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Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/powernow-k6.c')
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k6.c41
1 files changed, 20 insertions, 21 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
index eb9b62b0830c..b5ced806a316 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
@@ -15,12 +15,11 @@
15#include <linux/slab.h> 15#include <linux/slab.h>
16 16
17#include <asm/msr.h> 17#include <asm/msr.h>
18#include <asm/timex.h> 18#include <linux/timex.h>
19#include <asm/io.h> 19#include <linux/io.h>
20 20
21 21#define POWERNOW_IOPORT 0xfff0 /* it doesn't matter where, as long
22#define POWERNOW_IOPORT 0xfff0 /* it doesn't matter where, as long 22 as it is unused */
23 as it is unused */
24 23
25static unsigned int busfreq; /* FSB, in 10 kHz */ 24static unsigned int busfreq; /* FSB, in 10 kHz */
26static unsigned int max_multiplier; 25static unsigned int max_multiplier;
@@ -53,7 +52,7 @@ static int powernow_k6_get_cpu_multiplier(void)
53 52
54 msrval = POWERNOW_IOPORT + 0x1; 53 msrval = POWERNOW_IOPORT + 0x1;
55 wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */ 54 wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
56 invalue=inl(POWERNOW_IOPORT + 0x8); 55 invalue = inl(POWERNOW_IOPORT + 0x8);
57 msrval = POWERNOW_IOPORT + 0x0; 56 msrval = POWERNOW_IOPORT + 0x0;
58 wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */ 57 wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
59 58
@@ -67,9 +66,9 @@ static int powernow_k6_get_cpu_multiplier(void)
67 * 66 *
68 * Tries to change the PowerNow! multiplier 67 * Tries to change the PowerNow! multiplier
69 */ 68 */
70static void powernow_k6_set_state (unsigned int best_i) 69static void powernow_k6_set_state(unsigned int best_i)
71{ 70{
72 unsigned long outvalue=0, invalue=0; 71 unsigned long outvalue = 0, invalue = 0;
73 unsigned long msrval; 72 unsigned long msrval;
74 struct cpufreq_freqs freqs; 73 struct cpufreq_freqs freqs;
75 74
@@ -90,10 +89,10 @@ static void powernow_k6_set_state (unsigned int best_i)
90 89
91 msrval = POWERNOW_IOPORT + 0x1; 90 msrval = POWERNOW_IOPORT + 0x1;
92 wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */ 91 wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
93 invalue=inl(POWERNOW_IOPORT + 0x8); 92 invalue = inl(POWERNOW_IOPORT + 0x8);
94 invalue = invalue & 0xf; 93 invalue = invalue & 0xf;
95 outvalue = outvalue | invalue; 94 outvalue = outvalue | invalue;
96 outl(outvalue ,(POWERNOW_IOPORT + 0x8)); 95 outl(outvalue , (POWERNOW_IOPORT + 0x8));
97 msrval = POWERNOW_IOPORT + 0x0; 96 msrval = POWERNOW_IOPORT + 0x0;
98 wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */ 97 wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
99 98
@@ -124,7 +123,7 @@ static int powernow_k6_verify(struct cpufreq_policy *policy)
124 * 123 *
125 * sets a new CPUFreq policy 124 * sets a new CPUFreq policy
126 */ 125 */
127static int powernow_k6_target (struct cpufreq_policy *policy, 126static int powernow_k6_target(struct cpufreq_policy *policy,
128 unsigned int target_freq, 127 unsigned int target_freq,
129 unsigned int relation) 128 unsigned int relation)
130{ 129{
@@ -152,7 +151,7 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
152 busfreq = cpu_khz / max_multiplier; 151 busfreq = cpu_khz / max_multiplier;
153 152
154 /* table init */ 153 /* table init */
155 for (i=0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) { 154 for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
156 if (clock_ratio[i].index > max_multiplier) 155 if (clock_ratio[i].index > max_multiplier)
157 clock_ratio[i].frequency = CPUFREQ_ENTRY_INVALID; 156 clock_ratio[i].frequency = CPUFREQ_ENTRY_INVALID;
158 else 157 else
@@ -165,7 +164,7 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
165 164
166 result = cpufreq_frequency_table_cpuinfo(policy, clock_ratio); 165 result = cpufreq_frequency_table_cpuinfo(policy, clock_ratio);
167 if (result) 166 if (result)
168 return (result); 167 return result;
169 168
170 cpufreq_frequency_table_get_attr(clock_ratio, policy->cpu); 169 cpufreq_frequency_table_get_attr(clock_ratio, policy->cpu);
171 170
@@ -176,8 +175,8 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
176static int powernow_k6_cpu_exit(struct cpufreq_policy *policy) 175static int powernow_k6_cpu_exit(struct cpufreq_policy *policy)
177{ 176{
178 unsigned int i; 177 unsigned int i;
179 for (i=0; i<8; i++) { 178 for (i = 0; i < 8; i++) {
180 if (i==max_multiplier) 179 if (i == max_multiplier)
181 powernow_k6_set_state(i); 180 powernow_k6_set_state(i);
182 } 181 }
183 cpufreq_frequency_table_put_attr(policy->cpu); 182 cpufreq_frequency_table_put_attr(policy->cpu);
@@ -189,7 +188,7 @@ static unsigned int powernow_k6_get(unsigned int cpu)
189 return busfreq * powernow_k6_get_cpu_multiplier(); 188 return busfreq * powernow_k6_get_cpu_multiplier();
190} 189}
191 190
192static struct freq_attr* powernow_k6_attr[] = { 191static struct freq_attr *powernow_k6_attr[] = {
193 &cpufreq_freq_attr_scaling_available_freqs, 192 &cpufreq_freq_attr_scaling_available_freqs,
194 NULL, 193 NULL,
195}; 194};
@@ -227,7 +226,7 @@ static int __init powernow_k6_init(void)
227 } 226 }
228 227
229 if (cpufreq_register_driver(&powernow_k6_driver)) { 228 if (cpufreq_register_driver(&powernow_k6_driver)) {
230 release_region (POWERNOW_IOPORT, 16); 229 release_region(POWERNOW_IOPORT, 16);
231 return -EINVAL; 230 return -EINVAL;
232 } 231 }
233 232
@@ -243,13 +242,13 @@ static int __init powernow_k6_init(void)
243static void __exit powernow_k6_exit(void) 242static void __exit powernow_k6_exit(void)
244{ 243{
245 cpufreq_unregister_driver(&powernow_k6_driver); 244 cpufreq_unregister_driver(&powernow_k6_driver);
246 release_region (POWERNOW_IOPORT, 16); 245 release_region(POWERNOW_IOPORT, 16);
247} 246}
248 247
249 248
250MODULE_AUTHOR ("Arjan van de Ven <arjanv@redhat.com>, Dave Jones <davej@codemonkey.org.uk>, Dominik Brodowski <linux@brodo.de>"); 249MODULE_AUTHOR("Arjan van de Ven <arjanv@redhat.com>, Dave Jones <davej@codemonkey.org.uk>, Dominik Brodowski <linux@brodo.de>");
251MODULE_DESCRIPTION ("PowerNow! driver for AMD K6-2+ / K6-3+ processors."); 250MODULE_DESCRIPTION("PowerNow! driver for AMD K6-2+ / K6-3+ processors.");
252MODULE_LICENSE ("GPL"); 251MODULE_LICENSE("GPL");
253 252
254module_init(powernow_k6_init); 253module_init(powernow_k6_init);
255module_exit(powernow_k6_exit); 254module_exit(powernow_k6_exit);