diff options
Diffstat (limited to 'arch/blackfin/mach-bf537/cpu.c')
| -rw-r--r-- | arch/blackfin/mach-bf537/cpu.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/arch/blackfin/mach-bf537/cpu.c b/arch/blackfin/mach-bf537/cpu.c deleted file mode 100644 index 0442c4c7f72..00000000000 --- a/arch/blackfin/mach-bf537/cpu.c +++ /dev/null @@ -1,159 +0,0 @@ -/* - * File: arch/blackfin/mach-bf537/cpu.c - * Based on: - * Author: michael.kang@analog.com - * - * Created: - * Description: clock scaling for the bf537 - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/cpufreq.h> -#include <asm/dpmc.h> -#include <linux/fs.h> -#include <asm/bfin-global.h> - -/* CONFIG_CLKIN_HZ=11059200 */ -#define VCO5 (CONFIG_CLKIN_HZ*45) /*497664000 */ -#define VCO4 (CONFIG_CLKIN_HZ*36) /*398131200 */ -#define VCO3 (CONFIG_CLKIN_HZ*27) /*298598400 */ -#define VCO2 (CONFIG_CLKIN_HZ*18) /*199065600 */ -#define VCO1 (CONFIG_CLKIN_HZ*9) /*99532800 */ -#define VCO(x) VCO##x - -#define MFREQ(x) {VCO(x),VCO(x)/4},{VCO(x),VCO(x)/2},{VCO(x),VCO(x)} -/* frequency */ -static struct cpufreq_frequency_table bf537_freq_table[] = { - MFREQ(1), - MFREQ(3), - {VCO4, VCO4 / 2}, {VCO4, VCO4}, - MFREQ(5), - {0, CPUFREQ_TABLE_END}, -}; - -/* - * dpmc_fops->ioctl() - * static int dpmc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) - */ -static int bf537_getfreq(unsigned int cpu) -{ - unsigned long cclk_mhz; - - /* The driver only support single cpu */ - if (cpu == 0) - dpmc_fops.ioctl(NULL, NULL, IOCTL_GET_CORECLOCK, &cclk_mhz); - else - cclk_mhz = -1; - - return cclk_mhz; -} - -static int bf537_target(struct cpufreq_policy *policy, - unsigned int target_freq, unsigned int relation) -{ - unsigned long cclk_mhz; - unsigned long vco_mhz; - unsigned long flags; - unsigned int index; - struct cpufreq_freqs freqs; - - if (cpufreq_frequency_table_target(policy, bf537_freq_table, target_freq, relation, &index)) - return -EINVAL; - - cclk_mhz = bf537_freq_table[index].frequency; - vco_mhz = bf537_freq_table[index].index; - - dpmc_fops.ioctl(NULL, NULL, IOCTL_CHANGE_FREQUENCY, &vco_mhz); - freqs.old = bf537_getfreq(0); - freqs.new = cclk_mhz; - freqs.cpu = 0; - - pr_debug("cclk begin change to cclk %d,vco=%d,index=%d,target=%d,oldfreq=%d\n", - cclk_mhz, vco_mhz, index, target_freq, freqs.old); - - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - local_irq_save(flags); - dpmc_fops.ioctl(NULL, NULL, IOCTL_SET_CCLK, &cclk_mhz); - local_irq_restore(flags); - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - - vco_mhz = get_vco(); - cclk_mhz = get_cclk(); - return 0; -} - -/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on - * this platform, anyway. - */ -static int bf537_verify_speed(struct cpufreq_policy *policy) -{ - return cpufreq_frequency_table_verify(policy, &bf537_freq_table); -} - -static int __init __bf537_cpu_init(struct cpufreq_policy *policy) -{ - if (policy->cpu != 0) - return -EINVAL; - - policy->governor = CPUFREQ_DEFAULT_GOVERNOR; - - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; - /*Now ,only support one cpu */ - policy->cur = bf537_getfreq(0); - cpufreq_frequency_table_get_attr(bf537_freq_table, policy->cpu); - return cpufreq_frequency_table_cpuinfo(policy, bf537_freq_table); -} - -static struct freq_attr *bf537_freq_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static struct cpufreq_driver bf537_driver = { - .verify = bf537_verify_speed, - .target = bf537_target, - .get = bf537_getfreq, - .init = __bf537_cpu_init, - .name = "bf537", - .owner = THIS_MODULE, - .attr = bf537_freq_attr, -}; - -static int __init bf537_cpu_init(void) -{ - return cpufreq_register_driver(&bf537_driver); -} - -static void __exit bf537_cpu_exit(void) -{ - cpufreq_unregister_driver(&bf537_driver); -} - -MODULE_AUTHOR("Mickael Kang"); -MODULE_DESCRIPTION("cpufreq driver for BF537 CPU"); -MODULE_LICENSE("GPL"); - -module_init(bf537_cpu_init); -module_exit(bf537_cpu_exit); |