arch/arm/mach-at91/board-dt-sama5.c

   1 /*
   2  *  Setup code for SAMA5 Evaluation Kits with Device Tree support
   3  *
   4  *  Copyright (C) 2013 Atmel,
   5  *                2013 Ludovic Desroches <ludovic.desroches@atmel.com>
   6  *
   7  * Licensed under GPLv2 or later.
   8  */
   9
  10 #include <linux/types.h>
  11 #include <linux/init.h>
  12 #include <linux/module.h>
  13 #include <linux/gpio.h>
  14 #include <linux/micrel_phy.h>
  15 #include <linux/of.h>
  16 #include <linux/of_irq.h>
  17 #include <linux/of_platform.h>
  18 #include <linux/phy.h>
  19
  20 #include <asm/setup.h>
  21 #include <asm/irq.h>
  22 #include <asm/mach/arch.h>
  23 #include <asm/mach/map.h>
  24 #include <asm/mach/irq.h>
  25
  26 #include "at91_aic.h"
  27 #include "generic.h"
  28
  29
  30 static const struct of_device_id irq_of_match[] __initconst = {
  31
  32         { .compatible = "atmel,sama5d3-aic", .data = at91_aic5_of_init },
  33         { /*sentinel*/ }
  34 };
  35
  36 static void __init at91_dt_init_irq(void)
  37 {
  38         of_irq_init(irq_of_match);
  39 }
  40
  41 static int ksz9021rn_phy_fixup(struct phy_device *phy)
  42 {
  43         int value;
  44
  45         /* Set delay values */
  46         value = MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW | 0x8000;
  47         phy_write(phy, MICREL_KSZ9021_EXTREG_CTRL, value);
  48         value = 0xF2F4;
  49         phy_write(phy, MICREL_KSZ9021_EXTREG_DATA_WRITE, value);
  50         value = MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW | 0x8000;
  51         phy_write(phy, MICREL_KSZ9021_EXTREG_CTRL, value);
  52         value = 0x2222;
  53         phy_write(phy, MICREL_KSZ9021_EXTREG_DATA_WRITE, value);
  54
  55         return 0;
  56 }
  57
  58 static void __init sama5_dt_device_init(void)
  59 {
  60         if (of_machine_is_compatible("atmel,sama5d3xcm") &&
  61             IS_ENABLED(CONFIG_PHYLIB))
  62                 phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
  63                         ksz9021rn_phy_fixup);
  64
  65         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  66 }
  67
  68 static const char *sama5_dt_board_compat[] __initdata = {
  69         "atmel,sama5",
  70         NULL
  71 };
  72
  73 DT_MACHINE_START(sama5_dt, "Atmel SAMA5 (Device Tree)")
  74         /* Maintainer: Atmel */
  75         .init_time      = at91sam926x_pit_init,
  76         .map_io         = at91_map_io,
  77         .handle_irq     = at91_aic5_handle_irq,
  78         .init_early     = at91_dt_initialize,
  79         .init_irq       = at91_dt_init_irq,
  80         .init_machine   = sama5_dt_device_init,
  81         .dt_compat      = sama5_dt_board_compat,
  82 MACHINE_END