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/of_platform.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 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 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 49 static void s5pv210_dt_restart(enum reboot_mode mode, const char *cmd) 50 { 51 __raw_writel(0x1, S5P_SWRESET); 52 } 53 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