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 #include <linux/clk-provider.h>
  20
  21 #include <asm/setup.h>
  22 #include <asm/irq.h>
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/irq.h>
  26
  27 #include "at91_aic.h"
  28 #include "generic.h"
  29
  30 static void __init sama5_dt_timer_init(void)
  31 {
  32 #if defined(CONFIG_COMMON_CLK)
  33         of_clk_init(NULL);
  34 #endif
  35         at91sam926x_pit_init();
  36 }
  37
  38 static const struct of_device_id irq_of_match[] __initconst = {
  39
  40         { .compatible = "atmel,sama5d3-aic", .data = at91_aic5_of_init },
  41         { /*sentinel*/ }
  42 };
  43
  44 static void __init at91_dt_init_irq(void)
  45 {
  46         of_irq_init(irq_of_match);
  47 }
  48
  49 static int ksz9021rn_phy_fixup(struct phy_device *phy)
  50 {
  51         int value;
  52
  53         /* Set delay values */
  54         value = MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW | 0x8000;
  55         phy_write(phy, MICREL_KSZ9021_EXTREG_CTRL, value);
  56         value = 0xF2F4;
  57         phy_write(phy, MICREL_KSZ9021_EXTREG_DATA_WRITE, value);
  58         value = MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW | 0x8000;
  59         phy_write(phy, MICREL_KSZ9021_EXTREG_CTRL, value);
  60         value = 0x2222;
  61         phy_write(phy, MICREL_KSZ9021_EXTREG_DATA_WRITE, value);
  62
  63         return 0;
  64 }
  65
  66 static void __init sama5_dt_device_init(void)
  67 {
  68         if (of_machine_is_compatible("atmel,sama5d3xcm") &&
  69             IS_ENABLED(CONFIG_PHYLIB))
  70                 phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
  71                         ksz9021rn_phy_fixup);
  72
  73         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  74 }
  75
  76 static const char *sama5_dt_board_compat[] __initdata = {
  77         "atmel,sama5",
  78         NULL
  79 };
  80
  81 DT_MACHINE_START(sama5_dt, "Atmel SAMA5 (Device Tree)")
  82         /* Maintainer: Atmel */
  83         .init_time      = sama5_dt_timer_init,
  84         .map_io         = at91_map_io,
  85         .handle_irq     = at91_aic5_handle_irq,
  86         .init_early     = at91_dt_initialize,
  87         .init_irq       = at91_dt_init_irq,
  88         .init_machine   = sama5_dt_device_init,
  89         .dt_compat      = sama5_dt_board_compat,
  90 MACHINE_END