drm/radeon/kms: fix channel_remap setup (v2)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / cpufreq / speedstep-lib.h
blob70d9cea1219df63eb37db0b325a03a483f842d7d
1 /*
2 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
4 * Licensed under the terms of the GNU GPL License version 2.
6 * Library for common functions for Intel SpeedStep v.1 and v.2 support
8 * BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous*
9 */
13 /* processors */
14 enum speedstep_processor {
15 SPEEDSTEP_CPU_PIII_C_EARLY = 0x00000001, /* Coppermine core */
16 SPEEDSTEP_CPU_PIII_C = 0x00000002, /* Coppermine core */
17 SPEEDSTEP_CPU_PIII_T = 0x00000003, /* Tualatin core */
18 SPEEDSTEP_CPU_P4M = 0x00000004, /* P4-M */
19 /* the following processors are not speedstep-capable and are not auto-detected
20 * in speedstep_detect_processor(). However, their speed can be detected using
21 * the speedstep_get_frequency() call. */
22 SPEEDSTEP_CPU_PM = 0xFFFFFF03, /* Pentium M */
23 SPEEDSTEP_CPU_P4D = 0xFFFFFF04, /* desktop P4 */
24 SPEEDSTEP_CPU_PCORE = 0xFFFFFF05, /* Core */
27 /* speedstep states -- only two of them */
29 #define SPEEDSTEP_HIGH 0x00000000
30 #define SPEEDSTEP_LOW 0x00000001
33 /* detect a speedstep-capable processor */
34 extern enum speedstep_processor speedstep_detect_processor(void);
36 /* detect the current speed (in khz) of the processor */
37 extern unsigned int speedstep_get_frequency(enum speedstep_processor processor);
40 /* detect the low and high speeds of the processor. The callback
41 * set_state"'s first argument is either SPEEDSTEP_HIGH or
42 * SPEEDSTEP_LOW; the second argument is zero so that no
43 * cpufreq_notify_transition calls are initiated.
45 extern unsigned int speedstep_get_freqs(enum speedstep_processor processor,
46 unsigned int *low_speed,
47 unsigned int *high_speed,
48 unsigned int *transition_latency,
49 void (*set_state) (unsigned int state));