target/linux/ramips/patches-5.15/411-dt-bindings-add-documentation-for-mt7621-nand-driver.patch

   1 From 3d5f4da8296b23eb3abf8b13122b0d06a215e79c Mon Sep 17 00:00:00 2001
   2 From: Weijie Gao <weijie.gao@mediatek.com>
   3 Date: Wed, 1 Apr 2020 02:07:59 +0800
   4 Subject: [PATCH 2/2] dt-bindings: add documentation for mt7621-nand driver
   5
   6 This patch adds documentation for MediaTek MT7621 NAND flash controller
   7 driver.
   8
   9 Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
  10 ---
  11  .../bindings/mtd/mediatek,mt7621-nfc.yaml          | 68 ++++++++++++++++++++++
  12  1 file changed, 68 insertions(+)
  13  create mode 100644 Documentation/devicetree/bindings/mtd/mediatek,mt7621-nfc.yaml
  14
  15 --- /dev/null
  16 +++ b/Documentation/devicetree/bindings/mtd/mediatek,mt7621-nfc.yaml
  17 @@ -0,0 +1,68 @@
  18 +# SPDX-License-Identifier: GPL-2.0
  19 +%YAML 1.2
  20 +---
  21 +$id: http://devicetree.org/schemas/mtd/mediatek,mt7621-nfc.yaml#
  22 +$schema: http://devicetree.org/meta-schemas/core.yaml#
  23 +
  24 +title: MediaTek MT7621 SoC NAND Flash Controller (NFC) DT binding
  25 +
  26 +maintainers:
  27 +  - Weijie Gao <weijie.gao@mediatek.com>
  28 +
  29 +description: |
  30 +  This driver uses a single node to describe both NAND Flash controller
  31 +  interface (NFI) and ECC engine for MT7621 SoC.
  32 +  MT7621 supports only one chip select.
  33 +
  34 +properties:
  35 +  "#address-cells": false
  36 +  "#size-cells": false
  37 +
  38 +  compatible:
  39 +    enum:
  40 +      - mediatek,mt7621-nfc
  41 +
  42 +  reg:
  43 +    items:
  44 +      - description: Register base of NFI core
  45 +      - description: Register base of ECC engine
  46 +
  47 +  reg-names:
  48 +    items:
  49 +      - const: nfi
  50 +      - const: ecc
  51 +
  52 +  clocks:
  53 +    items:
  54 +      - description: Source clock for NFI core, fixed 125MHz
  55 +
  56 +  clock-names:
  57 +    items:
  58 +      - const: nfi_clk
  59 +
  60 +required:
  61 +  - compatible
  62 +  - reg
  63 +  - reg-names
  64 +  - clocks
  65 +  - clock-names
  66 +
  67 +examples:
  68 +  - |
  69 +    nficlock: nficlock {
  70 +       #clock-cells = <0>;
  71 +       compatible = "fixed-clock";
  72 +
  73 +       clock-frequency = <125000000>;
  74 +    };
  75 +
  76 +    nand@1e003000 {
  77 +       compatible = "mediatek,mt7621-nfc";
  78 +
  79 +       reg = <0x1e003000 0x800
  80 +              0x1e003800 0x800>;
  81 +       reg-names = "nfi", "ecc";
  82 +
  83 +       clocks = <&nficlock>;
  84 +       clock-names = "nfi_clk";
  85 +    };