arch/arm/mach-imx/mach-imx7d.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-imx/mach-imx7d.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-imx/mach-imx7d.c
Extension
.c
Size
1989 bytes
Lines
89
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Freescale Semiconductor, Inc.
 */
#include <linux/irqchip.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
#include <linux/platform_device.h>
#include <linux/phy.h>
#include <linux/regmap.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include "common.h"

static int bcm54220_phy_fixup(struct phy_device *dev)
{
	/* enable RXC skew select RGMII copper mode */
	phy_write(dev, 0x1e, 0x21);
	phy_write(dev, 0x1f, 0x7ea8);
	phy_write(dev, 0x1e, 0x2f);
	phy_write(dev, 0x1f, 0x71b7);

	return 0;
}

#define PHY_ID_BCM54220	0x600d8589

static void __init imx7d_enet_phy_init(void)
{
	if (IS_BUILTIN(CONFIG_PHYLIB)) {
		phy_register_fixup_for_uid(PHY_ID_BCM54220, 0xffffffff,
					   bcm54220_phy_fixup);
	}
}

static void __init imx7d_enet_clk_sel(void)
{
	struct regmap *gpr;

	gpr = syscon_regmap_lookup_by_compatible("fsl,imx7d-iomuxc-gpr");
	if (!IS_ERR(gpr)) {
		regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_TX_CLK_SEL_MASK, 0);
		regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_CLK_DIR_MASK, 0);
	} else {
		pr_err("failed to find fsl,imx7d-iomux-gpr regmap\n");
	}
}

static void __init imx7d_enet_init(void)
{
	imx7d_enet_phy_init();
	imx7d_enet_clk_sel();
}

static void __init imx7d_init_machine(void)
{
	imx_anatop_init();
	imx7d_enet_init();
}

static void __init imx7d_init_late(void)
{
	if (IS_ENABLED(CONFIG_ARM_IMX_CPUFREQ_DT))
		platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0);
}

static void __init imx7d_init_irq(void)
{
	imx_init_revision_from_anatop();
	imx7_src_init();
	irqchip_init();
}

static const char *const imx7d_dt_compat[] __initconst = {
	"fsl,imx7d",
	"fsl,imx7s",
	NULL,
};

DT_MACHINE_START(IMX7D, "Freescale i.MX7 Dual (Device Tree)")
	.smp            = smp_ops(imx7_smp_ops),
	.init_irq	= imx7d_init_irq,
	.init_machine	= imx7d_init_machine,
	.init_late      = imx7d_init_late,
	.dt_compat	= imx7d_dt_compat,
MACHINE_END

Annotation

Implementation Notes