arch/arm/mach-mvebu/armada-370-xp.c

   1 /*
   2  * Device Tree support for Armada 370 and XP platforms.
   3  *
   4  * Copyright (C) 2012 Marvell
   5  *
   6  * Lior Amsalem <alior@marvell.com>
   7  * Gregory CLEMENT <gregory.clement@free-electrons.com>
   8  * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
   9  *
  10  * This file is licensed under the terms of the GNU General Public
  11  * License version 2.  This program is licensed "as is" without any
  12  * warranty of any kind, whether express or implied.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/clk-provider.h>
  18 #include <linux/of_address.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/io.h>
  21 #include <linux/clocksource.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/mbus.h>
  24 #include <linux/slab.h>
  25 #include <asm/hardware/cache-l2x0.h>
  26 #include <asm/mach/arch.h>
  27 #include <asm/mach/map.h>
  28 #include <asm/mach/time.h>
  29 #include "armada-370-xp.h"
  30 #include "common.h"
  31 #include "coherency.h"
  32 #include "mvebu-soc-id.h"
  33
  34 static void __init armada_370_xp_map_io(void)
  35 {
  36         debug_ll_io_init();
  37 }
  38
  39 static void __init armada_370_xp_timer_and_clk_init(void)
  40 {
  41         of_clk_init(NULL);
  42         clocksource_of_init();
  43         coherency_init();
  44         BUG_ON(mvebu_mbus_dt_init());
  45 #ifdef CONFIG_CACHE_L2X0
  46         l2x0_of_init(0, ~0UL);
  47 #endif
  48 }
  49
  50 static void __init i2c_quirk(void)
  51 {
  52         struct device_node *np;
  53         u32 dev, rev;
  54
  55         /*
  56          * Only revisons more recent than A0 support the offload
  57          * mechanism. We can exit only if we are sure that we can
  58          * get the SoC revision and it is more recent than A0.
  59          */
  60         if (mvebu_get_soc_id(&rev, &dev) == 0 && dev > MV78XX0_A0_REV)
  61                 return;
  62
  63         for_each_compatible_node(np, NULL, "marvell,mv78230-i2c") {
  64                 struct property *new_compat;
  65
  66                 new_compat = kzalloc(sizeof(*new_compat), GFP_KERNEL);
  67
  68                 new_compat->name = kstrdup("compatible", GFP_KERNEL);
  69                 new_compat->length = sizeof("marvell,mv78230-a0-i2c");
  70                 new_compat->value = kstrdup("marvell,mv78230-a0-i2c",
  71                                                 GFP_KERNEL);
  72
  73                 of_update_property(np, new_compat);
  74         }
  75         return;
  76 }
  77
  78 static void __init armada_370_xp_dt_init(void)
  79 {
  80         if (of_machine_is_compatible("plathome,openblocks-ax3-4"))
  81                 i2c_quirk();
  82         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  83 }
  84
  85 static const char * const armada_370_xp_dt_compat[] = {
  86         "marvell,armada-370-xp",
  87         NULL,
  88 };
  89
  90 DT_MACHINE_START(ARMADA_XP_DT, "Marvell Armada 370/XP (Device Tree)")
  91         .smp            = smp_ops(armada_xp_smp_ops),
  92         .init_machine   = armada_370_xp_dt_init,
  93         .map_io         = armada_370_xp_map_io,
  94         .init_time      = armada_370_xp_timer_and_clk_init,
  95         .restart        = mvebu_restart,
  96         .dt_compat      = armada_370_xp_dt_compat,
  97 MACHINE_END