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

into home.transmeta.com:/home/torvalds/v2.5/linux

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

@@ -555,6 +555,7 @@ acpi_cpufreq_cpu_init (
 	unsigned int		cpu = policy->cpu;
 	struct acpi_processor	*pr = NULL;
 	struct acpi_processor_performance *perf = &performance[policy->cpu];
+	struct acpi_device	*device;
 	unsigned int		result = 0;
 
 	ACPI_FUNCTION_TRACE("acpi_cpufreq_cpu_init");
@@ -596,6 +597,17 @@ acpi_cpufreq_cpu_init (
 
 	acpi_cpufreq_add_file(pr);
 
+	if (acpi_bus_get_device(pr->handle, &device))
+		device = NULL;
+		
+	printk(KERN_INFO "cpufreq: %s - ACPI performance management activated.\n",
+		device ? acpi_device_bid(device) : "CPU??");
+	for (i = 0; i < pr->performance->state_count; i++)
+		printk(KERN_INFO "cpufreq: %cP%d: %d MHz, %d mW, %d uS\n",
+			(i == pr->performance->state?'*':' '), i,
+			(u32) pr->performance->states[i].core_frequency,
+			(u32) pr->performance->states[i].power,
+			(u32) pr->performance->states[i].transition_latency);
 	return_VALUE(result);
 }
 
@@ -658,16 +670,21 @@ acpi_cpufreq_init (void)
 
 	/* test it on one CPU */
 	for (i=0; i<NR_CPUS; i++) {
-		if (cpu_online(i))
+		if (!cpu_online(i))
 			continue;
 		pr = performance[i].pr;
 		if (pr && pr->flags.performance)
 			goto found_capable_cpu;
 	}
 	result = -ENODEV;
-	goto err;
+	goto err0;
 
  found_capable_cpu:
+	
+ 	result = cpufreq_register_driver(&acpi_cpufreq_driver);
+	if (result) 
+		goto err0;
+	
 	perf = pr->performance;
 	current_state = perf->state;
 
@@ -676,7 +693,7 @@ acpi_cpufreq_init (void)
 		if (result) {
 			ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Disabled P-States due to failure while switching.\n"));
 			result = -ENODEV;
-			goto err;
+			goto err1;
 		}
 	}
 
@@ -684,7 +701,7 @@ acpi_cpufreq_init (void)
 	if (result) {
 		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Disabled P-States due to failure while switching.\n"));
 		result = -ENODEV;
-		goto err;
+		goto err1;
 	}
 	
 	if (current_state != 0) {
@@ -692,18 +709,17 @@ acpi_cpufreq_init (void)
 		if (result) {
 			ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Disabled P-States due to failure while switching.\n"));
 			result = -ENODEV;
-			goto err;
+			goto err1;
 		}
 	}
 
-	result = cpufreq_register_driver(&acpi_cpufreq_driver);
-	if (result)
-		goto err;
-
 	return_VALUE(0);
 
 	/* error handling */
- err:
+ err1:
+	cpufreq_unregister_driver(&acpi_cpufreq_driver);
+	
+ err0:
 	/* unregister struct acpi_processor_performance performance */
 	for (i=0; i<NR_CPUS; i++) {
 		if (performance[i].pr) {
@@ -713,6 +729,8 @@ acpi_cpufreq_init (void)
 		}
 	}
 	kfree(performance);
+	
+	printk(KERN_INFO "cpufreq: No CPUs supporting ACPI performance management found.\n");
 	return_VALUE(result);
 }
 

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

@@ -224,7 +224,6 @@ static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
 static int longrun_cpu_init(struct cpufreq_policy *policy)
 {
 	int                     result = 0;
-	struct cpuinfo_x86 *c = cpu_data;
 
 	/* capability check */
 	if (policy->cpu != 0)

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

@@ -142,7 +142,6 @@ static int powernow_k6_target (struct cpufreq_policy *policy,
 
 static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
 {
-	struct cpuinfo_x86 *c = cpu_data;
 	unsigned int i;
 
 	if (policy->cpu != 0)

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

@@ -208,13 +208,38 @@ static int get_ranges (unsigned char *pst)
 }
 
 
+static void change_FID(int fid)
+{
+	union msr_fidvidctl fidvidctl;
+
+	if (fidvidctl.bits.FID != fid) {
+		rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
+		fidvidctl.bits.SGTC = latency;
+		fidvidctl.bits.FID = fid;
+		fidvidctl.bits.FIDC = 1;
+		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
+	}
+}
+
+
+static void change_VID(int vid)
+{
+	union msr_fidvidctl fidvidctl;
+
+	if (fidvidctl.bits.VID != vid) {
+		rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
+		fidvidctl.bits.VID = vid;
+		fidvidctl.bits.VIDC = 1;
+		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
+	}
+}
+
+
 static void change_speed (unsigned int index)
 {
 	u8 fid, vid;
 	struct cpufreq_freqs freqs;
 	union msr_fidvidstatus fidvidstatus;
-	union msr_fidvidctl fidvidctl;
-
 
 	/* fid are the lower 8 bits of the index we stored into
 	 * the cpufreq frequency table in powernow_decode_bios,
@@ -228,7 +253,6 @@ static void change_speed (unsigned int index)
 
 	rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
 	freqs.old = fsb * fid_codes[fidvidstatus.bits.CFID] * 100;
-
 	freqs.new = powernow_table[index].frequency;
 
 	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
@@ -238,22 +262,16 @@ static void change_speed (unsigned int index)
 	if (have_a0 == 1)	/* A0 errata 5 */
 		__asm__("\tcli\n");
 
-	/* First change the frequency. */
-	if (fidvidctl.bits.FID != fid) {
-		rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
-		fidvidctl.bits.SGTC = latency;	/* Stop grant timeout counter */
-		fidvidctl.bits.FID = fid;
-		fidvidctl.bits.FIDC = 1;
-		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
+	if (freqs.old > freqs.new) {
+		/* Going down, so change FID first */
+		change_FID(fid);
+		change_VID(vid);
+	} else {
+		/* Going up, so change VID first */
+		change_VID(fid);
+		change_FID(vid);
 	}
 	
-	/* Now change voltage. */
-	if (fidvidctl.bits.VID != vid) {
-		rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
-		fidvidctl.bits.VID = vid;
-		fidvidctl.bits.VIDC = 1;
-		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
-	}
 
 	if (have_a0 == 1)
 		__asm__("\tsti\n");

arch/i386/kernel/dmi_scan.c

@@ -12,6 +12,8 @@
 #include <linux/bootmem.h>
 
 unsigned long dmi_broken;
+EXPORT_SYMBOL(dmi_broken);
+
 int is_sony_vaio_laptop;
 int is_unsafe_smbus;
 

drivers/acpi/processor.c

@@ -85,7 +85,7 @@ static int acpi_processor_info_open_fs(struct inode *inode, struct file *file);
 static int acpi_processor_throttling_open_fs(struct inode *inode, struct file *file);
 static int acpi_processor_power_open_fs(struct inode *inode, struct file *file);
 static int acpi_processor_limit_open_fs(struct inode *inode, struct file *file);
-
+static int acpi_processor_get_limit_info(struct acpi_processor *pr);
 
 static struct acpi_driver acpi_processor_driver = {
 	.name =		ACPI_PROCESSOR_DRIVER_NAME,
@@ -770,6 +770,8 @@ acpi_processor_get_platform_limit (
 
 	pr->performance_platform_limit = (int) ppc;
 	
+	acpi_processor_get_limit_info(pr);
+	
 	return_VALUE(0);
 }
 EXPORT_SYMBOL(acpi_processor_get_platform_limit);
@@ -790,6 +792,7 @@ acpi_processor_register_performance (
 		return_VALUE(-EBUSY);
 
 	(*pr)->performance = performance;
+	performance->pr = *pr;
 	return 0;
 }
 EXPORT_SYMBOL(acpi_processor_register_performance);

drivers/cpufreq/proc_intf.c

@@ -209,9 +209,6 @@ static int __init cpufreq_proc_init (void)
 {
 	struct proc_dir_entry *entry = NULL;
 
-	if (!cpufreq_driver)
-		return -ENODEV;
-
 	/* are these acceptable values? */
 	entry = create_proc_entry("cpufreq", S_IFREG|S_IRUGO|S_IWUSR, 
 				  &proc_root);

kernel/cpufreq.c

@@ -29,12 +29,9 @@
  * level driver of CPUFreq support, and its locking mutex. 
  * cpu_max_freq is in kHz.
  */
-struct cpufreq_driver   	*cpufreq_driver;
+static struct cpufreq_driver   	*cpufreq_driver;
 static DECLARE_MUTEX            (cpufreq_driver_sem);
 
-/* required for the proc interface, remove when that goes away */
-EXPORT_SYMBOL_GPL(cpufreq_driver);
-
 /**
  * Two notifier lists: the "policy" list is involved in the 
  * validation process for a new CPU frequency policy; the 
@@ -54,10 +51,14 @@ static DECLARE_MUTEX		(cpufreq_governor_sem);
 
 static struct class_interface cpufreq_interface;
 
-static int cpufreq_cpu_get(unsigned int cpu) {
+static int cpufreq_cpu_get(unsigned int cpu)
+{
 	if (cpu >= NR_CPUS)
 		return 0;
 
+	if (!cpufreq_driver)
+		return 0;
+
 	if (!try_module_get(cpufreq_driver->owner))
 		return 0;
 
@@ -69,7 +70,8 @@ static int cpufreq_cpu_get(unsigned int cpu) {
 	return 1;
 }
 
-static void cpufreq_cpu_put(unsigned int cpu) {
+static void cpufreq_cpu_put(unsigned int cpu)
+{
 	kobject_put(&cpufreq_driver->policy[cpu].kobj);
 	module_put(cpufreq_driver->owner);
 }
@@ -81,7 +83,8 @@ static void cpufreq_cpu_put(unsigned int cpu) {
 /**
  * cpufreq_parse_governor - parse a governor string
  */
-int cpufreq_parse_governor (char *str_governor, unsigned int *policy, struct cpufreq_governor **governor)
+int cpufreq_parse_governor (char *str_governor, unsigned int *policy,
+				struct cpufreq_governor **governor)
 {
 	if (!strnicmp(str_governor, "performance", CPUFREQ_NAME_LEN)) {
 		*policy = CPUFREQ_POLICY_PERFORMANCE;
@@ -230,7 +233,8 @@ static ssize_t show_scaling_driver (struct cpufreq_policy * policy, char *buf)
 /**
  * show_scaling_available_governors - show the available CPUfreq governors
  */
-static ssize_t show_scaling_available_governors(struct cpufreq_policy * policy, char *buf)
+static ssize_t show_scaling_available_governors (struct cpufreq_policy * policy,
+				char *buf)
 {
 	ssize_t i = 0;
 	struct cpufreq_governor *t;