1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Author: Alexander Shiyan <shc_work@mail.ru>, 2016
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/io.h>
7*4882a593Smuzhiyun #include <linux/of_fdt.h>
8*4882a593Smuzhiyun #include <linux/platform_device.h>
9*4882a593Smuzhiyun #include <linux/random.h>
10*4882a593Smuzhiyun #include <linux/sizes.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/mfd/syscon/clps711x.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <asm/system_info.h>
15*4882a593Smuzhiyun #include <asm/system_misc.h>
16*4882a593Smuzhiyun #include <asm/mach/arch.h>
17*4882a593Smuzhiyun #include <asm/mach/map.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #define CLPS711X_VIRT_BASE IOMEM(0xfeff4000)
20*4882a593Smuzhiyun #define CLPS711X_PHYS_BASE (0x80000000)
21*4882a593Smuzhiyun # define SYSFLG1 (0x0140)
22*4882a593Smuzhiyun # define HALT (0x0800)
23*4882a593Smuzhiyun # define UNIQID (0x2440)
24*4882a593Smuzhiyun # define RANDID0 (0x2700)
25*4882a593Smuzhiyun # define RANDID1 (0x2704)
26*4882a593Smuzhiyun # define RANDID2 (0x2708)
27*4882a593Smuzhiyun # define RANDID3 (0x270c)
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun static struct map_desc clps711x_io_desc __initdata = {
30*4882a593Smuzhiyun .virtual = (unsigned long)CLPS711X_VIRT_BASE,
31*4882a593Smuzhiyun .pfn = __phys_to_pfn(CLPS711X_PHYS_BASE),
32*4882a593Smuzhiyun .length = 48 * SZ_1K,
33*4882a593Smuzhiyun .type = MT_DEVICE,
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
clps711x_map_io(void)36*4882a593Smuzhiyun static void __init clps711x_map_io(void)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun iotable_init(&clps711x_io_desc, 1);
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun static const struct resource clps711x_cpuidle_res =
42*4882a593Smuzhiyun DEFINE_RES_MEM(CLPS711X_PHYS_BASE + HALT, SZ_128);
43*4882a593Smuzhiyun
clps711x_init(void)44*4882a593Smuzhiyun static void __init clps711x_init(void)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun u32 id[5];
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun id[0] = readl(CLPS711X_VIRT_BASE + UNIQID);
49*4882a593Smuzhiyun id[1] = readl(CLPS711X_VIRT_BASE + RANDID0);
50*4882a593Smuzhiyun id[2] = readl(CLPS711X_VIRT_BASE + RANDID1);
51*4882a593Smuzhiyun id[3] = readl(CLPS711X_VIRT_BASE + RANDID2);
52*4882a593Smuzhiyun id[4] = readl(CLPS711X_VIRT_BASE + RANDID3);
53*4882a593Smuzhiyun system_rev = SYSFLG1_VERID(readl(CLPS711X_VIRT_BASE + SYSFLG1));
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun add_device_randomness(id, sizeof(id));
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun system_serial_low = id[0];
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun platform_device_register_simple("clps711x-cpuidle", PLATFORM_DEVID_NONE,
60*4882a593Smuzhiyun &clps711x_cpuidle_res, 1);
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun
clps711x_restart(enum reboot_mode mode,const char * cmd)63*4882a593Smuzhiyun static void clps711x_restart(enum reboot_mode mode, const char *cmd)
64*4882a593Smuzhiyun {
65*4882a593Smuzhiyun soft_restart(0);
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun static const char *const clps711x_compat[] __initconst = {
69*4882a593Smuzhiyun "cirrus,ep7209",
70*4882a593Smuzhiyun NULL
71*4882a593Smuzhiyun };
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun DT_MACHINE_START(CLPS711X_DT, "Cirrus Logic CLPS711X (Device Tree Support)")
74*4882a593Smuzhiyun .dt_compat = clps711x_compat,
75*4882a593Smuzhiyun .map_io = clps711x_map_io,
76*4882a593Smuzhiyun .init_late = clps711x_init,
77*4882a593Smuzhiyun .restart = clps711x_restart,
78*4882a593Smuzhiyun MACHINE_END
79