Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq

* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Don't take semaphore in cpufreq_quick_get()
  [CPUFREQ] Support different families in fid/did to frequency conversion
  [CPUFREQ] cpufreq_stats: misc cpuinit section annotations
  [CPUFREQ] implement !CONFIG_CPU_FREQ stub for  cpufreq_unregister_notifier()
  [CPUFREQ] mark hotplug notifier callback as __cpuinit
  [CPUFREQ] Only check for transition latency on problematic governors (kconfig fix)
  [CPUFREQ] allow ondemand and conservative cpufreq governors to be used as default
  [CPUFREQ] move policy's governor initialisation out of low-level drivers into cpufreq core
  [CPUFREQ] Longhaul - Add support for PM133 northbridge
  [CPUFREQ] x86: use num_online_nodes to get physical cpus numbers for

diff --git a/arch/arm/mach-imx/cpufreq.c b/arch/arm/mach-imx/cpufreq.c
index 467d899fbe755eab9e2dc1860d4dff3dfa423762..e548ba74a4d2a17bf4537748f92edc807e859df1 100644 (file)
--- a/arch/arm/mach-imx/cpufreq.c
+++ b/arch/arm/mach-imx/cpufreq.c
@@ -269,7 +269,6 @@ static int __init imx_cpufreq_driver_init(struct cpufreq_policy *policy)
                return -EINVAL;
 
        policy->cur = policy->min = policy->max = imx_get_speed(0);
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.min_freq = 8000;
        policy->cpuinfo.max_freq = 200000;
         /* Manual states, that PLL stabilizes in two CLK32 periods */

diff --git a/arch/arm/mach-sa1100/cpu-sa1110.c b/arch/arm/mach-sa1100/cpu-sa1110.c
index 78f4c1346044f64a1282294332e13d6e78d3e9cd..36b47ff5af11ddf5dccadba8170baee881a2d133 100644 (file)
--- a/arch/arm/mach-sa1100/cpu-sa1110.c
+++ b/arch/arm/mach-sa1100/cpu-sa1110.c
@@ -331,7 +331,6 @@ static int __init sa1110_cpu_init(struct cpufreq_policy *policy)
        if (policy->cpu != 0)
                return -EINVAL;
        policy->cur = policy->min = policy->max = sa11x0_getspeed(0);
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.min_freq = 59000;
        policy->cpuinfo.max_freq = 287000;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

diff --git a/arch/arm/plat-omap/cpu-omap.c b/arch/arm/plat-omap/cpu-omap.c
index a0c71dca237330aac55e15bf24221b39e1962128..c0d63b0c61c9c5a54a11a298ea0f8d7334444e58 100644 (file)
--- a/arch/arm/plat-omap/cpu-omap.c
+++ b/arch/arm/plat-omap/cpu-omap.c
@@ -108,7 +108,6 @@ static int __init omap_cpu_init(struct cpufreq_policy *policy)
        if (policy->cpu != 0)
                return -EINVAL;
        policy->cur = policy->min = policy->max = omap_getspeed(0);
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.min_freq = clk_round_rate(mpu_clk, 0) / 1000;
        policy->cpuinfo.max_freq = clk_round_rate(mpu_clk, VERY_HI_RATE) / 1000;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

diff --git a/arch/blackfin/mach-bf533/cpu.c b/arch/blackfin/mach-bf533/cpu.c
index 6fd9cfd0a31bd1a330f89a1c803ca749abffa67b..b7a0e0fbd9af9f32bf618c3b98b6a46eb9608ec1 100644 (file)
--- a/arch/blackfin/mach-bf533/cpu.c
+++ b/arch/blackfin/mach-bf533/cpu.c
@@ -118,8 +118,6 @@ static int __init __bf533_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 = bf533_getfreq(0);

diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
index 8c6ec7070844d7a7826881ccf15b4ca5079d5654..b8498ea6206800b613f753cc75db7c84e71b9e93 100644 (file)
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
@@ -321,8 +321,6 @@ acpi_cpufreq_cpu_init (
                            data->acpi_data.states[i].transition_latency * 1000;
                }
        }
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
        policy->cur = processor_get_freq(data, policy->cpu);
 
        /* table init */

diff --git a/arch/powerpc/platforms/cell/cbe_cpufreq.c b/arch/powerpc/platforms/cell/cbe_cpufreq.c
index 901236fa0f07bed62c1e63c191a4b5debd90fcd4..5123e9d4164b7c1c6c65898ed20dfb0b23f0cddd 100644 (file)
--- a/arch/powerpc/platforms/cell/cbe_cpufreq.c
+++ b/arch/powerpc/platforms/cell/cbe_cpufreq.c
@@ -107,8 +107,6 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
                pr_debug("%d: %d\n", i, cbe_freqs[i].frequency);
        }
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
        /* if DEBUG is enabled set_pmode() measures the latency
         * of a transition */
        policy->cpuinfo.transition_latency = 25000;

diff --git a/arch/powerpc/platforms/pasemi/cpufreq.c b/arch/powerpc/platforms/pasemi/cpufreq.c
index 3ae083851b01043383bda66a1518e737c8144c56..1cfb8b0c8fecd512f6b26564138a9df52b148c17 100644 (file)
--- a/arch/powerpc/platforms/pasemi/cpufreq.c
+++ b/arch/powerpc/platforms/pasemi/cpufreq.c
@@ -195,8 +195,6 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
                pr_debug("%d: %d\n", i, pas_freqs[i].frequency);
        }
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
        policy->cpuinfo.transition_latency = get_gizmo_latency();
 
        cur_astate = get_cur_astate(policy->cpu);

diff --git a/arch/powerpc/platforms/powermac/cpufreq_32.c b/arch/powerpc/platforms/powermac/cpufreq_32.c
index 1fe35dab0e9eb7d519569ef37265956d0b85613d..c04abcc28a7a88060a9cb6be50922c9ef41bd4a9 100644 (file)
--- a/arch/powerpc/platforms/powermac/cpufreq_32.c
+++ b/arch/powerpc/platforms/powermac/cpufreq_32.c
@@ -410,7 +410,6 @@ static int pmac_cpufreq_cpu_init(struct cpufreq_policy *policy)
        if (policy->cpu != 0)
                return -ENODEV;
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency      = CPUFREQ_ETERNAL;
        policy->cur = cur_freq;
 

diff --git a/arch/powerpc/platforms/powermac/cpufreq_64.c b/arch/powerpc/platforms/powermac/cpufreq_64.c
index 00f50298c342aad55c982687e03bddbde0d731cb..4dfb4bc242b5cc2c360530085a36681506a41d10 100644 (file)
--- a/arch/powerpc/platforms/powermac/cpufreq_64.c
+++ b/arch/powerpc/platforms/powermac/cpufreq_64.c
@@ -357,7 +357,6 @@ static unsigned int g5_cpufreq_get_speed(unsigned int cpu)
 
 static int g5_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
        policy->cur = g5_cpu_freqs[g5_query_freq()].frequency;
        /* secondary CPUs are tied to the primary one by the

diff --git a/arch/sh/kernel/cpufreq.c b/arch/sh/kernel/cpufreq.c
index e61890217c5012b006fa8437975d4fe55a0fe108..71d1c427b9079771ecf2528a02ddf0559aef2232 100644 (file)
--- a/arch/sh/kernel/cpufreq.c
+++ b/arch/sh/kernel/cpufreq.c
@@ -93,7 +93,6 @@ static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy)
        policy->cpuinfo.max_freq = (clk_round_rate(cpuclk, ~0UL) + 500) / 1000;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
 
-       policy->governor        = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cur             = sh_cpufreq_get(policy->cpu);
        policy->min             = policy->cpuinfo.min_freq;
        policy->max             = policy->cpuinfo.max_freq;

diff --git a/arch/sparc64/kernel/us2e_cpufreq.c b/arch/sparc64/kernel/us2e_cpufreq.c
index 1f83fe6a82d628bfbacf63795799b401d4812903..791c15138f3a4abf3cb368e12041fcd7f304842c 100644 (file)
--- a/arch/sparc64/kernel/us2e_cpufreq.c
+++ b/arch/sparc64/kernel/us2e_cpufreq.c
@@ -326,7 +326,6 @@ static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
        table[2].index = 5;
        table[3].frequency = CPUFREQ_TABLE_END;
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = 0;
        policy->cur = clock_tick;
 

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index b6434a7ef8b2b311f76aad4307f642e64746dd8b..ffd01e5dcb52c2cacf61f8dee9cf2f450543b8a7 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -646,7 +646,6 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
                        policy->cpuinfo.transition_latency =
                            perf->states[i].transition_latency * 1000;
        }
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 
        data->max_freq = perf->states[0].core_frequency * 1000;
        /* table init */

diff --git a/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c b/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c
index 66acd5039918350d16819cbf41457053f021fe56..32f0bda3fc953a4568c194b13773f5a70ba22c69 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c
+++ b/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c
@@ -363,7 +363,6 @@ static int nforce2_cpu_init(struct cpufreq_policy *policy)
        policy->cur = nforce2_get(policy->cpu);
        policy->min = policy->cpuinfo.min_freq;
        policy->max = policy->cpuinfo.max_freq;
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 
        return 0;
 }

diff --git a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
index f43d98e11cc72bbe72bc66a5b9cbcaac0704e2d7..c11baaf9f2b403f6624e1fa0d4fd5756491d8383 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
+++ b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
@@ -253,7 +253,6 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
                f_table[k].frequency = CPUFREQ_TABLE_END;
        }
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = 140000; /* 844mV -> 700mV in ns */
        policy->cur = fsb * current_multiplier;
 

diff --git a/arch/x86/kernel/cpu/cpufreq/elanfreq.c b/arch/x86/kernel/cpu/cpufreq/elanfreq.c
index f317276afa7af179906f2035705bcf66a91d1824..1e7ae7dafcf6a50921d1271347e2f522ad13ad2b 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/elanfreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/elanfreq.c
@@ -219,7 +219,6 @@ static int elanfreq_cpu_init(struct cpufreq_policy *policy)
        }
 
        /* cpuinfo and default policy values */
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
        policy->cur = elanfreq_get_cpu_frequency(0);
 

diff --git a/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c b/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
index 461dabc4e4959d23a7b5411d109b1a239a8c3872..ed2bda127c44b8734fbc88af3bc394ed95290ff9 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
@@ -420,7 +420,6 @@ static int cpufreq_gx_cpu_init(struct cpufreq_policy *policy)
                policy->min = maxfreq / POLICY_MIN_DIV;
        policy->max = maxfreq;
        policy->cur = curfreq;
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.min_freq = maxfreq / max_duration;
        policy->cpuinfo.max_freq = maxfreq;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

diff --git a/arch/x86/kernel/cpu/cpufreq/longhaul.c b/arch/x86/kernel/cpu/cpufreq/longhaul.c
index f0cce3c2dc3a4fe33916f2c1ff5c34bae77237e6..5045f5d583c81954fa7123df8697188a39012583 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/x86/kernel/cpu/cpufreq/longhaul.c
@@ -710,6 +710,10 @@ static int enable_arbiter_disable(void)
        reg = 0x78;
        dev = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8601_0,
                             NULL);
+       /* Find PM133/VT8605 host bridge */
+       if (dev == NULL)
+               dev = pci_get_device(PCI_VENDOR_ID_VIA,
+                                    PCI_DEVICE_ID_VIA_8605_0, NULL);
        /* Find CLE266 host bridge */
        if (dev == NULL) {
                reg = 0x76;
@@ -918,7 +922,6 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
        if ((longhaul_version != TYPE_LONGHAUL_V1) && (scale_voltage != 0))
                longhaul_setup_voltagescaling();
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = 200000;    /* nsec */
        policy->cur = calc_speed(longhaul_get_cpu_mult());
 

diff --git a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
index 4c76b511e1944d16ed420343cb57db0dafb1f943..8eb414b906d29f7e20f93fdc5d0e6e0edfe21da1 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
@@ -229,7 +229,6 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
        cpufreq_frequency_table_get_attr(p4clockmod_table, policy->cpu);
 
        /* cpuinfo and default policy values */
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = 1000000; /* assumed */
        policy->cur = stock_freq;
 

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
index f89524051e4a3aa78012fd16a4179976764dc7ec..6d02853393175305e8f749b99a8500379d1353d2 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
@@ -160,7 +160,6 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
        }
 
        /* cpuinfo and default policy values */
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
        policy->cur = busfreq * max_multiplier;
 

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
index ca3e1d341889dfc00964fd2d052e13d9108d8562..7decd6a50ffa6f44a83e36dfe443522a923ad15b 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
@@ -637,8 +637,6 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
        printk (KERN_INFO PFX "Minimum speed %d MHz. Maximum speed %d MHz.\n",
                                minimum_speed/1000, maximum_speed/1000);
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
        policy->cpuinfo.transition_latency = cpufreq_scale(2000000UL, fsb, latency);
 
        policy->cur = powernow_get(0);

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 34ed53a067307d78166019961f5e431c26f83c1f..b273b69cfddf0532d18b4db6646fafd077cdc31e 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -76,7 +76,10 @@ static u32 find_khz_freq_from_fid(u32 fid)
 /* Return a frequency in MHz, given an input fid and did */
 static u32 find_freq_from_fiddid(u32 fid, u32 did)
 {
-       return 100 * (fid + 0x10) >> did;
+       if (current_cpu_data.x86 == 0x10)
+               return 100 * (fid + 0x10) >> did;
+       else
+               return 100 * (fid + 0x8) >> did;
 }
 
 static u32 find_khz_freq_from_fiddid(u32 fid, u32 did)
@@ -1208,7 +1211,6 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
        /* run on any CPU again */
        set_cpus_allowed(current, oldmask);
 
-       pol->governor = CPUFREQ_DEFAULT_GOVERNOR;
        if (cpu_family == CPU_HW_PSTATE)
                pol->cpus = cpumask_of_cpu(pol->cpu);
        else
@@ -1325,21 +1327,16 @@ static struct cpufreq_driver cpufreq_amd64_driver = {
 static int __cpuinit powernowk8_init(void)
 {
        unsigned int i, supported_cpus = 0;
-       unsigned int booted_cores = 1;
 
        for_each_online_cpu(i) {
                if (check_supported_cpu(i))
                        supported_cpus++;
        }
 
-#ifdef CONFIG_SMP
-       booted_cores = cpu_data[0].booted_cores;
-#endif
-
        if (supported_cpus == num_online_cpus()) {
                printk(KERN_INFO PFX "Found %d %s "
                        "processors (%d cpu cores) (" VERSION ")\n",
-                       supported_cpus/booted_cores,
+                       num_online_nodes(),
                        boot_cpu_data.x86_model_id, supported_cpus);
                return cpufreq_register_driver(&cpufreq_amd64_driver);
        }

diff --git a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c b/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
index b8fb4b521c62806a2ec8e3134a281590e0dc8b7a..d9f3e90a7ae080c9ba1e316c56ccb3afe6022231 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
+++ b/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
@@ -111,7 +111,6 @@ static int sc520_freq_cpu_init(struct cpufreq_policy *policy)
                return -ENODEV;
 
        /* cpuinfo and default policy values */
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = 1000000; /* 1ms */
        policy->cur = sc520_freq_get_cpu_frequency(0);
 

diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
index 6c5dc2c85aeb99241ef85fac0cd20bfcc1e522a2..811d47438546974e41651794cecf380a26e53c33 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -393,7 +393,6 @@ static int centrino_cpu_init(struct cpufreq_policy *policy)
 
        freq = get_cur_freq(policy->cpu);
 
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = 10000; /* 10uS transition latency */
        policy->cur = freq;
 

diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
index a5b2346faf1fd2bba8d01bcbedb2253f4d3529cb..36685e8f7be1171cf260d75646be0dff7f00a472 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
@@ -348,7 +348,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
                (speed / 1000));
 
        /* cpuinfo and default policy values */
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cur = speed;
 
        result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);

diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c b/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
index e1c509aa3054ef5dc7f453c3f665b5dcf1cdfa8e..f2b5a621d27b39e4ece42418719655406b220e17 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
@@ -290,7 +290,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
                (speed / 1000));
 
        /* cpuinfo and default policy values */
-       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
        policy->cur = speed;
 

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 993fa7b89253404adbd4cba3eb900dfdcd8f2393..721f86f4f0085d3a4caf11c7365ae18643825c84 100644 (file)
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -56,10 +56,6 @@ config CPU_FREQ_STAT_DETAILS
 
          If in doubt, say N.
 
-# Note that it is not currently possible to set the other governors (such as ondemand)
-# as the default, since if they fail to initialise, cpufreq will be
-# left in an undefined state.
-
 choice
        prompt "Default CPUFreq governor"
        default CPU_FREQ_DEFAULT_GOV_USERSPACE if CPU_FREQ_SA1100 || CPU_FREQ_SA1110
@@ -85,6 +81,29 @@ config CPU_FREQ_DEFAULT_GOV_USERSPACE
          program shall be able to set the CPU dynamically without having
          to enable the userspace governor manually.
 
+config CPU_FREQ_DEFAULT_GOV_ONDEMAND
+       bool "ondemand"
+       select CPU_FREQ_GOV_ONDEMAND
+       select CPU_FREQ_GOV_PERFORMANCE
+       help
+         Use the CPUFreq governor 'ondemand' as default. This allows
+         you to get a full dynamic frequency capable system by simply
+         loading your cpufreq low-level hardware driver.
+         Be aware that not all cpufreq drivers support the ondemand
+         governor. If unsure have a look at the help section of the
+         driver. Fallback governor will be the performance governor.
+
+config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
+       bool "conservative"
+       select CPU_FREQ_GOV_CONSERVATIVE
+       select CPU_FREQ_GOV_PERFORMANCE
+       help
+         Use the CPUFreq governor 'conservative' as default. This allows
+         you to get a full dynamic frequency capable system by simply
+         loading your cpufreq low-level hardware driver.
+         Be aware that not all cpufreq drivers support the conservative
+         governor. If unsure have a look at the help section of the
+         driver. Fallback governor will be the performance governor.
 endchoice
 
 config CPU_FREQ_GOV_PERFORMANCE

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2f6a73c01b718318d583123f66aaa6c622dca6a0..f7b9d6fce1236738ba7861ac7f0b7c7c5b14b9eb 100644 (file)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -763,6 +763,8 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
        init_completion(&policy->kobj_unregister);
        INIT_WORK(&policy->update, handle_update);
 
+       /* Set governor before ->init, so that driver could check it */
+       policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
        /* call driver. From then on the cpufreq must be able
         * to accept all calls to ->verify and ->setpolicy for this CPU
         */
@@ -1109,12 +1111,7 @@ unsigned int cpufreq_quick_get(unsigned int cpu)
        unsigned int ret_freq = 0;
 
        if (policy) {
-               if (unlikely(lock_policy_rwsem_read(cpu)))
-                       return ret_freq;
-
                ret_freq = policy->cur;
-
-               unlock_policy_rwsem_read(cpu);
                cpufreq_cpu_put(policy);
        }
 
@@ -1483,6 +1480,31 @@ static int __cpufreq_governor(struct cpufreq_policy *policy,
 {
        int ret;
 
+       /* Only must be defined when default governor is known to have latency
+          restrictions, like e.g. conservative or ondemand.
+          That this is the case is already ensured in Kconfig
+       */
+#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
+       struct cpufreq_governor *gov = &cpufreq_gov_performance;
+#else
+       struct cpufreq_governor *gov = NULL;
+#endif
+
+       if (policy->governor->max_transition_latency &&
+           policy->cpuinfo.transition_latency >
+           policy->governor->max_transition_latency) {
+               if (!gov)
+                       return -EINVAL;
+               else {
+                       printk(KERN_WARNING "%s governor failed, too long"
+                              " transition latency of HW, fallback"
+                              " to %s governor\n",
+                              policy->governor->name,
+                              gov->name);
+                       policy->governor = gov;
+               }
+       }
+
        if (!try_module_get(policy->governor->owner))
                return -EINVAL;
 
@@ -1703,7 +1725,7 @@ int cpufreq_update_policy(unsigned int cpu)
 }
 EXPORT_SYMBOL(cpufreq_update_policy);
 
-static int cpufreq_cpu_callback(struct notifier_block *nfb,
+static int __cpuinit cpufreq_cpu_callback(struct notifier_block *nfb,
                                        unsigned long action, void *hcpu)
 {
        unsigned int cpu = (unsigned long)hcpu;

diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 26f440ccc3fb358e9525ecabee819ae52b7afa26..4bd33ce8a6f3398a0aa37995582e619c3b938590 100644 (file)
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -58,7 +58,7 @@ static unsigned int                           def_sampling_rate;
 #define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER   (1000)
 #define DEF_SAMPLING_DOWN_FACTOR               (1)
 #define MAX_SAMPLING_DOWN_FACTOR               (10)
-#define TRANSITION_LATENCY_LIMIT               (10 * 1000)
+#define TRANSITION_LATENCY_LIMIT               (10 * 1000 * 1000)
 
 static void do_dbs_timer(struct work_struct *work);
 
@@ -466,9 +466,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
                    (!policy->cur))
                        return -EINVAL;
 
-               if (policy->cpuinfo.transition_latency >
-                               (TRANSITION_LATENCY_LIMIT * 1000))
-                       return -EINVAL;
                if (this_dbs_info->enable) /* Already enabled */
                        break;
                 
@@ -551,15 +548,17 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
        return 0;
 }
 
-static struct cpufreq_governor cpufreq_gov_dbs = {
-       .name           = "conservative",
-       .governor       = cpufreq_governor_dbs,
-       .owner          = THIS_MODULE,
+struct cpufreq_governor cpufreq_gov_conservative = {
+       .name                   = "conservative",
+       .governor               = cpufreq_governor_dbs,
+       .max_transition_latency = TRANSITION_LATENCY_LIMIT,
+       .owner                  = THIS_MODULE,
 };
+EXPORT_SYMBOL(cpufreq_gov_conservative);
 
 static int __init cpufreq_gov_dbs_init(void)
 {
-       return cpufreq_register_governor(&cpufreq_gov_dbs);
+       return cpufreq_register_governor(&cpufreq_gov_conservative);
 }
 
 static void __exit cpufreq_gov_dbs_exit(void)
@@ -567,7 +566,7 @@ static void __exit cpufreq_gov_dbs_exit(void)
        /* Make sure that the scheduled work is indeed not running */
        flush_scheduled_work();
 
-       cpufreq_unregister_governor(&cpufreq_gov_dbs);
+       cpufreq_unregister_governor(&cpufreq_gov_conservative);
 }
 
 

diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index e794527e49251d10564e703805b1965844c12b65..369f44595150f7e568fff7802d8047ca645f0ffd 100644 (file)
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -47,7 +47,7 @@ static unsigned int def_sampling_rate;
                        (def_sampling_rate / MIN_SAMPLING_RATE_RATIO)
 #define MAX_SAMPLING_RATE                      (500 * def_sampling_rate)
 #define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER   (1000)
-#define TRANSITION_LATENCY_LIMIT               (10 * 1000)
+#define TRANSITION_LATENCY_LIMIT               (10 * 1000 * 1000)
 
 static void do_dbs_timer(struct work_struct *work);
 
@@ -508,12 +508,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
                if ((!cpu_online(cpu)) || (!policy->cur))
                        return -EINVAL;
 
-               if (policy->cpuinfo.transition_latency >
-                               (TRANSITION_LATENCY_LIMIT * 1000)) {
-                       printk(KERN_WARNING "ondemand governor failed to load "
-                              "due to too long transition latency\n");
-                       return -EINVAL;
-               }
                if (this_dbs_info->enable) /* Already enabled */
                        break;
 
@@ -585,11 +579,13 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
        return 0;
 }
 
-static struct cpufreq_governor cpufreq_gov_dbs = {
-       .name = "ondemand",
-       .governor = cpufreq_governor_dbs,
-       .owner = THIS_MODULE,
+struct cpufreq_governor cpufreq_gov_ondemand = {
+       .name                   = "ondemand",
+       .governor               = cpufreq_governor_dbs,
+       .max_transition_latency = TRANSITION_LATENCY_LIMIT,
+       .owner                  = THIS_MODULE,
 };
+EXPORT_SYMBOL(cpufreq_gov_ondemand);
 
 static int __init cpufreq_gov_dbs_init(void)
 {
@@ -598,12 +594,12 @@ static int __init cpufreq_gov_dbs_init(void)
                printk(KERN_ERR "Creation of kondemand failed\n");
                return -EFAULT;
        }
-       return cpufreq_register_governor(&cpufreq_gov_dbs);
+       return cpufreq_register_governor(&cpufreq_gov_ondemand);
 }
 
 static void __exit cpufreq_gov_dbs_exit(void)
 {
-       cpufreq_unregister_governor(&cpufreq_gov_dbs);
+       cpufreq_unregister_governor(&cpufreq_gov_ondemand);
        destroy_workqueue(kondemand_wq);
 }
 

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index 917b9bab9ccbc924a6e583997cf96dc03e09071f..8a45d0f93e262716690a070c017883b4910da88d 100644 (file)
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -164,8 +164,7 @@ freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
        return -1;
 }
 
-static void
-cpufreq_stats_free_table (unsigned int cpu)
+static void __cpuexit cpufreq_stats_free_table(unsigned int cpu)
 {
        struct cpufreq_stats *stat = cpufreq_stats_table[cpu];
        struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
@@ -305,8 +304,9 @@ cpufreq_stat_notifier_trans (struct notifier_block *nb, unsigned long val,
        return 0;
 }
 
-static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
-                                       unsigned long action, void *hcpu)
+static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb,
+                                              unsigned long action,
+                                              void *hcpu)
 {
        unsigned int cpu = (unsigned long)hcpu;
 
@@ -323,7 +323,7 @@ static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
        return NOTIFY_OK;
 }
 
-static struct notifier_block cpufreq_stat_cpu_notifier =
+static struct notifier_block cpufreq_stat_cpu_notifier __cpuinitdata =
 {
        .notifier_call = cpufreq_stat_cpu_callback,
 };
@@ -356,8 +356,7 @@ __init cpufreq_stats_init(void)
 
        register_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
        for_each_online_cpu(cpu) {
-               cpufreq_stat_cpu_callback(&cpufreq_stat_cpu_notifier,
-                               CPU_ONLINE, (void *)(long)cpu);
+               cpufreq_update_policy(cpu);
        }
        return 0;
 }
@@ -372,13 +371,12 @@ __exit cpufreq_stats_exit(void)
                        CPUFREQ_TRANSITION_NOTIFIER);
        unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
        for_each_online_cpu(cpu) {
-               cpufreq_stat_cpu_callback(&cpufreq_stat_cpu_notifier,
-                                               CPU_DEAD, (void *)(long)cpu);
+               cpufreq_stats_free_table(cpu);
        }
 }
 
 MODULE_AUTHOR ("Zou Nan hai <nanhai.zou@intel.com>");
-MODULE_DESCRIPTION ("'cpufreq_stats' - A driver to export cpufreq stats"
+MODULE_DESCRIPTION ("'cpufreq_stats' - A driver to export cpufreq stats "
                                "through sysfs filesystem");
 MODULE_LICENSE ("GPL");
 

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 3ec6e7ff5fbd3514cb332fac4f4ad18cab98a717..23932d7741a996721162dc264290adbed5248f6a 100644 (file)
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -32,12 +32,24 @@
  *                     CPUFREQ NOTIFIER INTERFACE                    *
  *********************************************************************/
 
-int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
-int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
-
 #define CPUFREQ_TRANSITION_NOTIFIER    (0)
 #define CPUFREQ_POLICY_NOTIFIER                (1)
 
+#ifdef CONFIG_CPU_FREQ
+int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
+int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
+#else          /* CONFIG_CPU_FREQ */
+static inline int cpufreq_register_notifier(struct notifier_block *nb,
+                                               unsigned int list)
+{
+       return 0;
+}
+static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
+                                               unsigned int list)
+{
+       return 0;
+}
+#endif         /* CONFIG_CPU_FREQ */
 
 /* if (cpufreq_driver->target) exists, the ->governor decides what frequency
  * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
@@ -155,6 +167,9 @@ struct cpufreq_governor {
        char    name[CPUFREQ_NAME_LEN];
        int     (*governor)     (struct cpufreq_policy *policy,
                                 unsigned int event);
+       unsigned int max_transition_latency; /* HW must be able to switch to
+                       next freq faster than this value in nano secs or we
+                       will fallback to performance governor */
        struct list_head        governor_list;
        struct module           *owner;
 };
@@ -279,12 +294,24 @@ static inline unsigned int cpufreq_quick_get(unsigned int cpu)
  *********************************************************************/
 
 
-#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+/*
+  Performance governor is fallback governor if any other gov failed to
+  auto load due latency restrictions
+*/
+#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
 extern struct cpufreq_governor cpufreq_gov_performance;
-#define CPUFREQ_DEFAULT_GOVERNOR       &cpufreq_gov_performance
+#endif
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+#define CPUFREQ_DEFAULT_GOVERNOR       (&cpufreq_gov_performance)
 #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
 extern struct cpufreq_governor cpufreq_gov_userspace;
-#define CPUFREQ_DEFAULT_GOVERNOR       &cpufreq_gov_userspace
+#define CPUFREQ_DEFAULT_GOVERNOR       (&cpufreq_gov_userspace)
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND)
+extern struct cpufreq_governor cpufreq_gov_ondemand;
+#define CPUFREQ_DEFAULT_GOVERNOR       (&cpufreq_gov_ondemand)
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE)
+extern struct cpufreq_governor cpufreq_gov_conservative;
+#define CPUFREQ_DEFAULT_GOVERNOR       (&cpufreq_gov_conservative)
 #endif