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/*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
* Copyright 2017 NXP.
*
* 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/of_platform.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 IO mapping, and ioremap() could always share the same mapping. */
static struct map_desc mx7ulp_io_desc[] __initdata = {
mx7ulp_aips_map_entry(1, MT_DEVICE),
mx7ulp_aips_map_entry(2, MT_DEVICE),
mx7ulp_aips_map_entry(3, MT_DEVICE),
mx7ulp_aips_map_entry(4, MT_DEVICE),
mx7ulp_aips_map_entry(5, MT_DEVICE),
};
#define SIM_JTAG_ID_REG 0x8c
static void __init imx7ulp_init_machine(void)
{
struct device *parent;
struct regmap *sim;
u32 revision;
int ret;
sim = syscon_regmap_lookup_by_compatible("fsl,imx7ulp-sim");
if (IS_ERR(sim)) {
pr_err("failed to find fsl,imx7ulp-sim regmap!\n");
return;
}
ret = regmap_read(sim, SIM_JTAG_ID_REG, &revision);
if (ret)
pr_err("failed to read sim regmap!\n");
/*
* bit[31:28] of JTAG_ID register defines revision
* as below from B0:
* 0001 B0
* 0010 B1
*/
switch (revision >> 28) {
case 1:
imx_set_soc_revision(IMX_CHIP_REVISION_2_0);
break;
case 2:
imx_set_soc_revision(IMX_CHIP_REVISION_2_1);
break;
default:
imx_set_soc_revision(IMX_CHIP_REVISION_1_0);
break;
}
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static void __init imx7ulp_init_irq(void)
{
/* TBD */
mxc_set_cpu_type(MXC_CPU_IMX7ULP);
irqchip_init();
imx7ulp_pm_init();
}
static void __init imx7ulp_map_io(void)
{
iotable_init(mx7ulp_io_desc, ARRAY_SIZE(mx7ulp_io_desc));
imx7ulp_pm_map_io();
}
static void __init imx7ulp_init_late(void)
{
if (IS_ENABLED(CONFIG_ARM_IMX7ULP_CPUFREQ))
platform_device_register_simple("imx7ulp-cpufreq", -1, NULL, 0);
imx7ulp_cpuidle_init();
imx7ulp_enable_nmi();
}
static const char *const imx7ulp_dt_compat[] __initconst = {
"fsl,imx7ulp",
NULL,
};
DT_MACHINE_START(IMX7ulp, "Freescale i.MX7ULP (Device Tree)")
.map_io = imx7ulp_map_io,
.init_irq = imx7ulp_init_irq,
.init_machine = imx7ulp_init_machine,
.init_late = imx7ulp_init_late,
.dt_compat = imx7ulp_dt_compat,
MACHINE_END
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