1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 5 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org> 6 * Copyright (C) 2013 John Crispin <john@phrozen.org> 7 */ 8 9 #include <linux/io.h> 10 #include <linux/clk.h> 11 #include <linux/export.h> 12 #include <linux/init.h> 13 #include <linux/sizes.h> 14 #include <linux/of_fdt.h> 15 #include <linux/kernel.h> 16 #include <linux/memblock.h> 17 #include <linux/of_platform.h> 18 #include <linux/of_address.h> 19 20 #include <asm/reboot.h> 21 #include <asm/bootinfo.h> 22 #include <asm/addrspace.h> 23 #include <asm/prom.h> 24 #include <asm/mach-ralink/ralink_regs.h> 25 26 #include "common.h" 27 28 __iomem void *rt_sysc_membase; 29 __iomem void *rt_memc_membase; 30 EXPORT_SYMBOL_GPL(rt_sysc_membase); 31 32 __iomem void *plat_of_remap_node(const char *node) 33 { 34 struct resource res; 35 struct device_node *np; 36 37 np = of_find_compatible_node(NULL, NULL, node); 38 if (!np) 39 panic("Failed to find %s node", node); 40 41 if (of_address_to_resource(np, 0, &res)) 42 panic("Failed to get resource for %s", node); 43 44 of_node_put(np); 45 46 if (!request_mem_region(res.start, 47 resource_size(&res), 48 res.name)) 49 panic("Failed to request resources for %s", node); 50 51 return ioremap(res.start, resource_size(&res)); 52 } 53 54 void __init plat_mem_setup(void) 55 { 56 void *dtb; 57 58 set_io_port_base(KSEG1); 59 60 /* 61 * Load the builtin devicetree. This causes the chosen node to be 62 * parsed resulting in our memory appearing. 63 */ 64 dtb = get_fdt(); 65 __dt_setup_arch(dtb); 66 67 if (early_init_dt_scan_memory()) 68 return; 69 70 if (soc_info.mem_detect) 71 soc_info.mem_detect(); 72 else if (soc_info.mem_size) 73 memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M); 74 else 75 detect_memory_region(soc_info.mem_base, 76 soc_info.mem_size_min * SZ_1M, 77 soc_info.mem_size_max * SZ_1M); 78 } 79 80 static int __init plat_of_setup(void) 81 { 82 __dt_register_buses(soc_info.compatible, "palmbus"); 83 84 /* make sure that the reset controller is setup early */ 85 if (ralink_soc != MT762X_SOC_MT7621AT) 86 ralink_rst_init(); 87 88 return 0; 89 } 90 91 arch_initcall(plat_of_setup); 92