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84 lines
1.8 KiB
84 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2016 Freescale Semiconductor, Inc. |
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* Copyright 2017-2018 NXP |
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* Author: Dong Aisheng <[email protected]> |
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*/ |
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#include <linux/irqchip.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/of_platform.h> |
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#include <linux/regmap.h> |
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#include <asm/mach/arch.h> |
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#include "common.h" |
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#include "cpuidle.h" |
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#include "hardware.h" |
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#define SIM_JTAG_ID_REG 0x8c |
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static void __init imx7ulp_set_revision(void) |
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{ |
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struct regmap *sim; |
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u32 revision; |
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sim = syscon_regmap_lookup_by_compatible("fsl,imx7ulp-sim"); |
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if (IS_ERR(sim)) { |
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pr_warn("failed to find fsl,imx7ulp-sim regmap!\n"); |
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return; |
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} |
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if (regmap_read(sim, SIM_JTAG_ID_REG, &revision)) { |
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pr_warn("failed to read sim regmap!\n"); |
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return; |
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} |
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/* |
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* bit[31:28] of JTAG_ID register defines revision as below from B0: |
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* 0001 B0 |
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* 0010 B1 |
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* 0011 B2 |
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*/ |
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switch (revision >> 28) { |
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case 1: |
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imx_set_soc_revision(IMX_CHIP_REVISION_2_0); |
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break; |
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case 2: |
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imx_set_soc_revision(IMX_CHIP_REVISION_2_1); |
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break; |
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case 3: |
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imx_set_soc_revision(IMX_CHIP_REVISION_2_2); |
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break; |
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default: |
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imx_set_soc_revision(IMX_CHIP_REVISION_1_0); |
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break; |
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} |
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} |
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static void __init imx7ulp_init_machine(void) |
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{ |
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imx7ulp_pm_init(); |
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mxc_set_cpu_type(MXC_CPU_IMX7ULP); |
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imx7ulp_set_revision(); |
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of_platform_default_populate(NULL, NULL, NULL); |
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} |
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static const char *const imx7ulp_dt_compat[] __initconst = { |
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"fsl,imx7ulp", |
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NULL, |
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}; |
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static void __init imx7ulp_init_late(void) |
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{ |
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if (IS_ENABLED(CONFIG_ARM_IMX_CPUFREQ_DT)) |
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platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0); |
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imx7ulp_cpuidle_init(); |
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} |
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DT_MACHINE_START(IMX7ulp, "Freescale i.MX7ULP (Device Tree)") |
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.init_machine = imx7ulp_init_machine, |
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.dt_compat = imx7ulp_dt_compat, |
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.init_late = imx7ulp_init_late, |
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MACHINE_END
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