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| /*
| * Copyright (C) 2006 - 2008 Lemote Inc. & Institute of Computing Technology
| * Author: Yanhua, yanh@lemote.com
| *
| * This file is subject to the terms and conditions of the GNU General Public
| * License. See the file "COPYING" in the main directory of this archive
| * for more details.
| */
| #include <linux/cpufreq.h>
| #include <linux/errno.h>
| #include <linux/export.h>
|
| #include <asm/mach-loongson2ef/loongson.h>
|
| enum {
| DC_ZERO, DC_25PT = 2, DC_37PT, DC_50PT, DC_62PT, DC_75PT,
| DC_87PT, DC_DISABLE, DC_RESV
| };
|
| struct cpufreq_frequency_table loongson2_clockmod_table[] = {
| {0, DC_RESV, CPUFREQ_ENTRY_INVALID},
| {0, DC_ZERO, CPUFREQ_ENTRY_INVALID},
| {0, DC_25PT, 0},
| {0, DC_37PT, 0},
| {0, DC_50PT, 0},
| {0, DC_62PT, 0},
| {0, DC_75PT, 0},
| {0, DC_87PT, 0},
| {0, DC_DISABLE, 0},
| {0, DC_RESV, CPUFREQ_TABLE_END},
| };
| EXPORT_SYMBOL_GPL(loongson2_clockmod_table);
|
| int loongson2_cpu_set_rate(unsigned long rate_khz)
| {
| struct cpufreq_frequency_table *pos;
| int regval;
|
| cpufreq_for_each_valid_entry(pos, loongson2_clockmod_table)
| if (rate_khz == pos->frequency)
| break;
| if (rate_khz != pos->frequency)
| return -ENOTSUPP;
|
| regval = readl(LOONGSON_CHIPCFG);
| regval = (regval & ~0x7) | (pos->driver_data - 1);
| writel(regval, LOONGSON_CHIPCFG);
|
| return 0;
| }
| EXPORT_SYMBOL_GPL(loongson2_cpu_set_rate);
|
|
