/* * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com) * * Based on reduced version of METAG * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/init.h> #include <linux/reboot.h> #include <linux/memblock.h> #include <linux/of.h> #include <linux/of_fdt.h> #include <asm/clk.h> #include <asm/mach_desc.h> static const void * __init arch_get_next_mach(const char *const **match) { static const struct machine_desc *mdesc = __arch_info_begin; const struct machine_desc *m = mdesc; if (m >= __arch_info_end) return NULL; mdesc++; *match = m->dt_compat; return m; } /** * setup_machine_fdt - Machine setup when an dtb was passed to the kernel * @dt: virtual address pointer to dt blob * * If a dtb was passed to the kernel, then use it to choose the correct * machine_desc and to setup the system. */ const struct machine_desc * __init setup_machine_fdt(void *dt) { const struct machine_desc *mdesc; unsigned long dt_root; const void *clk; int len; if (!early_init_dt_scan(dt)) return NULL; mdesc = of_flat_dt_match_machine(NULL, arch_get_next_mach); if (!mdesc) machine_halt(); dt_root = of_get_flat_dt_root(); clk = of_get_flat_dt_prop(dt_root, "clock-frequency", &len); if (clk) arc_set_core_freq(of_read_ulong(clk, len/4)); return mdesc; }