// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2016 Freescale Semiconductor, Inc. * Copyright 2017-2018 NXP * Author: Dong Aisheng <aisheng.dong@nxp.com> */ #include <linux/irqchip.h> #include <linux/mfd/syscon.h> #include <linux/of_platform.h> #include <linux/regmap.h> #include <asm/mach/arch.h> #include "common.h" #include "cpuidle.h" #include "hardware.h" #define SIM_JTAG_ID_REG 0x8c static void __init imx7ulp_set_revision(void) { struct regmap *sim; u32 revision; sim = syscon_regmap_lookup_by_compatible("fsl,imx7ulp-sim"); if (IS_ERR(sim)) { pr_warn("failed to find fsl,imx7ulp-sim regmap!\n"); return; } if (regmap_read(sim, SIM_JTAG_ID_REG, &revision)) { pr_warn("failed to read sim regmap!\n"); return; } /* * 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; } } static void __init imx7ulp_init_machine(void) { imx7ulp_pm_init(); mxc_set_cpu_type(MXC_CPU_IMX7ULP); imx7ulp_set_revision(); of_platform_default_populate(NULL, NULL, imx_soc_device_init()); } static const char *const imx7ulp_dt_compat[] __initconst = { "fsl,imx7ulp", NULL, }; static void __init imx7ulp_init_late(void) { imx7ulp_cpuidle_init(); } DT_MACHINE_START(IMX7ulp, "Freescale i.MX7ULP (Device Tree)") .init_machine = imx7ulp_init_machine, .dt_compat = imx7ulp_dt_compat, .init_late = imx7ulp_init_late, MACHINE_END