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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2015 Freescale Semiconductor, Inc.
   4  */
   5 #include <linux/irqchip.h>
   6 #include <linux/mfd/syscon.h>
   7 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
   8 #include <linux/micrel_phy.h>
   9 #include <linux/of_platform.h>
  10 #include <linux/phy.h>
  11 #include <linux/regmap.h>
  12 #include <asm/mach/arch.h>
  13 #include <asm/mach/map.h>
  14
  15 #include "common.h"
  16 #include "cpuidle.h"
  17
  18 static void __init imx6ul_enet_clk_init(void)
  19 {
  20         struct regmap *gpr;
  21
  22         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr");
  23         if (!IS_ERR(gpr))
  24                 regmap_update_bits(gpr, IOMUXC_GPR1, IMX6UL_GPR1_ENET_CLK_DIR,
  25                                    IMX6UL_GPR1_ENET_CLK_OUTPUT);
  26         else
  27                 pr_err("failed to find fsl,imx6ul-iomux-gpr regmap\n");
  28
  29 }
  30
  31 static int ksz8081_phy_fixup(struct phy_device *dev)
  32 {
  33         if (dev && dev->interface == PHY_INTERFACE_MODE_MII) {
  34                 phy_write(dev, 0x1f, 0x8110);
  35                 phy_write(dev, 0x16, 0x201);
  36         } else if (dev && dev->interface == PHY_INTERFACE_MODE_RMII) {
  37                 phy_write(dev, 0x1f, 0x8190);
  38                 phy_write(dev, 0x16, 0x202);
  39         }
  40
  41         return 0;
  42 }
  43
  44 static void __init imx6ul_enet_phy_init(void)
  45 {
  46         if (IS_BUILTIN(CONFIG_PHYLIB))
  47                 phy_register_fixup_for_uid(PHY_ID_KSZ8081, MICREL_PHY_ID_MASK,
  48                                            ksz8081_phy_fixup);
  49 }
  50
  51 static inline void imx6ul_enet_init(void)
  52 {
  53         imx6ul_enet_clk_init();
  54         imx6ul_enet_phy_init();
  55 }
  56
  57 static void __init imx6ul_init_machine(void)
  58 {
  59         struct device *parent;
  60
  61         parent = imx_soc_device_init();
  62         if (parent == NULL)
  63                 pr_warn("failed to initialize soc device\n");
  64
  65         of_platform_default_populate(NULL, NULL, parent);
  66         imx6ul_enet_init();
  67         imx_anatop_init();
  68         imx6ul_pm_init();
  69 }
  70
  71 static void __init imx6ul_init_irq(void)
  72 {
  73         imx_init_revision_from_anatop();
  74         imx_src_init();
  75         irqchip_init();
  76         imx6_pm_ccm_init("fsl,imx6ul-ccm");
  77 }
  78
  79 static void __init imx6ul_init_late(void)
  80 {
  81         imx6sx_cpuidle_init();
  82
  83         if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
  84                 platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);
  85 }
  86
  87 static const char * const imx6ul_dt_compat[] __initconst = {
  88         "fsl,imx6ul",
  89         "fsl,imx6ull",
  90         NULL,
  91 };
  92
  93 DT_MACHINE_START(IMX6UL, "Freescale i.MX6 Ultralite (Device Tree)")
  94         .init_irq       = imx6ul_init_irq,
  95         .init_machine   = imx6ul_init_machine,
  96         .init_late      = imx6ul_init_late,
  97         .dt_compat      = imx6ul_dt_compat,
  98 MACHINE_END