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authorDave Jones <davej@redhat.com>2011-05-20 02:51:07 +0400
committerDave Jones <davej@redhat.com>2011-05-20 02:51:07 +0400
commitbb0a56ecc4ba2a3db1b6ea6949c309886e3447d3 (patch)
tree680b1307d7d9c1a188b7483875f7a3287d8b51a0 /arch/x86/kernel/cpu/cpufreq/sc520_freq.c
parent1a8e1463a49aaa452da1cefe184a00d4df47f1ef (diff)
downloadlinux-bb0a56ecc4ba2a3db1b6ea6949c309886e3447d3.tar.xz
[CPUFREQ] Move x86 drivers to drivers/cpufreq/
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/sc520_freq.c')
-rw-r--r--arch/x86/kernel/cpu/cpufreq/sc520_freq.c192
1 files changed, 0 insertions, 192 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c b/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
deleted file mode 100644
index 1e205e6b1727..000000000000
--- a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * sc520_freq.c: cpufreq driver for the AMD Elan sc520
- *
- * Copyright (C) 2005 Sean Young <sean@mess.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.
- *
- * Based on elanfreq.c
- *
- * 2005-03-30: - initial revision
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-
-#include <linux/delay.h>
-#include <linux/cpufreq.h>
-#include <linux/timex.h>
-#include <linux/io.h>
-
-#include <asm/msr.h>
-
-#define MMCR_BASE 0xfffef000 /* The default base address */
-#define OFFS_CPUCTL 0x2 /* CPU Control Register */
-
-static __u8 __iomem *cpuctl;
-
-#define PFX "sc520_freq: "
-
-static struct cpufreq_frequency_table sc520_freq_table[] = {
- {0x01, 100000},
- {0x02, 133000},
- {0, CPUFREQ_TABLE_END},
-};
-
-static unsigned int sc520_freq_get_cpu_frequency(unsigned int cpu)
-{
- u8 clockspeed_reg = *cpuctl;
-
- switch (clockspeed_reg & 0x03) {
- default:
- printk(KERN_ERR PFX "error: cpuctl register has unexpected "
- "value %02x\n", clockspeed_reg);
- case 0x01:
- return 100000;
- case 0x02:
- return 133000;
- }
-}
-
-static void sc520_freq_set_cpu_state(unsigned int state)
-{
-
- struct cpufreq_freqs freqs;
- u8 clockspeed_reg;
-
- freqs.old = sc520_freq_get_cpu_frequency(0);
- freqs.new = sc520_freq_table[state].frequency;
- freqs.cpu = 0; /* AMD Elan is UP */
-
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
- pr_debug("attempting to set frequency to %i kHz\n",
- sc520_freq_table[state].frequency);
-
- local_irq_disable();
-
- clockspeed_reg = *cpuctl & ~0x03;
- *cpuctl = clockspeed_reg | sc520_freq_table[state].index;
-
- local_irq_enable();
-
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-};
-
-static int sc520_freq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, &sc520_freq_table[0]);
-}
-
-static int sc520_freq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int newstate = 0;
-
- if (cpufreq_frequency_table_target(policy, sc520_freq_table,
- target_freq, relation, &newstate))
- return -EINVAL;
-
- sc520_freq_set_cpu_state(newstate);
-
- return 0;
-}
-
-
-/*
- * Module init and exit code
- */
-
-static int sc520_freq_cpu_init(struct cpufreq_policy *policy)
-{
- struct cpuinfo_x86 *c = &cpu_data(0);
- int result;
-
- /* capability check */
- if (c->x86_vendor != X86_VENDOR_AMD ||
- c->x86 != 4 || c->x86_model != 9)
- return -ENODEV;
-
- /* cpuinfo and default policy values */
- policy->cpuinfo.transition_latency = 1000000; /* 1ms */
- policy->cur = sc520_freq_get_cpu_frequency(0);
-
- result = cpufreq_frequency_table_cpuinfo(policy, sc520_freq_table);
- if (result)
- return result;
-
- cpufreq_frequency_table_get_attr(sc520_freq_table, policy->cpu);
-
- return 0;
-}
-
-
-static int sc520_freq_cpu_exit(struct cpufreq_policy *policy)
-{
- cpufreq_frequency_table_put_attr(policy->cpu);
- return 0;
-}
-
-
-static struct freq_attr *sc520_freq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-
-static struct cpufreq_driver sc520_freq_driver = {
- .get = sc520_freq_get_cpu_frequency,
- .verify = sc520_freq_verify,
- .target = sc520_freq_target,
- .init = sc520_freq_cpu_init,
- .exit = sc520_freq_cpu_exit,
- .name = "sc520_freq",
- .owner = THIS_MODULE,
- .attr = sc520_freq_attr,
-};
-
-
-static int __init sc520_freq_init(void)
-{
- struct cpuinfo_x86 *c = &cpu_data(0);
- int err;
-
- /* Test if we have the right hardware */
- if (c->x86_vendor != X86_VENDOR_AMD ||
- c->x86 != 4 || c->x86_model != 9) {
- pr_debug("no Elan SC520 processor found!\n");
- return -ENODEV;
- }
- cpuctl = ioremap((unsigned long)(MMCR_BASE + OFFS_CPUCTL), 1);
- if (!cpuctl) {
- printk(KERN_ERR "sc520_freq: error: failed to remap memory\n");
- return -ENOMEM;
- }
-
- err = cpufreq_register_driver(&sc520_freq_driver);
- if (err)
- iounmap(cpuctl);
-
- return err;
-}
-
-
-static void __exit sc520_freq_exit(void)
-{
- cpufreq_unregister_driver(&sc520_freq_driver);
- iounmap(cpuctl);
-}
-
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Sean Young <sean@mess.org>");
-MODULE_DESCRIPTION("cpufreq driver for AMD's Elan sc520 CPU");
-
-module_init(sc520_freq_init);
-module_exit(sc520_freq_exit);
-