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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Author: Alexander Shiyan <shc_work@mail.ru>, 2016
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*/
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#include <linux/io.h>
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#include <linux/of_fdt.h>
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#include <linux/platform_device.h>
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#include <linux/random.h>
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#include <linux/sizes.h>
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#include <linux/mfd/syscon/clps711x.h>
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#include <asm/system_info.h>
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#include <asm/system_misc.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#define CLPS711X_VIRT_BASE IOMEM(0xfeff4000)
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#define CLPS711X_PHYS_BASE (0x80000000)
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# define SYSFLG1 (0x0140)
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# define HALT (0x0800)
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# define UNIQID (0x2440)
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# define RANDID0 (0x2700)
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# define RANDID1 (0x2704)
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# define RANDID2 (0x2708)
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# define RANDID3 (0x270c)
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static struct map_desc clps711x_io_desc __initdata = {
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.virtual = (unsigned long)CLPS711X_VIRT_BASE,
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.pfn = __phys_to_pfn(CLPS711X_PHYS_BASE),
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.length = 48 * SZ_1K,
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.type = MT_DEVICE,
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};
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static void __init clps711x_map_io(void)
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{
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iotable_init(&clps711x_io_desc, 1);
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}
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static const struct resource clps711x_cpuidle_res =
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DEFINE_RES_MEM(CLPS711X_PHYS_BASE + HALT, SZ_128);
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static void __init clps711x_init(void)
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{
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u32 id[5];
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id[0] = readl(CLPS711X_VIRT_BASE + UNIQID);
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id[1] = readl(CLPS711X_VIRT_BASE + RANDID0);
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id[2] = readl(CLPS711X_VIRT_BASE + RANDID1);
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id[3] = readl(CLPS711X_VIRT_BASE + RANDID2);
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id[4] = readl(CLPS711X_VIRT_BASE + RANDID3);
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system_rev = SYSFLG1_VERID(readl(CLPS711X_VIRT_BASE + SYSFLG1));
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add_device_randomness(id, sizeof(id));
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system_serial_low = id[0];
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platform_device_register_simple("clps711x-cpuidle", PLATFORM_DEVID_NONE,
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&clps711x_cpuidle_res, 1);
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}
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static void clps711x_restart(enum reboot_mode mode, const char *cmd)
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{
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soft_restart(0);
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}
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static const char *const clps711x_compat[] __initconst = {
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"cirrus,ep7209",
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NULL
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};
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DT_MACHINE_START(CLPS711X_DT, "Cirrus Logic CLPS711X (Device Tree Support)")
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.dt_compat = clps711x_compat,
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.map_io = clps711x_map_io,
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.init_late = clps711x_init,
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.restart = clps711x_restart,
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MACHINE_END
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