git.openwrt.org Git - openwrt/staging/noltari.git/blob

   1 From 3fed02d930597c53f1c8500aff14581bb87a1e3d Mon Sep 17 00:00:00 2001
   2 From: Weijie Gao <weijie.gao@mediatek.com>
   3 Date: Fri, 20 May 2022 11:22:31 +0800
   4 Subject: [PATCH 07/25] doc: mediatek: add documentation for mt7621 reference
   5  boards
   6
   7 The MT7621 requires external binary blob being executed during u-boot's
   8 boot-up flow. It's necessary to provide a guide here for users to correctly
   9 build the u-boot.
  10
  11 Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
  12 Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
  13 ---
  14  doc/board/index.rst           |  1 +
  15  doc/board/mediatek/index.rst  |  9 +++++++
  16  doc/board/mediatek/mt7621.rst | 48 +++++++++++++++++++++++++++++++++++
  17  3 files changed, 58 insertions(+)
  18  create mode 100644 doc/board/mediatek/index.rst
  19  create mode 100644 doc/board/mediatek/mt7621.rst
  20
  21 --- a/doc/board/index.rst
  22 +++ b/doc/board/index.rst
  23 @@ -23,6 +23,7 @@ Board-specific doc
  24     highbank/index
  25     intel/index
  26     kontron/index
  27 +   mediatek/index
  28     microchip/index
  29     nokia/index
  30     nxp/index
  31 --- /dev/null
  32 +++ b/doc/board/mediatek/index.rst
  33 @@ -0,0 +1,9 @@
  34 +.. SPDX-License-Identifier: GPL-2.0+
  35 +
  36 +Mediatek
  37 +=========
  38 +
  39 +.. toctree::
  40 +   :maxdepth: 2
  41 +
  42 +   mt7621
  43 --- /dev/null
  44 +++ b/doc/board/mediatek/mt7621.rst
  45 @@ -0,0 +1,48 @@
  46 +.. SPDX-License-Identifier: GPL-2.0
  47 +
  48 +mt7621_rfb/mt7621_nand_rfb
  49 +==========================
  50 +
  51 +U-Boot for the MediaTek MT7621 boards
  52 +
  53 +Quick Start
  54 +-----------
  55 +
  56 +- Get the DDR initialization binary blob
  57 +- Configure CPU and DDR parameters
  58 +- Build U-Boot
  59 +
  60 +Get the DDR initialization binary blob
  61 +--------------------------------------
  62 +
  63 +Download one from:
  64 + - https://raw.githubusercontent.com/mtk-openwrt/mt7621-lowlevel-preloader/master/mt7621_stage_sram.bin
  65 + - https://raw.githubusercontent.com/mtk-openwrt/mt7621-lowlevel-preloader/master/mt7621_stage_sram_noprint.bin
  66 +
  67 +mt7621_stage_sram_noprint.bin has removed all output logs. To use this one,
  68 +download and rename it to mt7621_stage_sram.bin
  69 +
  70 +Put the binary blob to the u-boot build directory.
  71 +
  72 +Configure CPU and DDR parameters
  73 +--------------------------------
  74 +
  75 +menuconfig > MIPS architecture > MediaTek MIPS platforms > CPU & DDR configuration
  76 +
  77 +Select the correct DDR timing parameters for your board. The size shown here
  78 +must match the DDR size of you board.
  79 +
  80 +The frequency of CPU and DDR can also be adjusted.
  81 +
  82 +Build U-Boot
  83 +------------
  84 +
  85 +.. code-block:: bash
  86 +
  87 +   $ export CROSS_COMPILE=mipsel-linux-
  88 +   $ make O=build mt7621_rfb_defconfig # or mt7621_nand_rfb_defconfig
  89 +   $ cp mt7621_stage_sram.bin ./build/mt7621_stage_sram.bin
  90 +   $ # or cp mt7621_stage_sram_noprint.bin ./build/mt7621_stage_sram.bin
  91 +   $ make O=build
  92 +
  93 +Burn the u-boot-mt7621.bin to the SPI-NOR or NAND flash.