| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2009 Lemote Inc. |
| 4 | * Author: Wu Zhangjin, wuzhangjin@gmail.com |
| 5 | */ |
| 6 | |
| 7 | #include <linux/err.h> |
| 8 | #include <linux/smp.h> |
| 9 | #include <linux/platform_device.h> |
| 10 | |
| 11 | static struct platform_device loongson2_cpufreq_device = { |
| 12 | .name = "loongson2_cpufreq", |
| 13 | .id = -1, |
| 14 | }; |
| 15 | |
| 16 | static int __init loongson2_cpufreq_init(void) |
| 17 | { |
| 18 | struct cpuinfo_mips *c = ¤t_cpu_data; |
| 19 | |
| 20 | /* Only 2F revision and its successors support CPUFreq */ |
| 21 | if ((c->processor_id & PRID_REV_MASK) >= PRID_REV_LOONGSON2F) |
| 22 | return platform_device_register(&loongson2_cpufreq_device); |
| 23 | |
| 24 | return -ENODEV; |
| 25 | } |
| 26 | |
| 27 | arch_initcall(loongson2_cpufreq_init); |
| 28 |