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/of_platform.h>
  18 #include <linux/io.h>
  19 #include <linux/time-armada-370-xp.h>
  20 #include <linux/clk/mvebu.h>
  21 #include <linux/dma-mapping.h>
  22 #include <asm/mach/arch.h>
  23 #include <asm/mach/map.h>
  24 #include <asm/mach/time.h>
  25 #include "armada-370-xp.h"
  26 #include "common.h"
  27 #include "coherency.h"
  28
  29 static struct map_desc armada_370_xp_io_desc[] __initdata = {
  30         {
  31                 .virtual        = (unsigned long) ARMADA_370_XP_REGS_VIRT_BASE,
  32                 .pfn            = __phys_to_pfn(ARMADA_370_XP_REGS_PHYS_BASE),
  33                 .length         = ARMADA_370_XP_REGS_SIZE,
  34                 .type           = MT_DEVICE,
  35         },
  36 };
  37
  38 void __init armada_370_xp_map_io(void)
  39 {
  40         iotable_init(armada_370_xp_io_desc, ARRAY_SIZE(armada_370_xp_io_desc));
  41 }
  42
  43 void __init armada_370_xp_timer_and_clk_init(void)
  44 {
  45         mvebu_clocks_init();
  46         armada_370_xp_timer_init();
  47 }
  48
  49 void __init armada_370_xp_init_early(void)
  50 {
  51         /*
  52          * Some Armada 370/XP devices allocate their coherent buffers
  53          * from atomic context. Increase size of atomic coherent pool
  54          * to make sure such the allocations won't fail.
  55          */
  56         init_dma_coherent_pool_size(SZ_1M);
  57 }
  58
  59 struct sys_timer armada_370_xp_timer = {
  60         .init           = armada_370_xp_timer_and_clk_init,
  61 };
  62
  63 static void __init armada_370_xp_dt_init(void)
  64 {
  65         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  66         coherency_init();
  67 }
  68
  69 static const char * const armada_370_xp_dt_compat[] = {
  70         "marvell,armada-370-xp",
  71         NULL,
  72 };
  73
  74 DT_MACHINE_START(ARMADA_XP_DT, "Marvell Armada 370/XP (Device Tree)")
  75         .smp            = smp_ops(armada_xp_smp_ops),
  76         .init_machine   = armada_370_xp_dt_init,
  77         .map_io         = armada_370_xp_map_io,
  78         .init_early     = armada_370_xp_init_early,
  79         .init_irq       = armada_370_xp_init_irq,
  80         .handle_irq     = armada_370_xp_handle_irq,
  81         .timer          = &armada_370_xp_timer,
  82         .restart        = mvebu_restart,
  83         .dt_compat      = armada_370_xp_dt_compat,
  84 MACHINE_END