1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *  Author: Alexander Shiyan <shc_work@mail.ru>, 2016
 4 */
 5
 6#include <linux/io.h>
 7#include <linux/of_fdt.h>
 8#include <linux/platform_device.h>
 9#include <linux/random.h>
10#include <linux/sizes.h>
11
12#include <linux/mfd/syscon/clps711x.h>
13
14#include <asm/system_info.h>
15#include <asm/system_misc.h>
16#include <asm/mach/arch.h>
17#include <asm/mach/map.h>
18
19#define CLPS711X_VIRT_BASE	IOMEM(0xfeff4000)
20#define CLPS711X_PHYS_BASE	(0x80000000)
21# define SYSFLG1		(0x0140)
22# define HALT			(0x0800)
23# define UNIQID			(0x2440)
24# define RANDID0		(0x2700)
25# define RANDID1		(0x2704)
26# define RANDID2		(0x2708)
27# define RANDID3		(0x270c)
28
29static struct map_desc clps711x_io_desc __initdata = {
30	.virtual	= (unsigned long)CLPS711X_VIRT_BASE,
31	.pfn		= __phys_to_pfn(CLPS711X_PHYS_BASE),
32	.length		= 48 * SZ_1K,
33	.type		= MT_DEVICE,
34};
35
36static void __init clps711x_map_io(void)
37{
38	iotable_init(&clps711x_io_desc, 1);
39}
40
41static const struct resource clps711x_cpuidle_res =
42	DEFINE_RES_MEM(CLPS711X_PHYS_BASE + HALT, SZ_128);
43
44static void __init clps711x_init(void)
45{
46	u32 id[5];
47
48	id[0] = readl(CLPS711X_VIRT_BASE + UNIQID);
49	id[1] = readl(CLPS711X_VIRT_BASE + RANDID0);
50	id[2] = readl(CLPS711X_VIRT_BASE + RANDID1);
51	id[3] = readl(CLPS711X_VIRT_BASE + RANDID2);
52	id[4] = readl(CLPS711X_VIRT_BASE + RANDID3);
53	system_rev = SYSFLG1_VERID(readl(CLPS711X_VIRT_BASE + SYSFLG1));
54
55	add_device_randomness(id, sizeof(id));
56
57	system_serial_low = id[0];
58
59	platform_device_register_simple("clps711x-cpuidle", PLATFORM_DEVID_NONE,
60					&clps711x_cpuidle_res, 1);
61}
62
63static void clps711x_restart(enum reboot_mode mode, const char *cmd)
64{
65	soft_restart(0);
66}
67
68static const char *const clps711x_compat[] __initconst = {
69	"cirrus,ep7209",
70	NULL
71};
72
73DT_MACHINE_START(CLPS711X_DT, "Cirrus Logic CLPS711X (Device Tree Support)")
74	.dt_compat	= clps711x_compat,
75	.map_io		= clps711x_map_io,
76	.init_late	= clps711x_init,
77	.restart	= clps711x_restart,
78MACHINE_END

 1/*
 2 *  Author: Alexander Shiyan <shc_work@mail.ru>, 2016
 3 *
 4 * This program is free software; you can redistribute it and/or modify
 5 * it under the terms of the GNU General Public License as published by
 6 * the Free Software Foundation; either version 2 of the License, or
 7 * (at your option) any later version.
 8 */
 9
10#include <linux/io.h>
11#include <linux/of_fdt.h>
12#include <linux/platform_device.h>
13#include <linux/random.h>
14#include <linux/sizes.h>
15
16#include <linux/mfd/syscon/clps711x.h>
17
18#include <asm/system_info.h>
19#include <asm/system_misc.h>
20#include <asm/mach/arch.h>
21#include <asm/mach/map.h>
22
23#define CLPS711X_VIRT_BASE	IOMEM(0xfeff4000)
24#define CLPS711X_PHYS_BASE	(0x80000000)
25# define SYSFLG1		(0x0140)
26# define HALT			(0x0800)
27# define UNIQID			(0x2440)
28# define RANDID0		(0x2700)
29# define RANDID1		(0x2704)
30# define RANDID2		(0x2708)
31# define RANDID3		(0x270c)
32
33static struct map_desc clps711x_io_desc __initdata = {
34	.virtual	= (unsigned long)CLPS711X_VIRT_BASE,
35	.pfn		= __phys_to_pfn(CLPS711X_PHYS_BASE),
36	.length		= 48 * SZ_1K,
37	.type		= MT_DEVICE,
38};
39
40static void __init clps711x_map_io(void)
41{
42	iotable_init(&clps711x_io_desc, 1);
43}
44
45static const struct resource clps711x_cpuidle_res =
46	DEFINE_RES_MEM(CLPS711X_PHYS_BASE + HALT, SZ_128);
47
48static void __init clps711x_init(void)
49{
50	u32 id[5];
51
52	id[0] = readl(CLPS711X_VIRT_BASE + UNIQID);
53	id[1] = readl(CLPS711X_VIRT_BASE + RANDID0);
54	id[2] = readl(CLPS711X_VIRT_BASE + RANDID1);
55	id[3] = readl(CLPS711X_VIRT_BASE + RANDID2);
56	id[4] = readl(CLPS711X_VIRT_BASE + RANDID3);
57	system_rev = SYSFLG1_VERID(readl(CLPS711X_VIRT_BASE + SYSFLG1));
58
59	add_device_randomness(id, sizeof(id));
60
61	system_serial_low = id[0];
62
63	platform_device_register_simple("clps711x-cpuidle", PLATFORM_DEVID_NONE,
64					&clps711x_cpuidle_res, 1);
65}
66
67static void clps711x_restart(enum reboot_mode mode, const char *cmd)
68{
69	soft_restart(0);
70}
71
72static const char *const clps711x_compat[] __initconst = {
73	"cirrus,ep7209",
74	NULL
75};
76
77DT_MACHINE_START(CLPS711X_DT, "Cirrus Logic CLPS711X (Device Tree Support)")
78	.dt_compat	= clps711x_compat,
79	.map_io		= clps711x_map_io,
80	.init_late	= clps711x_init,
81	.restart	= clps711x_restart,
82MACHINE_END