arch/arm/mach-imx/mach-imx6sl.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-imx/mach-imx6sl.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-imx/mach-imx6sl.c
Extension
.c
Size
1970 bytes
Lines
83
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 2013 Freescale Semiconductor, Inc.
 */

#include <linux/irqchip.h>
#include <linux/of_platform.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <linux/regmap.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include "common.h"
#include "cpuidle.h"
#include "hardware.h"

static void __init imx6sl_fec_init(void)
{
	struct regmap *gpr;

	/* set FEC clock from internal PLL clock source */
	gpr = syscon_regmap_lookup_by_compatible("fsl,imx6sl-iomuxc-gpr");
	if (!IS_ERR(gpr)) {
		regmap_update_bits(gpr, IOMUXC_GPR1,
			IMX6SL_GPR1_FEC_CLOCK_MUX2_SEL_MASK, 0);
		regmap_update_bits(gpr, IOMUXC_GPR1,
			IMX6SL_GPR1_FEC_CLOCK_MUX1_SEL_MASK, 0);
	} else {
		pr_err("failed to find fsl,imx6sl-iomux-gpr regmap\n");
	}
}

static void __init imx6sl_init_late(void)
{
	/* imx6sl reuses imx6q cpufreq driver */
	if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
		platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);

	if (IS_ENABLED(CONFIG_SOC_IMX6SL) && cpu_is_imx6sl())
		imx6sl_cpuidle_init();
	else if (IS_ENABLED(CONFIG_SOC_IMX6SLL))
		imx6sx_cpuidle_init();
}

static void __init imx6sl_init_machine(void)
{
	of_platform_default_populate(NULL, NULL, NULL);

	if (cpu_is_imx6sl())
		imx6sl_fec_init();
	imx_anatop_init();
	imx6sl_pm_init();
}

static void __init imx6sl_init_irq(void)
{
	imx_gpc_check_dt();
	imx_init_revision_from_anatop();
	imx_init_l2cache();
	imx_src_init();
	irqchip_init();
	if (cpu_is_imx6sl())
		imx6_pm_ccm_init("fsl,imx6sl-ccm");
	else
		imx6_pm_ccm_init("fsl,imx6sll-ccm");
}

static const char * const imx6sl_dt_compat[] __initconst = {
	"fsl,imx6sl",
	"fsl,imx6sll",
	NULL,
};

DT_MACHINE_START(IMX6SL, "Freescale i.MX6 SoloLite (Device Tree)")
	.l2c_aux_val 	= 0,
	.l2c_aux_mask	= ~0,
	.init_irq	= imx6sl_init_irq,
	.init_machine	= imx6sl_init_machine,
	.init_late      = imx6sl_init_late,
	.dt_compat	= imx6sl_dt_compat,
MACHINE_END

Annotation

Implementation Notes