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| author |   Langsdorf, Mark <mark.langsdorf@amd.com> | 2005-11-29 14:18:03 -0600 |
|---|---|---|
| committer |   Dave Jones <davej@redhat.com> | 2005-11-29 12:46:07 -0800 |
| commit | 019a61b99338d0ac05de25317b85da88e7ec4b35 (patch) | |
| tree | 51b3ed2180547ea582a43777244e11f84dd66e4f /arch/i386/kernel/cpu/cpufreq/powernow-k8.c | |
| parent | [CPUFREQ] Improve Error reporting in powernow-k8 (diff) | |
| download | linux-dev-019a61b99338d0ac05de25317b85da88e7ec4b35.tar.xz linux-dev-019a61b99338d0ac05de25317b85da88e7ec4b35.zip | |
[PATCH] Support 100 MHz frequency transitions
Future versions of the Opteron processor may support
frequency transitions of 100 MHz, instead of the=20
current 200 MHz. This patch enables the powernow-k8
driver to transition to an odd FID code, indicating
a multiple of 100 MHz frequency.
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'arch/i386/kernel/cpu/cpufreq/powernow-k8.c')
| -rw-r--r-- | arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c index 349782736808..a342b32c0843 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c @@ -45,7 +45,7 @@ #define PFX "powernow-k8: " #define BFX PFX "BIOS error: " -#define VERSION "version 1.50.5" +#define VERSION "version 1.60.0" #include "powernow-k8.h" /* serialize freq changes */ @@ -336,7 +336,7 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, u32 reqvid /* Phase 2 - core frequency transition */ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid) { - u32 vcoreqfid, vcocurrfid, vcofiddiff, savevid = data->currvid; + u32 vcoreqfid, vcocurrfid, vcofiddiff, fid_interval, savevid = data->currvid; if ((reqfid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) { printk(KERN_ERR PFX "ph2: illegal lo-lo transition 0x%x 0x%x\n", @@ -359,9 +359,11 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid) : vcoreqfid - vcocurrfid; while (vcofiddiff > 2) { + (data->currfid & 1) ? (fid_interval = 1) : (fid_interval = 2); + if (reqfid > data->currfid) { if (data->currfid > LO_FID_TABLE_TOP) { - if (write_new_fid(data, data->currfid + 2)) { + if (write_new_fid(data, data->currfid + fid_interval)) { return 1; } } else { @@ -371,7 +373,7 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid) } } } else { - if (write_new_fid(data, data->currfid - 2)) + if (write_new_fid(data, data->currfid - fid_interval)) return 1; } @@ -474,7 +476,7 @@ static int check_supported_cpu(unsigned int cpu) eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) || ((eax & CPUID_XFAM) != CPUID_XFAM_K8) || - ((eax & CPUID_XMOD) > CPUID_XMOD_REV_F)) { + ((eax & CPUID_XMOD) > CPUID_XMOD_REV_G)) { printk(KERN_INFO PFX "Processor cpuid %x not supported\n", eax); goto out; } @@ -521,10 +523,6 @@ static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst, u8 printk(KERN_ERR BFX "maxfid exceeded with pstate %d\n", j); return -ENODEV; } - if (pst[j].fid & 1) { - printk(KERN_ERR BFX "fid invalid - %d : 0x%x\n", j, pst[j].fid); - return -EINVAL; - } if (j && (pst[j].fid < HI_FID_TABLE_BOTTOM)) { /* Only first fid is allowed to be in "low" range */ printk(KERN_ERR BFX "two low fids - %d : 0x%x\n", j, pst[j].fid); @@ -1177,4 +1175,3 @@ MODULE_LICENSE("GPL"); late_initcall(powernowk8_init); module_exit(powernowk8_exit); - |