Paul Burton | eed0eab | 2016-10-05 18:18:20 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 Imagination Technologies |
| 3 | * Author: Paul Burton <paul.burton@imgtec.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2 of the License, or (at your |
| 8 | * option) any later version. |
| 9 | */ |
| 10 | |
| 11 | #ifndef __MIPS_ASM_MACHINE_H__ |
| 12 | #define __MIPS_ASM_MACHINE_H__ |
| 13 | |
| 14 | #include <linux/libfdt.h> |
| 15 | #include <linux/of.h> |
| 16 | |
| 17 | struct mips_machine { |
| 18 | const struct of_device_id *matches; |
| 19 | const void *fdt; |
| 20 | bool (*detect)(void); |
| 21 | const void *(*fixup_fdt)(const void *fdt, const void *match_data); |
| 22 | unsigned int (*measure_hpt_freq)(void); |
| 23 | }; |
| 24 | |
| 25 | extern long __mips_machines_start; |
| 26 | extern long __mips_machines_end; |
| 27 | |
| 28 | #define MIPS_MACHINE(name) \ |
| 29 | static const struct mips_machine __mips_mach_##name \ |
| 30 | __used __section(.mips.machines.init) |
| 31 | |
| 32 | #define for_each_mips_machine(mach) \ |
| 33 | for ((mach) = (struct mips_machine *)&__mips_machines_start; \ |
| 34 | (mach) < (struct mips_machine *)&__mips_machines_end; \ |
| 35 | (mach)++) |
| 36 | |
| 37 | /** |
| 38 | * mips_machine_is_compatible() - check if a machine is compatible with an FDT |
| 39 | * @mach: the machine struct to check |
| 40 | * @fdt: the FDT to check for compatibility with |
| 41 | * |
| 42 | * Check whether the given machine @mach is compatible with the given flattened |
| 43 | * device tree @fdt, based upon the compatibility property of the root node. |
| 44 | * |
| 45 | * Return: the device id matched if any, else NULL |
| 46 | */ |
| 47 | static inline const struct of_device_id * |
| 48 | mips_machine_is_compatible(const struct mips_machine *mach, const void *fdt) |
| 49 | { |
| 50 | const struct of_device_id *match; |
| 51 | |
| 52 | if (!mach->matches) |
| 53 | return NULL; |
| 54 | |
| 55 | for (match = mach->matches; match->compatible; match++) { |
| 56 | if (fdt_node_check_compatible(fdt, 0, match->compatible) == 0) |
| 57 | return match; |
| 58 | } |
| 59 | |
| 60 | return NULL; |
| 61 | } |
| 62 | |
| 63 | #endif /* __MIPS_ASM_MACHINE_H__ */ |