
-- dma-channels : Number of DMA channels supported. Should be 32.
-- clock-names: Should contain the clock of the DMA controller.
-- clocks: Should contain a clock specifier for each entry in clock-names.
-
-Deprecated properties:
-- #dma-channels : Number of DMA channels supported. Should be 32.
-
-Example:
-
-Controller:
-apdma: dma-controller@20100000 {
- compatible = "sprd,sc9860-dma";
- reg = <0x20100000 0x4000>;
- interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
- #dma-cells = <1>;
- dma-channels = <32>;
- clock-names = "enable";
- clocks = <&clk_ap_ahb_gates 5>;
-};
-
-
-Client:
-DMA clients connected to the Spreadtrum DMA controller must use the format
-described in the dma.txt file, using a two-cell specifier for each channel.
-The two cells in order are:
-1. A phandle pointing to the DMA controller.
-2. The slave id.
-
-spi0: spi@70a00000{
- ...
- dma-names = "rx_chn", "tx_chn";
- dmas = <&apdma 11>, <&apdma 12>;
- ...
-};
Convert the Spreadtrum SC9860 DMA bindings to DT schema. Changes during conversion: - rename file to match compatible - make interrupts optional, the AGCP DMA controller doesn't need it - describe the optional ashb_eb clock for the AGCP DMA controller Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com> --- Changes in V2: - rework clocks, clock-names (Conor) .../bindings/dma/sprd,sc9860-dma.yaml | 92 +++++++++++++++++++ .../devicetree/bindings/dma/sprd-dma.txt | 44 --------- 2 files changed, 92 insertions(+), 44 deletions(-) create mode 100644 Documentation/devicetree/bindings/dma/sprd,sc9860-dma.yaml delete mode 100644 Documentation/devicetree/bindings/dma/sprd-dma.txt