From d2c9d354802abfdb9585ec00ddcf9c50c7fb5e12 Mon Sep 17 00:00:00 2001 From: Charan Pedumuru Date: Wed, 7 May 2025 04:57:34 +0000 Subject: [PATCH] dt-bindings: dma: nvidia,tegra20-apbdma: convert text based binding to json schema Update text binding to YAML. Changes during conversion: - Add a fallback for "nvidia,tegra30-apbdma" as it is compatible with the IP core on "nvidia,tegra20-apbdma". - Update examples and include appropriate file directives to resolve errors identified by `dt_binding_check` and `dtbs_check`. Signed-off-by: Charan Pedumuru Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250507-nvidea-dma-v4-2-6161a8de376f@gmail.com Signed-off-by: Thierry Reding --- .../bindings/dma/nvidia,tegra20-apbdma.txt | 44 --------- .../bindings/dma/nvidia,tegra20-apbdma.yaml | 90 +++++++++++++++++++ 2 files changed, 90 insertions(+), 44 deletions(-) delete mode 100644 Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.txt create mode 100644 Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.yaml diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.txt b/Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.txt deleted file mode 100644 index 447fb44e7abea..0000000000000 --- a/Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.txt +++ /dev/null @@ -1,44 +0,0 @@ -* NVIDIA Tegra APB DMA controller - -Required properties: -- compatible: Should be "nvidia,-apbdma" -- reg: Should contain DMA registers location and length. This should include - all of the per-channel registers. -- interrupts: Should contain all of the per-channel DMA interrupts. -- clocks: Must contain one entry, for the module clock. - See ../clocks/clock-bindings.txt for details. -- resets : Must contain an entry for each entry in reset-names. - See ../reset/reset.txt for details. -- reset-names : Must include the following entries: - - dma -- #dma-cells : Must be <1>. This dictates the length of DMA specifiers in - client nodes' dmas properties. The specifier represents the DMA request - select value for the peripheral. For more details, consult the Tegra TRM's - documentation of the APB DMA channel control register REQ_SEL field. - -Examples: - -apbdma: dma@6000a000 { - compatible = "nvidia,tegra20-apbdma"; - reg = <0x6000a000 0x1200>; - interrupts = < 0 136 0x04 - 0 137 0x04 - 0 138 0x04 - 0 139 0x04 - 0 140 0x04 - 0 141 0x04 - 0 142 0x04 - 0 143 0x04 - 0 144 0x04 - 0 145 0x04 - 0 146 0x04 - 0 147 0x04 - 0 148 0x04 - 0 149 0x04 - 0 150 0x04 - 0 151 0x04 >; - clocks = <&tegra_car 34>; - resets = <&tegra_car 34>; - reset-names = "dma"; - #dma-cells = <1>; -}; diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.yaml new file mode 100644 index 0000000000000..a2ffd5209b3bf --- /dev/null +++ b/Documentation/devicetree/bindings/dma/nvidia,tegra20-apbdma.yaml @@ -0,0 +1,90 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/nvidia,tegra20-apbdma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Tegra APB DMA Controller + +description: + The NVIDIA Tegra APB DMA controller is a hardware component that + enables direct memory access (DMA) on Tegra systems. It facilitates + data transfer between I/O devices and main memory without constant + CPU intervention. + +maintainers: + - Jonathan Hunter + +properties: + compatible: + oneOf: + - const: nvidia,tegra20-apbdma + - items: + - const: nvidia,tegra30-apbdma + - const: nvidia,tegra20-apbdma + + reg: + maxItems: 1 + + "#dma-cells": + const: 1 + + clocks: + maxItems: 1 + + interrupts: + description: + Should contain all of the per-channel DMA interrupts in + ascending order with respect to the DMA channel index. + minItems: 1 + maxItems: 32 + + resets: + maxItems: 1 + + reset-names: + const: dma + +required: + - compatible + - reg + - "#dma-cells" + - clocks + - interrupts + - resets + - reset-names + +allOf: + - $ref: dma-controller.yaml# + +unevaluatedProperties: false + +examples: + - | + #include + #include + dma-controller@6000a000 { + compatible = "nvidia,tegra30-apbdma", "nvidia,tegra20-apbdma"; + reg = <0x6000a000 0x1200>; + interrupts = , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + ; + clocks = <&tegra_car 34>; + resets = <&tegra_car 34>; + reset-names = "dma"; + #dma-cells = <1>; + }; +... -- 2.50.1