Merge bk://linux-dj.bkbits.net/cpufreq

into home.osdl.org:/home/torvalds/v2.5/linux

Documentation/cpu-freq/cpu-drivers.txt

@@ -64,6 +64,12 @@ And optionally
 
 cpufreq_driver.exit -		A pointer to a per-CPU cleanup function.
 
+cpufreq_driver.resume -		A pointer to a per-CPU resume function
+				which is called with interrupts disabled
+				and _before_ the pre-suspend frequency
+				and/or policy is restored by a call to
+				->target or ->setpolicy.
+
 cpufreq_driver.attr -		A pointer to a NULL-terminated list of
 				"struct freq_attr" which allow to
 				export values to sysfs.
@@ -119,7 +125,7 @@ section 2 for details on frequency table helpers.
 
 You need to make sure that at least one valid frequency (or operating
 range) is within policy->min and policy->max. If necessary, increase
-policy->max fist, and only if this is no solution, decreas policy->min.
+policy->max first, and only if this is no solution, decrease policy->min.
 
 
 1.4 target or setpolicy?

arch/arm/Kconfig

@@ -542,39 +542,15 @@ config CPU_FREQ_SA1100
 	bool
 	depends on CPU_FREQ && SA1100_LART
 	default y
+	select CPU_FREQ_DEFAULT_GOV_USERSPACE
+	select CPU_FREQ_24_API if SYSCTL
 
 config CPU_FREQ_SA1110
 	bool
 	depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 	default y
-
-if (CPU_FREQ_SA1100 || CPU_FREQ_SA1110)
-
-config CPU_FREQ_GOV_USERSPACE
-	tristate
-	depends on CPU_FREQ
-	default y
-
-config CPU_FREQ_24_API
-	bool
-	depends on CPU_FREQ_GOV_USERSPACE && SYSCTL
-	default y
-
-config CPU_FREQ_PROC_INTF
-	tristate "/proc/cpufreq interface (deprecated)"
-	depends on CPU_FREQ && PROC_FS
-	help
-	  This enables the /proc/cpufreq interface for controlling
-	  CPUFreq. Please note that it is recommended to use the sysfs
-	  interface instead (which is built automatically).
-
-	  For details, take a look at linux/Documentation/cpufreq.
-
-	  If in doubt, say N.
-
-endif
-
-# CPUfreq on Integrator can use the generic cpufreq core
+	select CPU_FREQ_DEFAULT_GOV_USERSPACE
+	select CPU_FREQ_24_API if SYSCTL
 
 config CPU_FREQ_INTEGRATOR
 	tristate "CPUfreq driver for ARM Integrator CPUs"
@@ -587,7 +563,7 @@ config CPU_FREQ_INTEGRATOR
 
 	  If in doubt, say Y.
 
-if (CPU_FREQ_INTEGRATOR)
+if (CPU_FREQ_INTEGRATOR) || (CPU_FREQ_SA1110) || (CPU_FREQ_SA1100)
 
 source "drivers/cpufreq/Kconfig"
 

arch/arm/mach-integrator/cpu.c

@@ -170,7 +170,7 @@ static int integrator_cpufreq_init(struct cpufreq_policy *policy)
 	vco.r = 22;
 
 	/* set default policy and cpuinfo */
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.max_freq = 160000;
 	policy->cpuinfo.min_freq = 12000;
 	policy->cpuinfo.transition_latency = 1000; /* 1 ms, assumed */

arch/arm/mach-sa1100/cpu-sa1100.c

@@ -222,7 +222,7 @@ static int __init sa1100_cpu_init(struct cpufreq_policy *policy)
 	if (policy->cpu != 0)
 		return -EINVAL;
 	policy->cur = policy->min = policy->max = sa11x0_getspeed();
-	policy->policy = CPUFREQ_POLICY_POWERSAVE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.min_freq = 59000;
 	policy->cpuinfo.max_freq = 287000;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

arch/arm/mach-sa1100/cpu-sa1110.c

@@ -321,7 +321,7 @@ static int __init sa1110_cpu_init(struct cpufreq_policy *policy)
 	if (policy->cpu != 0)
 		return -EINVAL;
 	policy->cur = policy->min = policy->max = sa11x0_getspeed();
-	policy->policy = CPUFREQ_POLICY_POWERSAVE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.min_freq = 59000;
 	policy->cpuinfo.max_freq = 287000;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

arch/i386/kernel/cpu/cpufreq/acpi.c

@@ -580,7 +580,7 @@ acpi_cpufreq_cpu_init (
 		if (perf->states[i].transition_latency > policy->cpuinfo.transition_latency)
 			policy->cpuinfo.transition_latency = perf->states[i].transition_latency;
 	}
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cur = perf->states[pr->limit.state.px].core_frequency * 1000;
 
 	/* table init */

arch/i386/kernel/cpu/cpufreq/elanfreq.c

@@ -216,7 +216,7 @@ static int elanfreq_cpu_init(struct cpufreq_policy *policy)
 	}
 
 	/* cpuinfo and default policy values */
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
 	policy->cur = elanfreq_get_cpu_frequency();
 

arch/i386/kernel/cpu/cpufreq/gx-suspmod.c

@@ -434,7 +434,7 @@ static int cpufreq_gx_cpu_init(struct cpufreq_policy *policy)
 		policy->min = maxfreq / POLICY_MIN_DIV;
 	policy->max = maxfreq;
 	policy->cur = curfreq;
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.min_freq = maxfreq / max_duration;
 	policy->cpuinfo.max_freq = maxfreq;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

arch/i386/kernel/cpu/cpufreq/longhaul.h

@@ -47,3 +47,204 @@ union msr_longhaul {
 	unsigned long long val;
 };
 
+/*
+ * Clock ratio tables. Div/Mod by 10 to get ratio.
+ * The eblcr ones specify the ratio read from the CPU.
+ * The clock_ratio ones specify what to write to the CPU.
+ */
+
+/*
+ * VIA C3 Samuel 1  & Samuel 2 (stepping 0)
+ */
+static int __initdata longhaul1_clock_ratio[16] = {
+	-1, /* 0000 -> RESERVED */
+	30, /* 0001 ->  3.0x */
+	40, /* 0010 ->  4.0x */
+	-1, /* 0011 -> RESERVED */
+	-1, /* 0100 -> RESERVED */
+	35, /* 0101 ->  3.5x */
+	45, /* 0110 ->  4.5x */
+	55, /* 0111 ->  5.5x */
+	60, /* 1000 ->  6.0x */
+	70, /* 1001 ->  7.0x */
+	80, /* 1010 ->  8.0x */
+	50, /* 1011 ->  5.0x */
+	65, /* 1100 ->  6.5x */
+	75, /* 1101 ->  7.5x */
+	-1, /* 1110 -> RESERVED */
+	-1, /* 1111 -> RESERVED */
+};
+
+static int __initdata samuel1_eblcr[16] = {
+	50, /* 0000 -> RESERVED */
+	30, /* 0001 ->  3.0x */
+	40, /* 0010 ->  4.0x */
+	-1, /* 0011 -> RESERVED */
+	55, /* 0100 ->  5.5x */
+	35, /* 0101 ->  3.5x */
+	45, /* 0110 ->  4.5x */
+	-1, /* 0111 -> RESERVED */
+	-1, /* 1000 -> RESERVED */
+	70, /* 1001 ->  7.0x */
+	80, /* 1010 ->  8.0x */
+	60, /* 1011 ->  6.0x */
+	-1, /* 1100 -> RESERVED */
+	75, /* 1101 ->  7.5x */
+	-1, /* 1110 -> RESERVED */
+	65, /* 1111 ->  6.5x */
+};
+
+/*
+ * VIA C3 Samuel2 Stepping 1->15 & VIA C3 Ezra
+ */
+static int __initdata longhaul2_clock_ratio[16] = {
+	100, /* 0000 -> 10.0x */
+	30,  /* 0001 ->  3.0x */
+	40,  /* 0010 ->  4.0x */
+	90,  /* 0011 ->  9.0x */
+	95,  /* 0100 ->  9.5x */
+	35,  /* 0101 ->  3.5x */
+	45,  /* 0110 ->  4.5x */
+	55,  /* 0111 ->  5.5x */
+	60,  /* 1000 ->  6.0x */
+	70,  /* 1001 ->  7.0x */
+	80,  /* 1010 ->  8.0x */
+	50,  /* 1011 ->  5.0x */
+	65,  /* 1100 ->  6.5x */
+	75,  /* 1101 ->  7.5x */
+	85,  /* 1110 ->  8.5x */
+	120, /* 1111 -> 12.0x */
+};
+
+static int __initdata samuel2_eblcr[16] = {
+	50,  /* 0000 ->  5.0x */
+	30,  /* 0001 ->  3.0x */
+	40,  /* 0010 ->  4.0x */
+	100, /* 0011 -> 10.0x */
+	55,  /* 0100 ->  5.5x */
+	35,  /* 0101 ->  3.5x */
+	45,  /* 0110 ->  4.5x */
+	110, /* 0111 -> 11.0x */
+	90,  /* 1000 ->  9.0x */
+	70,  /* 1001 ->  7.0x */
+	80,  /* 1010 ->  8.0x */
+	60,  /* 1011 ->  6.0x */
+	120, /* 1100 -> 12.0x */
+	75,  /* 1101 ->  7.5x */
+	130, /* 1110 -> 13.0x */
+	65,  /* 1111 ->  6.5x */
+};
+
+static int __initdata ezra_eblcr[16] = {
+	50,  /* 0000 ->  5.0x */
+	30,  /* 0001 ->  3.0x */
+	40,  /* 0010 ->  4.0x */
+	100, /* 0011 -> 10.0x */
+	55,  /* 0100 ->  5.5x */
+	35,  /* 0101 ->  3.5x */
+	45,  /* 0110 ->  4.5x */
+	95,  /* 0111 ->  9.5x */
+	90,  /* 1000 ->  9.0x */
+	70,  /* 1001 ->  7.0x */
+	80,  /* 1010 ->  8.0x */
+	60,  /* 1011 ->  6.0x */
+	120, /* 1100 -> 12.0x */
+	75,  /* 1101 ->  7.5x */
+	85,  /* 1110 ->  8.5x */
+	65,  /* 1111 ->  6.5x */
+};
+
+/*
+ * VIA C3 (Ezra-T) [C5M].
+ */
+static int __initdata longhaul3_clock_ratio[32] = {
+	100, /* 0000 -> 10.0x */
+	30,  /* 0001 ->  3.0x */
+	40,  /* 0010 ->  4.0x */
+	90,  /* 0011 ->  9.0x */
+	95,  /* 0100 ->  9.5x */
+	35,  /* 0101 ->  3.5x */
+	45,  /* 0110 ->  4.5x */
+	55,  /* 0111 ->  5.5x */
+	60,  /* 1000 ->  6.0x */
+	70,  /* 1001 ->  7.0x */
+	80,  /* 1010 ->  8.0x */
+	50,  /* 1011 ->  5.0x */
+	65,  /* 1100 ->  6.5x */
+	75,  /* 1101 ->  7.5x */
+	85,  /* 1110 ->  8.5x */
+	120, /* 1111 ->  12.0x */
+
+	-1,  /* 0000 -> RESERVED (10.0x) */
+	110, /* 0001 -> 11.0x */
+	120, /* 0010 -> 12.0x */
+	-1,  /* 0011 -> RESERVED (9.0x)*/
+	105, /* 0100 -> 10.5x */
+	115, /* 0101 -> 11.5x */
+	125, /* 0110 -> 12.5x */
+	135, /* 0111 -> 13.5x */
+	140, /* 1000 -> 14.0x */
+	150, /* 1001 -> 15.0x */
+	160, /* 1010 -> 16.0x */
+	130, /* 1011 -> 13.0x */
+	145, /* 1100 -> 14.5x */
+	155, /* 1101 -> 15.5x */
+	-1,  /* 1110 -> RESERVED (13.0x) */
+	-1,  /* 1111 -> RESERVED (12.0x) */
+};
+
+static int __initdata c5m_eblcr[32] = {
+	50,  /* 0000 ->  5.0x */
+	30,  /* 0001 ->  3.0x */
+	40,  /* 0010 ->  4.0x */
+	100, /* 0011 -> 10.0x */
+	55,  /* 0100 ->  5.5x */
+	35,  /* 0101 ->  3.5x */
+	45,  /* 0110 ->  4.5x */
+	95,  /* 0111 ->  9.5x */
+	90,  /* 1000 ->  9.0x */
+	70,  /* 1001 ->  7.0x */
+	80,  /* 1010 ->  8.0x */
+	60,  /* 1011 ->  6.0x */
+	120, /* 1100 -> 12.0x */
+	75,  /* 1101 ->  7.5x */
+	85,  /* 1110 ->  8.5x */
+	65,  /* 1111 ->  6.5x */
+
+	-1,  /* 0000 -> RESERVED (9.0x) */
+	110, /* 0001 -> 11.0x */
+	120, /* 0010 -> 12.0x */
+	-1,  /* 0011 -> RESERVED (10.0x)*/
+	135, /* 0100 -> 13.5x */
+	115, /* 0101 -> 11.5x */
+	125, /* 0110 -> 12.5x */
+	105, /* 0111 -> 10.5x */
+	130, /* 1000 -> 13.0x */
+	150, /* 1001 -> 15.0x */
+	160, /* 1010 -> 16.0x */
+	140, /* 1011 -> 14.0x */
+	-1,  /* 1100 -> RESERVED (12.0x) */
+	155, /* 1101 -> 15.5x */
+	-1,  /* 1110 -> RESERVED (13.0x) */
+	145, /* 1111 -> 14.5x */
+};
+
+
+/* 
+ * Voltage scales. Div/Mod by 1000 to get actual voltage.
+ * Which scale to use depends on the VRM type in use.
+ */
+static int __initdata vrm85scales[32] = {
+	1250, 1200, 1150, 1100, 1050, 1800, 1750, 1700,
+	1650, 1600, 1550, 1500, 1450, 1400, 1350, 1300,
+	1275, 1225, 1175, 1125, 1075, 1825, 1775, 1725,
+	1675, 1625, 1575, 1525, 1475, 1425, 1375, 1325,
+};
+
+static int __initdata mobilevrmscales[32] = {
+	2000, 1950, 1900, 1850, 1800, 1750, 1700, 1650,
+	1600, 1550, 1500, 1450, 1500, 1350, 1300, -1,
+	1275, 1250, 1225, 1200, 1175, 1150, 1125, 1100,
+	1075, 1050, 1025, 1000, 975, 950, 925, -1,
+};
+

arch/i386/kernel/cpu/cpufreq/longrun.c

@@ -120,7 +120,8 @@ static int longrun_verify_policy(struct cpufreq_policy *policy)
 		policy->cpuinfo.min_freq, 
 		policy->cpuinfo.max_freq);
 
-	if (policy->policy == CPUFREQ_POLICY_GOVERNOR)
+	if ((policy->policy != CPUFREQ_POLICY_POWERSAVE) &&
+	    (policy->policy != CPUFREQ_POLICY_PERFORMANCE))
 		return -EINVAL;
 
 	return 0;

arch/i386/kernel/cpu/cpufreq/p4-clockmod.c

@@ -211,7 +211,7 @@ 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->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = 1000;
 	policy->cur = stock_freq;
 

arch/i386/kernel/cpu/cpufreq/powernow-k6.c

@@ -157,7 +157,7 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
 	}
 
 	/* cpuinfo and default policy values */
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
 	policy->cur = busfreq * max_multiplier;
 

arch/i386/kernel/cpu/cpufreq/powernow-k7.c

 /*
  *  AMD K7 Powernow driver.
  *  (C) 2003 Dave Jones <davej@codemonkey.org.uk> on behalf of SuSE Labs.
+ *  (C) 2003 Dave Jones <davej@redhat.com>
  *
  *  Licensed under the terms of the GNU GPL License version 2.
  *  Based upon datasheets & sample CPUs kindly provided by AMD.
@@ -325,6 +326,8 @@ static int powernow_decode_bios (int maxfid, int startvid)
 						p+=2;
 				}
 			}
+			printk (KERN_INFO PFX "No PST tables match this cpuid (0x%x)\n", etuple);
+			printk ("This is indicative of a broken BIOS. Email davej@redhat.com\n");
 			return -EINVAL;
 		}
 		p++;
@@ -372,7 +375,7 @@ 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, maximum_speed);
 
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = latency;
 	policy->cur = maximum_speed;
 

arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c

@@ -201,9 +201,7 @@ static int centrino_cpu_init(struct cpufreq_policy *policy)
 
 	freq = get_cur_freq();
 
-	policy->policy = (freq == centrino_model->max_freq) ? 
-		CPUFREQ_POLICY_PERFORMANCE : 
-		CPUFREQ_POLICY_POWERSAVE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = 10; /* 10uS transition latency */
 	policy->cur = freq;
 

arch/i386/kernel/cpu/cpufreq/speedstep-ich.c

@@ -299,8 +299,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
 		(speed / 1000));
 
 	/* cpuinfo and default policy values */
-	policy->policy = (speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? 
-		CPUFREQ_POLICY_POWERSAVE : CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
 	policy->cur = speed;
 
@@ -309,7 +308,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
 
 
 static struct cpufreq_driver speedstep_driver = {
-	.name		= "speedstep",
+	.name		= "speedstep-ich",
 	.verify 	= speedstep_verify,
 	.target 	= speedstep_target,
 	.init		= speedstep_cpu_init,

arch/ppc/platforms/pmac_cpufreq.c

@@ -257,8 +257,7 @@ pmac_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	if (policy->cpu != 0)
 		return -ENODEV;
 
-	policy->policy = (cur_freq == low_freq) ? 
-		CPUFREQ_POLICY_POWERSAVE : CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency	= CPUFREQ_ETERNAL;
 	policy->cur = cur_freq;
 

arch/sh/kernel/cpufreq.c

@@ -160,7 +160,7 @@ static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	sh_freqs[SH_FREQ_MIN].frequency = min_freq;
 
 	/* cpuinfo and default policy values */
-	policy->policy                     = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor                   = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
 	policy->cur                        = max_freq;
 

arch/sparc64/kernel/us2e_cpufreq.c

@@ -309,7 +309,7 @@ static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
 	table[2].index = 5;
 	table[3].frequency = CPUFREQ_TABLE_END;
 
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = 0;
 	policy->cur = clock_tick;
 

arch/sparc64/kernel/us3_cpufreq.c

@@ -163,7 +163,7 @@ static int __init us3_freq_cpu_init(struct cpufreq_policy *policy)
 	table[3].index = 0;
 	table[3].frequency = CPUFREQ_TABLE_END;
 
-	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	policy->cpuinfo.transition_latency = 0;
 	policy->cur = clock_tick;
 

drivers/cpufreq/Kconfig

@@ -10,6 +10,51 @@ config CPU_FREQ_PROC_INTF
 	  
 	  If in doubt, say N.
 
+choice
+	prompt "Default CPUFreq governor"
+	depends on CPU_FREQ
+	default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+	help
+	  This option sets which CPUFreq governor shall be loaded at
+	  startup. If in doubt, select 'performance'.
+
+config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+	bool "performance"
+	select CPU_FREQ_GOV_PERFORMANCE
+	help
+	  Use the CPUFreq governor 'performance' as default. This sets
+	  the frequency statically to the highest frequency supported by
+	  the CPU.
+
+config CPU_FREQ_DEFAULT_GOV_USERSPACE
+	bool "userspace"
+	select CPU_FREQ_GOV_USERSPACE
+	help
+	  Use the CPUFreq governor 'userspace' as default. This allows
+	  you to set the CPU frequency manually or when an userspace 
+	  programm shall be able to set the CPU dynamically without having
+	  to enable the userspace governor manually.
+
+endchoice
+
+config CPU_FREQ_GOV_PERFORMANCE
+       tristate "'performance' governor"
+       depends on CPU_FREQ
+       help
+	  This cpufreq governors set the frequency statically to the
+	  highest available CPU frequency.
+
+	  If in doubt, say Y.
+
+config CPU_FREQ_GOV_POWERSAVE
+       tristate "'powersave' governor"
+       depends on CPU_FREQ
+       help
+	  Theis cpufreq governors set the frequency statically to the
+	  lowest available CPU frequency.
+
+	  If in doubt, say Y.
+
 config CPU_FREQ_GOV_USERSPACE
        tristate "'userspace' governor for userspace frequency scaling"
        depends on CPU_FREQ 

drivers/cpufreq/Makefile

+# CPUfreq core
+obj-$(CONFIG_CPU_FREQ)			+= cpufreq.o
+
 # CPUfreq governors 
-obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE)	+= userspace.o
+obj-$(CONFIG_CPU_FREQ_GOV_PERFORMANCE)	+= cpufreq_performance.o
+obj-$(CONFIG_CPU_FREQ_GOV_POWERSAVE)	+= cpufreq_powersave.o
+obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE)	+= cpufreq_userspace.o
 
 # CPUfreq cross-arch helpers
 obj-$(CONFIG_CPU_FREQ_TABLE)		+= freq_table.o

kernel/cpufreq.c → drivers/cpufreq/cpufreq.c

@@ -109,12 +109,17 @@ static void cpufreq_cpu_put(struct cpufreq_policy *data)
 int cpufreq_parse_governor (char *str_governor, unsigned int *policy,
 				struct cpufreq_governor **governor)
 {
+	if (!cpufreq_driver)
+		return -EINVAL;
+	if (cpufreq_driver->setpolicy) {
 		if (!strnicmp(str_governor, "performance", CPUFREQ_NAME_LEN)) {
 			*policy = CPUFREQ_POLICY_PERFORMANCE;
 			return 0;
 		} else if (!strnicmp(str_governor, "powersave", CPUFREQ_NAME_LEN)) {
 			*policy = CPUFREQ_POLICY_POWERSAVE;
 			return 0;
+		}
+		return -EINVAL;
 	} else {
 		struct cpufreq_governor *t;
 		down(&cpufreq_governor_sem);
@@ -123,7 +128,6 @@ int cpufreq_parse_governor (char *str_governor, unsigned int *policy,
 		list_for_each_entry(t, &cpufreq_governor_list, governor_list) {
 			if (!strnicmp(str_governor,t->name,CPUFREQ_NAME_LEN)) {
 				*governor = t;
-				*policy = CPUFREQ_POLICY_GOVERNOR;
 				up(&cpufreq_governor_sem);
 				return 0;
 			}
@@ -190,16 +194,13 @@ store_one(scaling_max_freq,max);
  */
 static ssize_t show_scaling_governor (struct cpufreq_policy * policy, char *buf)
 {
-	switch (policy->policy) {
-	case CPUFREQ_POLICY_POWERSAVE:
+	if(policy->policy == CPUFREQ_POLICY_POWERSAVE)
 		return sprintf(buf, "powersave\n");
-	case CPUFREQ_POLICY_PERFORMANCE:
+	else if (policy->policy == CPUFREQ_POLICY_PERFORMANCE)
 		return sprintf(buf, "performance\n");
-	case CPUFREQ_POLICY_GOVERNOR:
+	else if (policy->governor)
 		return snprintf(buf, CPUFREQ_NAME_LEN, "%s\n", policy->governor->name);
-	default:
 	return -EINVAL;
-	}
 }
 
 
@@ -246,15 +247,15 @@ static ssize_t show_scaling_available_governors (struct cpufreq_policy * policy,
 	ssize_t i = 0;
 	struct cpufreq_governor *t;
 
+	if (!cpufreq_driver->target) {
 		i += sprintf(buf, "performance powersave");
-
-	if (!cpufreq_driver->target)
 		goto out;
+	}
 
 	list_for_each_entry(t, &cpufreq_governor_list, governor_list) {
 		if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char)) - (CPUFREQ_NAME_LEN + 2)))
 			goto out;
-		i += snprintf(&buf[i], CPUFREQ_NAME_LEN, " %s", t->name);
+		i += snprintf(&buf[i], CPUFREQ_NAME_LEN, "%s ", t->name);
 	}
  out:
 	i += sprintf(&buf[i], "\n");
@@ -396,10 +397,12 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
 	spin_lock_irqsave(&cpufreq_driver_lock, flags);
 	cpufreq_cpu_data[cpu] = policy;
 	spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
+	policy->governor = NULL; /* to assure that the starting sequence is
+				  * run in cpufreq_set_policy */
 	up(&policy->lock);
 	
 	/* set default policy */
+	
 	ret = cpufreq_set_policy(&new_policy);
 	if (ret)
 		goto err_out_unregister;
@@ -492,6 +495,13 @@ static int cpufreq_resume(struct sys_device * sysdev)
 	if (!cpu_policy)
 		return -EINVAL;
 
+	if (cpufreq_driver->resume)
+		ret = cpufreq_driver->resume(cpu_policy);
+	if (ret) {
+		printk(KERN_ERR "cpufreq: resume failed in ->resume step on CPU %u\n", cpu_policy->cpu);
+		goto out;
+	}
+
 	if (cpufreq_driver->setpolicy)
 		ret = cpufreq_driver->setpolicy(cpu_policy);
 	else
@@ -500,6 +510,12 @@ static int cpufreq_resume(struct sys_device * sysdev)
 	 */
 		ret = cpufreq_driver->target(cpu_policy, cpu_policy->cur, CPUFREQ_RELATION_H);
 
+	if (ret) {
+		printk(KERN_ERR "cpufreq: resume failed in ->setpolicy/target step on CPU %u\n", cpu_policy->cpu);
+		goto out;
+	}
+
+ out:
 	cpufreq_cpu_put(cpu_policy);
 
 	return ret;
@@ -622,33 +638,18 @@ EXPORT_SYMBOL_GPL(cpufreq_driver_target);
 
 static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
 {
-	int ret = 0;
+	int ret = -EINVAL;
 
-	switch (policy->policy) {
-	case CPUFREQ_POLICY_POWERSAVE: 
-		if ((event == CPUFREQ_GOV_LIMITS) || (event == CPUFREQ_GOV_START)) {
-			ret = __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
-		}
-		break;
-	case CPUFREQ_POLICY_PERFORMANCE:
-		if ((event == CPUFREQ_GOV_LIMITS) || (event == CPUFREQ_GOV_START)) {
-			ret = __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
-		}
-		break;
-	case CPUFREQ_POLICY_GOVERNOR:
-		ret = -EINVAL;
 	if (!try_module_get(policy->governor->owner))
-			break;
+		return -EINVAL;
+
 	ret = policy->governor->governor(policy, event);
+
 	/* we keep one module reference alive for each CPU governed by this CPU */
 	if ((event != CPUFREQ_GOV_START) || ret)
 		module_put(policy->governor->owner);
 	if ((event == CPUFREQ_GOV_STOP) && !ret)
 		module_put(policy->governor->owner);
-		break;
-	default:
-		ret = -EINVAL;
-	}
 
 	return ret;
 }
@@ -680,11 +681,6 @@ int cpufreq_register_governor(struct cpufreq_governor *governor)
 	if (!governor)
 		return -EINVAL;
 
-	if (!strnicmp(governor->name,"powersave",CPUFREQ_NAME_LEN))
-		return -EBUSY;
-	if (!strnicmp(governor->name,"performance",CPUFREQ_NAME_LEN))
-		return -EBUSY;
-
 	down(&cpufreq_governor_sem);
 	
 	list_for_each_entry(t, &cpufreq_governor_list, governor_list) {
@@ -808,24 +804,25 @@ int cpufreq_set_policy(struct cpufreq_policy *policy)
 		data->policy = policy->policy;
 		ret = cpufreq_driver->setpolicy(policy);
 	} else {
-		if ((policy->policy != data->policy) || 
-		    ((policy->policy == CPUFREQ_POLICY_GOVERNOR) && (policy->governor != data->governor))) {
+		if (policy->governor != data->governor) {
 			/* save old, working values */
-			unsigned int old_pol = data->policy;
 			struct cpufreq_governor *old_gov = data->governor;
 
 			/* end old governor */
+			if (data->governor)
 				__cpufreq_governor(data, CPUFREQ_GOV_STOP);
 
 			/* start new governor */
-			data->policy = policy->policy;
 			data->governor = policy->governor;
 			if (__cpufreq_governor(data, CPUFREQ_GOV_START)) {
 				/* new governor failed, so re-start old one */
-				data->policy = old_pol;
+				if (old_gov) {
 					data->governor = old_gov;
 					__cpufreq_governor(data, CPUFREQ_GOV_START);
 				}
+				ret = -EINVAL;
+				goto error_out;
+			}
 			/* might be a policy change, too, so fall through */
 		}
 		__cpufreq_governor(data, CPUFREQ_GOV_LIMITS);

drivers/cpufreq/cpufreq_performance.c

+/*
+ *  linux/drivers/cpufreq/cpufreq_performance.c
+ *
+ *  Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+
+static int cpufreq_governor_performance(struct cpufreq_policy *policy,
+					unsigned int event)
+{
+	switch (event) {
+	case CPUFREQ_GOV_START:
+	case CPUFREQ_GOV_LIMITS:
+		__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+                                                            
+struct cpufreq_governor cpufreq_gov_performance = {
+	.name		= "performance",
+	.governor	= cpufreq_governor_performance,
+	.owner		= THIS_MODULE,
+};
+EXPORT_SYMBOL(cpufreq_gov_performance);
+
+
+static int __init cpufreq_gov_performance_init(void)
+{
+	return cpufreq_register_governor(&cpufreq_gov_performance);
+}
+
+
+static void __exit cpufreq_gov_performance_exit(void)
+{
+	cpufreq_unregister_governor(&cpufreq_gov_performance);
+}
+
+
+MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
+MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
+MODULE_LICENSE("GPL");
+
+fs_initcall(cpufreq_gov_performance_init);
+module_exit(cpufreq_gov_performance_exit);

drivers/cpufreq/cpufreq_powersave.c

+/*
+ *  linux/drivers/cpufreq/cpufreq_powersave.c
+ *
+ *  Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+
+static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
+					unsigned int event)
+{
+	switch (event) {
+	case CPUFREQ_GOV_START:
+	case CPUFREQ_GOV_LIMITS:
+		__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+                                                            
+static struct cpufreq_governor cpufreq_gov_powersave = {
+	.name		= "powersave",
+	.governor	= cpufreq_governor_powersave,
+	.owner		= THIS_MODULE,
+};
+
+
+static int __init cpufreq_gov_powersave_init(void)
+{
+	return cpufreq_register_governor(&cpufreq_gov_powersave);
+}
+
+
+static void __exit cpufreq_gov_powersave_exit(void)
+{
+	cpufreq_unregister_governor(&cpufreq_gov_powersave);
+}
+
+
+MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
+MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
+MODULE_LICENSE("GPL");
+
+module_init(cpufreq_gov_powersave_init);
+module_exit(cpufreq_gov_powersave_exit);

drivers/cpufreq/userspace.c → drivers/cpufreq/cpufreq_userspace.c

@@ -498,9 +498,9 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
 	unsigned int cpu = policy->cpu;
 	switch (event) {
 	case CPUFREQ_GOV_START:
-		if ((!cpu_online(cpu)) || (!try_module_get(THIS_MODULE)) ||
-		    !policy->cur)
+		if ((!cpu_online(cpu)) || (!try_module_get(THIS_MODULE)))
 			return -EINVAL;
+		BUG_ON(!policy->cur);
 		down(&userspace_sem);
 		cpu_is_managed[cpu] = 1;		
 		cpu_min_freq[cpu] = policy->min;
@@ -551,7 +551,7 @@ static void cpufreq_sa11x0_compat(void)
 #endif
 
 
-static struct cpufreq_governor cpufreq_gov_userspace = {
+struct cpufreq_governor cpufreq_gov_userspace = {
 	.name		= "userspace",
 	.governor	= cpufreq_governor_userspace,
 	.owner		= THIS_MODULE,
@@ -587,5 +587,5 @@ MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>, Russell King <rmk@arm.linux.
 MODULE_DESCRIPTION ("CPUfreq policy governor 'userspace'");
 MODULE_LICENSE ("GPL");
 
-module_init(cpufreq_gov_userspace_init);
+fs_initcall(cpufreq_gov_userspace_init);
 module_exit(cpufreq_gov_userspace_exit);

drivers/cpufreq/proc_intf.c

@@ -126,6 +126,7 @@ static int cpufreq_proc_read (
 
 		p += sprintf(p, "CPU%3d    %9d kHz (%3d %%)  -  %9d kHz (%3d %%)  -  ",
 			     i , policy.min, min_pctg, policy.max, max_pctg);
+		if (policy.policy) {
 			switch (policy.policy) {
 				case CPUFREQ_POLICY_POWERSAVE:
 				p += sprintf(p, "powersave\n");
@@ -133,13 +134,12 @@ static int cpufreq_proc_read (
 			case CPUFREQ_POLICY_PERFORMANCE:
 				p += sprintf(p, "performance\n");
 				break;
-		case CPUFREQ_POLICY_GOVERNOR:
-			p += snprintf(p, CPUFREQ_NAME_LEN, "%s\n", policy.governor->name);
-			break;
 			default:
 				p += sprintf(p, "INVALID\n");
 				break;
 			} 
+		} else
+			p += snprintf(p, CPUFREQ_NAME_LEN, "%s\n", policy.governor->name);
 	}
 end:
 	len = (p - page);

include/linux/cpufreq.h

@@ -36,11 +36,13 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
 #define CPUFREQ_POLICY_NOTIFIER		(1)
 
 
-/********************** cpufreq policy notifiers *********************/
+/* if (cpufreq_driver->target) exists, the ->governor decides what frequency
+ * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
+ * two generic policies are available:
+ */
 
 #define CPUFREQ_POLICY_POWERSAVE	(1)
 #define CPUFREQ_POLICY_PERFORMANCE	(2)
-#define CPUFREQ_POLICY_GOVERNOR		(3)
 
 /* Frequency values here are CPU kHz so that hardware which doesn't run 
  * with some frequencies can complain without having to guess what per 
@@ -151,6 +153,7 @@ int cpufreq_governor(unsigned int cpu, unsigned int event);
 int cpufreq_register_governor(struct cpufreq_governor *governor);
 void cpufreq_unregister_governor(struct cpufreq_governor *governor);
 
+
 /*********************************************************************
  *                      CPUFREQ DRIVER INTERFACE                     *
  *********************************************************************/
@@ -176,6 +179,7 @@ struct cpufreq_driver {
 
 	/* optional */
 	int	(*exit)		(struct cpufreq_policy *policy);
+	int	(*resume)	(struct cpufreq_policy *policy);
 	struct freq_attr	**attr;
 };
 
@@ -221,7 +225,6 @@ int cpufreq_parse_governor (char *str_governor, unsigned int *policy, struct cpu
 /*********************************************************************
  *                      CPUFREQ USERSPACE GOVERNOR                   *
  *********************************************************************/
-extern struct cpufreq_governor cpufreq_gov_userspace;
 int cpufreq_gov_userspace_init(void);
 
 int cpufreq_setmax(unsigned int cpu);
@@ -279,6 +282,19 @@ enum {
 #endif /* CONFIG_CPU_FREQ_GOV_USERSPACE */
 
 
+/*********************************************************************
+ *                       CPUFREQ DEFAULT GOVERNOR                    *
+ *********************************************************************/
+
+
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+extern struct cpufreq_governor cpufreq_gov_performance;
+#define CPUFREQ_DEFAULT_GOVERNOR	&cpufreq_gov_performance
+#elif CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE
+extern struct cpufreq_governor cpufreq_gov_userspace;
+#define CPUFREQ_DEFAULT_GOVERNOR	&cpufreq_gov_userspace
+#endif
+
 /*********************************************************************
  *                     FREQUENCY TABLE HELPERS                       *
  *********************************************************************/

kernel/Makefile

@@ -15,7 +15,6 @@ obj-$(CONFIG_UID16) += uid16.o
 obj-$(CONFIG_MODULES) += ksyms.o module.o
 obj-$(CONFIG_KALLSYMS) += kallsyms.o
 obj-$(CONFIG_PM) += power/
-obj-$(CONFIG_CPU_FREQ) += cpufreq.o
 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
 obj-$(CONFIG_COMPAT) += compat.o
 obj-$(CONFIG_IKCONFIG) += configs.o