arch/arm/mach-imx/mach-imx27.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2012 Sascha Hauer, Pengutronix
   4  */
   5
   6 #include <linux/init.h>
   7 #include <linux/irq.h>
   8 #include <linux/of_address.h>
   9 #include <linux/of_irq.h>
  10 #include <linux/of_platform.h>
  11 #include <linux/mm.h>
  12 #include <asm/mach/arch.h>
  13 #include <asm/mach/map.h>
  14 #include <asm/mach/time.h>
  15
  16 #include "common.h"
  17 #include "hardware.h"
  18 #include "mx27.h"
  19
  20 /* MX27 memory map definition */
  21 static struct map_desc imx27_io_desc[] __initdata = {
  22         /*
  23          * this fixed mapping covers:
  24          * - AIPI1
  25          * - AIPI2
  26          * - AITC
  27          * - ROM Patch
  28          * - and some reserved space
  29          */
  30         imx_map_entry(MX27, AIPI, MT_DEVICE),
  31         /*
  32          * this fixed mapping covers:
  33          * - CSI
  34          * - ATA
  35          */
  36         imx_map_entry(MX27, SAHB1, MT_DEVICE),
  37         /*
  38          * this fixed mapping covers:
  39          * - EMI
  40          */
  41         imx_map_entry(MX27, X_MEMC, MT_DEVICE),
  42 };
  43
  44 /*
  45  * Initialize the memory map. It is called during the
  46  * system startup to create static physical to virtual
  47  * memory map for the IO modules.
  48  */
  49 static void __init mx27_map_io(void)
  50 {
  51         iotable_init(imx27_io_desc, ARRAY_SIZE(imx27_io_desc));
  52 }
  53
  54 static void __init imx27_init_early(void)
  55 {
  56         mxc_set_cpu_type(MXC_CPU_MX27);
  57 }
  58
  59 static void __init mx27_init_irq(void)
  60 {
  61         void __iomem *avic_base;
  62         struct device_node *np;
  63
  64         np = of_find_compatible_node(NULL, NULL, "fsl,avic");
  65         avic_base = of_iomap(np, 0);
  66         BUG_ON(!avic_base);
  67         mxc_init_irq(avic_base);
  68 }
  69
  70 static const char * const imx27_dt_board_compat[] __initconst = {
  71         "fsl,imx27",
  72         NULL
  73 };
  74
  75 DT_MACHINE_START(IMX27_DT, "Freescale i.MX27 (Device Tree Support)")
  76         .map_io         = mx27_map_io,
  77         .init_early     = imx27_init_early,
  78         .init_irq       = mx27_init_irq,
  79         .init_late      = imx27_pm_init,
  80         .dt_compat      = imx27_dt_board_compat,
  81 MACHINE_END