arch/arm/mach-imx/mach-imx6ul.c

   1 /*
   2  * Copyright (C) 2015 Freescale Semiconductor, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #include <linux/irqchip.h>
   9 #include <linux/mfd/syscon.h>
  10 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
  11 #include <linux/micrel_phy.h>
  12 #include <linux/of_platform.h>
  13 #include <linux/phy.h>
  14 #include <linux/regmap.h>
  15 #include <asm/mach/arch.h>
  16 #include <asm/mach/map.h>
  17
  18 #include "common.h"
  19
  20 static void __init imx6ul_enet_clk_init(void)
  21 {
  22         struct regmap *gpr;
  23
  24         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr");
  25         if (!IS_ERR(gpr))
  26                 regmap_update_bits(gpr, IOMUXC_GPR1, IMX6UL_GPR1_ENET_CLK_DIR,
  27                                    IMX6UL_GPR1_ENET_CLK_OUTPUT);
  28         else
  29                 pr_err("failed to find fsl,imx6ul-iomux-gpr regmap\n");
  30
  31 }
  32
  33 static int ksz8081_phy_fixup(struct phy_device *dev)
  34 {
  35         if (dev && dev->interface == PHY_INTERFACE_MODE_MII) {
  36                 phy_write(dev, 0x1f, 0x8110);
  37                 phy_write(dev, 0x16, 0x201);
  38         } else if (dev && dev->interface == PHY_INTERFACE_MODE_RMII) {
  39                 phy_write(dev, 0x1f, 0x8190);
  40                 phy_write(dev, 0x16, 0x202);
  41         }
  42
  43         return 0;
  44 }
  45
  46 static void __init imx6ul_enet_phy_init(void)
  47 {
  48         if (IS_BUILTIN(CONFIG_PHYLIB))
  49                 phy_register_fixup_for_uid(PHY_ID_KSZ8081, 0xffffffff,
  50                                            ksz8081_phy_fixup);
  51 }
  52
  53 static inline void imx6ul_enet_init(void)
  54 {
  55         imx6ul_enet_clk_init();
  56         imx6ul_enet_phy_init();
  57 }
  58
  59 static void __init imx6ul_init_machine(void)
  60 {
  61         struct device *parent;
  62
  63         parent = imx_soc_device_init();
  64         if (parent == NULL)
  65                 pr_warn("failed to initialize soc device\n");
  66
  67         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  68         imx6ul_enet_init();
  69         imx_anatop_init();
  70 }
  71
  72 static void __init imx6ul_init_irq(void)
  73 {
  74         imx_init_revision_from_anatop();
  75         imx_src_init();
  76         irqchip_init();
  77 }
  78
  79 static const char *imx6ul_dt_compat[] __initconst = {
  80         "fsl,imx6ul",
  81         NULL,
  82 };
  83
  84 DT_MACHINE_START(IMX6UL, "Freescale i.MX6 Ultralite (Device Tree)")
  85         .init_irq       = imx6ul_init_irq,
  86         .init_machine   = imx6ul_init_machine,
  87         .dt_compat      = imx6ul_dt_compat,
  88 MACHINE_END