target/linux/brcm63xx/patches-4.4/367-MIPS-BCM63XX-add-support-for-loading-DTB.patch

   1 From 26546e5499d98616322fb3472b977e2e86603f3a Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jogo@openwrt.org>
   3 Date: Tue, 24 Jun 2014 10:57:51 +0200
   4 Subject: [PATCH 45/48] MIPS: BCM63XX: add support for loading DTB
   5
   6 Signed-off-by: Jonas Gorski <jogo@openwrt.org>
   7 ---
   8  arch/mips/bcm63xx/boards/Kconfig        |    4 ++++
   9  arch/mips/bcm63xx/boards/board_common.c |   34 +++++++++++++++++++++++++++++++
  10  arch/mips/bcm63xx/prom.c                |    6 ++++++
  11  3 files changed, 44 insertions(+)
  12
  13 --- a/arch/mips/bcm63xx/boards/Kconfig
  14 +++ b/arch/mips/bcm63xx/boards/Kconfig
  15 @@ -1,6 +1,10 @@
  16  menu "Board support"
  17         depends on BCM63XX
  18
  19 +config BOARD_BCM63XX_DT
  20 +       bool "Device Tree boards (experimential)"
  21 +       select USE_OF
  22 +
  23  config BOARD_BCM963XX
  24         bool "Generic Broadcom 963xx boards"
  25         select SSB
  26 --- a/arch/mips/bcm63xx/boards/board_common.c
  27 +++ b/arch/mips/bcm63xx/boards/board_common.c
  28 @@ -10,12 +10,15 @@
  29  #include <linux/init.h>
  30  #include <linux/kernel.h>
  31  #include <linux/string.h>
  32 +#include <linux/of_fdt.h>
  33 +#include <linux/of_platform.h>
  34  #include <linux/platform_device.h>
  35  #include <linux/ssb/ssb.h>
  36  #include <linux/spi/spi.h>
  37  #include <asm/addrspace.h>
  38  #include <asm/bootinfo.h>
  39  #include <asm/fw/cfe/cfe_api.h>
  40 +#include <asm/prom.h>
  41  #include <bcm63xx_board.h>
  42  #include <bcm63xx_cpu.h>
  43  #include <bcm63xx_dev_uart.h>
  44 @@ -127,8 +130,23 @@ void __init board_setup(void)
  45         /* make sure we're running on expected cpu */
  46         if (bcm63xx_get_cpu_id() != board.expected_cpu_id)
  47                 panic("unexpected CPU for bcm963xx board");
  48 +
  49 +#if CONFIG_OF
  50 +       if (initial_boot_params)
  51 +               __dt_setup_arch(initial_boot_params);
  52 +#endif
  53  }
  54
  55 +#if CONFIG_OF
  56 +void __init device_tree_init(void)
  57 +{
  58 +       if (!initial_boot_params)
  59 +               return;
  60 +
  61 +       unflatten_and_copy_device_tree();
  62 +}
  63 +#endif
  64 +
  65  static struct gpio_led_platform_data bcm63xx_led_data;
  66
  67  static struct platform_device bcm63xx_gpio_leds = {
  68 @@ -137,6 +155,13 @@ static struct platform_device bcm63xx_gp
  69         .dev.platform_data      = &bcm63xx_led_data,
  70  };
  71
  72 +#if CONFIG_OF
  73 +static struct of_device_id of_ids[] = {
  74 +       { /* filled at runtime */ },
  75 +       { .compatible = "simple-bus" },
  76 +       { },
  77 +};
  78 +#endif
  79  /*
  80   * third stage init callback, register all board devices.
  81   */
  82 @@ -144,6 +169,15 @@ int __init board_register_devices(void)
  83  {
  84         int usbh_ports = 0;
  85
  86 +#if CONFIG_OF
  87 +       if (of_have_populated_dt()) {
  88 +               snprintf(of_ids[0].compatible, sizeof(of_ids[0].compatible),
  89 +                        "brcm,bcm%x", bcm63xx_get_cpu_id());
  90 +
  91 +               of_platform_populate(NULL, of_ids, NULL, NULL);
  92 +       }
  93 +#endif
  94 +
  95         if (board.has_uart0)
  96                 bcm63xx_uart_register(0);
  97
  98 --- a/arch/mips/bcm63xx/prom.c
  99 +++ b/arch/mips/bcm63xx/prom.c
 100 @@ -8,6 +8,7 @@
 101
 102  #include <linux/init.h>
 103  #include <linux/bootmem.h>
 104 +#include <linux/of_fdt.h>
 105  #include <linux/smp.h>
 106  #include <asm/bootinfo.h>
 107  #include <asm/bmips.h>
 108 @@ -23,6 +24,11 @@ void __init prom_init(void)
 109  {
 110         u32 reg, mask;
 111
 112 +#if CONFIG_OF
 113 +       if (fw_arg0 == -2)
 114 +               early_init_dt_verify((void *)fw_arg1);
 115 +#endif
 116 +
 117         bcm63xx_cpu_init();
 118
 119         /* stop any running watchdog */