xref: /openbmc/linux/arch/arm/mach-s5pv210/s5pv210.c (revision 8787bc51)
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