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

/*
 * Copyright (C) 2015 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/irqchip.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <linux/micrel_phy.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/regmap.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include "common.h"

static void __init imx6ul_enet_clk_init(void)
{
	struct regmap *gpr;

	gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr");
	if (!IS_ERR(gpr))
		regmap_update_bits(gpr, IOMUXC_GPR1, IMX6UL_GPR1_ENET_CLK_DIR,
				   IMX6UL_GPR1_ENET_CLK_OUTPUT);
	else
		pr_err("failed to find fsl,imx6ul-iomux-gpr regmap\n");

}

static int ksz8081_phy_fixup(struct phy_device *dev)
{
	if (dev && dev->interface == PHY_INTERFACE_MODE_MII) {
		phy_write(dev, 0x1f, 0x8110);
		phy_write(dev, 0x16, 0x201);
	} else if (dev && dev->interface == PHY_INTERFACE_MODE_RMII) {
		phy_write(dev, 0x1f, 0x8190);
		phy_write(dev, 0x16, 0x202);
	}

	return 0;
}

static void __init imx6ul_enet_phy_init(void)
{
	if (IS_BUILTIN(CONFIG_PHYLIB))
		phy_register_fixup_for_uid(PHY_ID_KSZ8081, MICREL_PHY_ID_MASK,
					   ksz8081_phy_fixup);
}

static inline void imx6ul_enet_init(void)
{
	imx6ul_enet_clk_init();
	imx6ul_enet_phy_init();
}

static void __init imx6ul_init_machine(void)
{
	struct device *parent;

	parent = imx_soc_device_init();
	if (parent == NULL)
		pr_warn("failed to initialize soc device\n");

	of_platform_default_populate(NULL, NULL, parent);
	imx6ul_enet_init();
	imx_anatop_init();
	imx6ul_pm_init();
}

static void __init imx6ul_init_irq(void)
{
	imx_init_revision_from_anatop();
	imx_src_init();
	irqchip_init();
	imx6_pm_ccm_init("fsl,imx6ul-ccm");
}

static void __init imx6ul_init_late(void)
{
	if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
		platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);
}

static const char * const imx6ul_dt_compat[] __initconst = {
	"fsl,imx6ul",
	NULL,
};

DT_MACHINE_START(IMX6UL, "Freescale i.MX6 Ultralite (Device Tree)")
	.init_irq	= imx6ul_init_irq,
	.init_machine	= imx6ul_init_machine,
	.init_late	= imx6ul_init_late,
	.dt_compat	= imx6ul_dt_compat,
MACHINE_END