target/linux/ramips/dts/mt7621_xiaomi_nand_128m.dtsi

   1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
   2
   3 #include "mt7621.dtsi"
   4
   5 #include <dt-bindings/gpio/gpio.h>
   6 #include <dt-bindings/input/input.h>
   7
   8 / {
   9         chosen {
  10                 bootargs = "console=ttyS0,115200n8";
  11         };
  12
  13         keys: keys {
  14                 compatible = "gpio-keys";
  15
  16                 reset {
  17                         label = "reset";
  18                         gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
  19                         linux,code = <KEY_RESTART>;
  20                 };
  21         };
  22 };
  23
  24 &nand {
  25         status = "okay";
  26
  27         partitions {
  28                 compatible = "fixed-partitions";
  29                 #address-cells = <1>;
  30                 #size-cells = <1>;
  31
  32                 partition@0 {
  33                         label = "Bootloader";
  34                         reg = <0x0 0x80000>;
  35                         read-only;
  36                 };
  37
  38                 partition@80000 {
  39                         label = "Config";
  40                         reg = <0x80000 0x40000>;
  41                 };
  42
  43                 partition@c0000 {
  44                         label = "Bdata";
  45                         reg = <0xc0000 0x40000>;
  46                         read-only;
  47                 };
  48
  49                 factory: partition@100000 {
  50                         label = "factory";
  51                         reg = <0x100000 0x40000>;
  52                         read-only;
  53                 };
  54
  55                 partition@140000 {
  56                         label = "crash";
  57                         reg = <0x140000 0x40000>;
  58                 };
  59
  60                 partition@180000 {
  61                         label = "crash_syslog";
  62                         reg = <0x180000 0x40000>;
  63                 };
  64
  65                 partition@1c0000 {
  66                         label = "reserved0";
  67                         reg = <0x1c0000 0x40000>;
  68                         read-only;
  69                 };
  70
  71                 /* uboot expects to find kernels at 0x200000 & 0x600000
  72                  * referred to as system 1 & system 2 respectively.
  73                  * a kernel is considered suitable for handing control over
  74                  * if its linux magic number exists & uImage CRC are correct.
  75                  * If either of those conditions fail, a matching sys'n'_fail flag
  76                  * is set in uboot env & a restart performed in the hope that the
  77                  * alternate kernel is okay.
  78                  * if neither kernel checksums ok and both are marked failed, system 2
  79                  * is booted anyway.
  80                  *
  81                  * Note uboot's tftp flash install writes the transferred
  82                  * image to both kernel partitions.
  83                  */
  84
  85                 /* We keep stock xiaomi firmware (kernel0) here */
  86                 partition@200000 {
  87                         label = "kernel_stock";
  88                         reg = <0x200000 0x400000>;
  89                 };
  90
  91                 partition@600000 {
  92                         label = "kernel";
  93                         reg = <0x600000 0x400000>;
  94                 };
  95
  96                 /* ubi partition is the result of squashing
  97                  * next consecutive stock partitions:
  98                  * - rootfs0 (rootfs partition for stock kernel0),
  99                  * - rootfs1 (rootfs partition for stock failsafe kernel1),
 100                  * - overlay (used as ubi overlay in stock fw)
 101                  * resulting 117,5MiB space for packages.
 102                  */
 103
 104                 partition@a00000 {
 105                         label = "ubi";
 106                         reg = <0xa00000 0x7580000>;
 107                 };
 108         };
 109 };