Documentation/devicetree/bindings/memory-controllers/qca,ath79-ddr-controller.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/memory-controllers/qca,ath79-ddr-controller.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Qualcomm Atheros AR7xxx/AR9xxx DDR controller
   8
   9 maintainers:
  10   - Krzysztof Kozlowski <krzk@kernel.org>
  11
  12 description: |
  13   The DDR controller of the AR7xxx and AR9xxx families provides an interface to
  14   flush the FIFO between various devices and the DDR. This is mainly used by
  15   the IRQ controller to flush the FIFO before running the interrupt handler of
  16   such devices.
  17
  18 properties:
  19   compatible:
  20     oneOf:
  21       - items:
  22           - const: qca,ar9132-ddr-controller
  23           - const: qca,ar7240-ddr-controller
  24       - items:
  25           - enum:
  26               - qca,ar7100-ddr-controller
  27               - qca,ar7240-ddr-controller
  28
  29   "#qca,ddr-wb-channel-cells":
  30     description: |
  31       Specifies the number of cells needed to encode the write buffer channel
  32       index.
  33     $ref: /schemas/types.yaml#/definitions/uint32
  34     const: 1
  35
  36   reg:
  37     maxItems: 1
  38
  39 required:
  40   - compatible
  41   - "#qca,ddr-wb-channel-cells"
  42   - reg
  43
  44 additionalProperties: false
  45
  46 examples:
  47   - |
  48     ddr_ctrl: memory-controller@18000000 {
  49         compatible = "qca,ar9132-ddr-controller",
  50                      "qca,ar7240-ddr-controller";
  51         reg = <0x18000000 0x100>;
  52
  53         #qca,ddr-wb-channel-cells = <1>;
  54     };
  55
  56     interrupt-controller {
  57         // ...
  58         qca,ddr-wb-channel-interrupts = <2>, <3>, <4>, <5>;
  59         qca,ddr-wb-channels = <&ddr_ctrl 3>, <&ddr_ctrl 2>,
  60                               <&ddr_ctrl 0>, <&ddr_ctrl 1>;
  61     };