target/linux/brcm47xx/patches-3.18/034-MIPS-BCM47XX-Initialize-bcma-bus-later-with-mm-avail.patch

   1 From e5810fa0c1bed16fdfb408862a2e17e962ec5cf6 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
   3 Date: Tue, 28 Oct 2014 14:40:38 +0100
   4 Subject: [PATCH 158/158] MIPS: BCM47XX: Initialize bcma bus later (with mm
   5  available)
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Initializaion with memory allocator available will be much simpler, this
  11 will allow cleanup in the bcma code.
  12
  13 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  14 Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
  15 Cc: linux-mips@linux-mips.org
  16 Patchwork: https://patchwork.linux-mips.org/patch/8234/
  17 Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
  18 ---
  19  arch/mips/bcm47xx/bcm47xx_private.h |  3 +++
  20  arch/mips/bcm47xx/irq.c             |  8 ++++++++
  21  arch/mips/bcm47xx/setup.c           | 33 +++++++++++++++++++++++++++------
  22  3 files changed, 38 insertions(+), 6 deletions(-)
  23
  24 diff --git a/arch/mips/bcm47xx/bcm47xx_private.h b/arch/mips/bcm47xx/bcm47xx_private.h
  25 index 12a112d..ea909a5 100644
  26 --- a/arch/mips/bcm47xx/bcm47xx_private.h
  27 +++ b/arch/mips/bcm47xx/bcm47xx_private.h
  28 @@ -15,6 +15,9 @@ int __init bcm47xx_buttons_register(void);
  29  /* leds.c */
  30  void __init bcm47xx_leds_register(void);
  31
  32 +/* setup.c */
  33 +void __init bcm47xx_bus_setup(void);
  34 +
  35  /* workarounds.c */
  36  void __init bcm47xx_workarounds(void);
  37
  38 diff --git a/arch/mips/bcm47xx/irq.c b/arch/mips/bcm47xx/irq.c
  39 index e0585b7..21b4497 100644
  40 --- a/arch/mips/bcm47xx/irq.c
  41 +++ b/arch/mips/bcm47xx/irq.c
  42 @@ -22,6 +22,8 @@
  43   *  675 Mass Ave, Cambridge, MA 02139, USA.
  44   */
  45
  46 +#include "bcm47xx_private.h"
  47 +
  48  #include <linux/types.h>
  49  #include <linux/interrupt.h>
  50  #include <linux/irq.h>
  51 @@ -65,6 +67,12 @@ DEFINE_HWx_IRQDISPATCH(7)
  52
  53  void __init arch_init_irq(void)
  54  {
  55 +       /*
  56 +        * This is the first arch callback after mm_init (we can use kmalloc),
  57 +        * so let's finish bus initialization now.
  58 +        */
  59 +       bcm47xx_bus_setup();
  60 +
  61  #ifdef CONFIG_BCM47XX_BCMA
  62         if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
  63                 bcma_write32(bcm47xx_bus.bcma.bus.drv_mips.core,
  64 diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
  65 index 444c65a..e43b504 100644
  66 --- a/arch/mips/bcm47xx/setup.c
  67 +++ b/arch/mips/bcm47xx/setup.c
  68 @@ -156,15 +156,14 @@ static void __init bcm47xx_register_bcma(void)
  69         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
  70         if (err)
  71                 panic("Failed to register BCMA bus (err %d)", err);
  72 -
  73 -       err = bcma_host_soc_init(&bcm47xx_bus.bcma);
  74 -       if (err)
  75 -               panic("Failed to initialize BCMA bus (err %d)", err);
  76 -
  77 -       bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
  78  }
  79  #endif
  80
  81 +/*
  82 + * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
  83 + * to detect memory and record it with add_memory_region.
  84 + * Any extra initializaion performed here must not use kmalloc or bootmem.
  85 + */
  86  void __init plat_mem_setup(void)
  87  {
  88         struct cpuinfo_mips *c = &current_cpu_data;
  89 @@ -193,6 +192,28 @@ void __init plat_mem_setup(void)
  90         _machine_restart = bcm47xx_machine_restart;
  91         _machine_halt = bcm47xx_machine_halt;
  92         pm_power_off = bcm47xx_machine_halt;
  93 +}
  94 +
  95 +/*
  96 + * This finishes bus initialization doing things that were not possible without
  97 + * kmalloc. Make sure to call it late enough (after mm_init).
  98 + */
  99 +void __init bcm47xx_bus_setup(void)
 100 +{
 101 +#ifdef CONFIG_BCM47XX_BCMA
 102 +       if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
 103 +               int err;
 104 +
 105 +               err = bcma_host_soc_init(&bcm47xx_bus.bcma);
 106 +               if (err)
 107 +                       panic("Failed to initialize BCMA bus (err %d)", err);
 108 +
 109 +               bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo,
 110 +                                           NULL);
 111 +       }
 112 +#endif
 113 +
 114 +       /* With bus initialized we can access NVRAM and detect the board */
 115         bcm47xx_board_detect();
 116         mips_set_machine_name(bcm47xx_board_get_name());
 117  }
 118 --
 119 1.8.4.5
 120