1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Samsung's S5PC110/S5PV210 flattened device tree enabled machine.
4 //
5 // Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
6 // Mateusz Krawczuk <m.krawczuk@partner.samsung.com>
7 // Tomasz Figa <t.figa@samsung.com>
8
9 #include <linux/of_fdt.h>
10 #include <linux/platform_device.h>
11
12 #include <asm/mach/arch.h>
13 #include <asm/mach/map.h>
14 #include <asm/system_misc.h>
15
16 #include "common.h"
17 #include "regs-clock.h"
18
s5pv210_fdt_map_sys(unsigned long node,const char * uname,int depth,void * data)19 static int __init s5pv210_fdt_map_sys(unsigned long node, const char *uname,
20 int depth, void *data)
21 {
22 struct map_desc iodesc;
23 const __be32 *reg;
24 int len;
25
26 if (!of_flat_dt_is_compatible(node, "samsung,s5pv210-clock"))
27 return 0;
28
29 reg = of_get_flat_dt_prop(node, "reg", &len);
30 if (reg == NULL || len != (sizeof(unsigned long) * 2))
31 return 0;
32
33 iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
34 iodesc.length = be32_to_cpu(reg[1]) - 1;
35 iodesc.virtual = (unsigned long)S3C_VA_SYS;
36 iodesc.type = MT_DEVICE;
37 iotable_init(&iodesc, 1);
38
39 return 1;
40 }
41
s5pv210_dt_map_io(void)42 static void __init s5pv210_dt_map_io(void)
43 {
44 debug_ll_io_init();
45
46 of_scan_flat_dt(s5pv210_fdt_map_sys, NULL);
47 }
48
s5pv210_dt_restart(enum reboot_mode mode,const char * cmd)49 static void s5pv210_dt_restart(enum reboot_mode mode, const char *cmd)
50 {
51 __raw_writel(0x1, S5P_SWRESET);
52 }
53
s5pv210_dt_init_late(void)54 static void __init s5pv210_dt_init_late(void)
55 {
56 platform_device_register_simple("s5pv210-cpufreq", -1, NULL, 0);
57 s5pv210_pm_init();
58 }
59
60 static char const *const s5pv210_dt_compat[] __initconst = {
61 "samsung,s5pc110",
62 "samsung,s5pv210",
63 NULL
64 };
65
66 DT_MACHINE_START(S5PV210_DT, "Samsung S5PC110/S5PV210-based board")
67 .dt_compat = s5pv210_dt_compat,
68 .map_io = s5pv210_dt_map_io,
69 .restart = s5pv210_dt_restart,
70 .init_late = s5pv210_dt_init_late,
71 MACHINE_END
72