cpufreq: ia64: move cpufreq driver to drivers/cpufreq

This patch moves cpufreq driver of IA64 architecture to drivers/cpufreq.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

5 files changed, 3 insertions, 474 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 9a02f71..152b5f2 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -591,9 +591,9 @@ source "kernel/power/Kconfig"
 source "drivers/acpi/Kconfig"
 
 if PM
-
-source "arch/ia64/kernel/cpufreq/Kconfig"
-
+menu "CPU Frequency scaling"
+source "drivers/cpufreq/Kconfig"
+endmenu
 endif
 
 endmenu
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index d959c84..20678a9 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -23,7 +23,6 @@ obj-$(CONFIG_SMP)		+= smp.o smpboot.o
 obj-$(CONFIG_NUMA)		+= numa.o
 obj-$(CONFIG_PERFMON)		+= perfmon_default_smpl.o
 obj-$(CONFIG_IA64_CYCLONE)	+= cyclone.o
-obj-$(CONFIG_CPU_FREQ)		+= cpufreq/
 obj-$(CONFIG_IA64_MCA_RECOVERY)	+= mca_recovery.o
 obj-$(CONFIG_KPROBES)		+= kprobes.o jprobes.o
 obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o
diff --git a/arch/ia64/kernel/cpufreq/Kconfig b/arch/ia64/kernel/cpufreq/Kconfig
deleted file mode 100644
index 2d9d527..0000000
--- a/arch/ia64/kernel/cpufreq/Kconfig
+++ /dev/null
@@ -1,29 +0,0 @@
-
-#
-# CPU Frequency scaling
-#
-
-menu "CPU Frequency scaling"
-
-source "drivers/cpufreq/Kconfig"
-
-if CPU_FREQ
-
-comment "CPUFreq processor drivers"
-
-config IA64_ACPI_CPUFREQ
-	tristate "ACPI Processor P-States driver"
-	select CPU_FREQ_TABLE
-	depends on ACPI_PROCESSOR
-	help
-	This driver adds a CPUFreq driver which utilizes the ACPI
-	Processor Performance States.
-
-	For details, take a look at <file:Documentation/cpu-freq/>.
-
-	If in doubt, say N.
-
-endif   # CPU_FREQ
-
-endmenu
-
diff --git a/arch/ia64/kernel/cpufreq/Makefile b/arch/ia64/kernel/cpufreq/Makefile
deleted file mode 100644
index 4838f2a..0000000
--- a/arch/ia64/kernel/cpufreq/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
-obj-$(CONFIG_IA64_ACPI_CPUFREQ)		+= acpi-cpufreq.o
-
diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
deleted file mode 100644
index 4700fef..0000000
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ /dev/null
@@ -1,439 +0,0 @@
-/*
- * arch/ia64/kernel/cpufreq/acpi-cpufreq.c
- * This file provides the ACPI based P-state support. This
- * module works with generic cpufreq infrastructure. Most of
- * the code is based on i386 version
- * (arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c)
- *
- * Copyright (C) 2005 Intel Corp
- *      Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/pal.h>
-
-#include <linux/acpi.h>
-#include <acpi/processor.h>
-
-MODULE_AUTHOR("Venkatesh Pallipadi");
-MODULE_DESCRIPTION("ACPI Processor P-States Driver");
-MODULE_LICENSE("GPL");
-
-
-struct cpufreq_acpi_io {
-	struct acpi_processor_performance	acpi_data;
-	struct cpufreq_frequency_table		*freq_table;
-	unsigned int				resume;
-};
-
-static struct cpufreq_acpi_io	*acpi_io_data[NR_CPUS];
-
-static struct cpufreq_driver acpi_cpufreq_driver;
-
-
-static int
-processor_set_pstate (
-	u32	value)
-{
-	s64 retval;
-
-	pr_debug("processor_set_pstate\n");
-
-	retval = ia64_pal_set_pstate((u64)value);
-
-	if (retval) {
-		pr_debug("Failed to set freq to 0x%x, with error 0x%lx\n",
-		        value, retval);
-		return -ENODEV;
-	}
-	return (int)retval;
-}
-
-
-static int
-processor_get_pstate (
-	u32	*value)
-{
-	u64	pstate_index = 0;
-	s64 	retval;
-
-	pr_debug("processor_get_pstate\n");
-
-	retval = ia64_pal_get_pstate(&pstate_index,
-	                             PAL_GET_PSTATE_TYPE_INSTANT);
-	*value = (u32) pstate_index;
-
-	if (retval)
-		pr_debug("Failed to get current freq with "
-			"error 0x%lx, idx 0x%x\n", retval, *value);
-
-	return (int)retval;
-}
-
-
-/* To be used only after data->acpi_data is initialized */
-static unsigned
-extract_clock (
-	struct cpufreq_acpi_io *data,
-	unsigned value,
-	unsigned int cpu)
-{
-	unsigned long i;
-
-	pr_debug("extract_clock\n");
-
-	for (i = 0; i < data->acpi_data.state_count; i++) {
-		if (value == data->acpi_data.states[i].status)
-			return data->acpi_data.states[i].core_frequency;
-	}
-	return data->acpi_data.states[i-1].core_frequency;
-}
-
-
-static unsigned int
-processor_get_freq (
-	struct cpufreq_acpi_io	*data,
-	unsigned int		cpu)
-{
-	int			ret = 0;
-	u32			value = 0;
-	cpumask_t		saved_mask;
-	unsigned long 		clock_freq;
-
-	pr_debug("processor_get_freq\n");
-
-	saved_mask = current->cpus_allowed;
-	set_cpus_allowed_ptr(current, cpumask_of(cpu));
-	if (smp_processor_id() != cpu)
-		goto migrate_end;
-
-	/* processor_get_pstate gets the instantaneous frequency */
-	ret = processor_get_pstate(&value);
-
-	if (ret) {
-		set_cpus_allowed_ptr(current, &saved_mask);
-		printk(KERN_WARNING "get performance failed with error %d\n",
-		       ret);
-		ret = 0;
-		goto migrate_end;
-	}
-	clock_freq = extract_clock(data, value, cpu);
-	ret = (clock_freq*1000);
-
-migrate_end:
-	set_cpus_allowed_ptr(current, &saved_mask);
-	return ret;
-}
-
-
-static int
-processor_set_freq (
-	struct cpufreq_acpi_io	*data,
-	struct cpufreq_policy   *policy,
-	int			state)
-{
-	int			ret = 0;
-	u32			value = 0;
-	struct cpufreq_freqs    cpufreq_freqs;
-	cpumask_t		saved_mask;
-	int			retval;
-
-	pr_debug("processor_set_freq\n");
-
-	saved_mask = current->cpus_allowed;
-	set_cpus_allowed_ptr(current, cpumask_of(policy->cpu));
-	if (smp_processor_id() != policy->cpu) {
-		retval = -EAGAIN;
-		goto migrate_end;
-	}
-
-	if (state == data->acpi_data.state) {
-		if (unlikely(data->resume)) {
-			pr_debug("Called after resume, resetting to P%d\n", state);
-			data->resume = 0;
-		} else {
-			pr_debug("Already at target state (P%d)\n", state);
-			retval = 0;
-			goto migrate_end;
-		}
-	}
-
-	pr_debug("Transitioning from P%d to P%d\n",
-		data->acpi_data.state, state);
-
-	/* cpufreq frequency struct */
-	cpufreq_freqs.old = data->freq_table[data->acpi_data.state].frequency;
-	cpufreq_freqs.new = data->freq_table[state].frequency;
-
-	/* notify cpufreq */
-	cpufreq_notify_transition(policy, &cpufreq_freqs, CPUFREQ_PRECHANGE);
-
-	/*
-	 * First we write the target state's 'control' value to the
-	 * control_register.
-	 */
-
-	value = (u32) data->acpi_data.states[state].control;
-
-	pr_debug("Transitioning to state: 0x%08x\n", value);
-
-	ret = processor_set_pstate(value);
-	if (ret) {
-		unsigned int tmp = cpufreq_freqs.new;
-		cpufreq_notify_transition(policy, &cpufreq_freqs,
-				CPUFREQ_POSTCHANGE);
-		cpufreq_freqs.new = cpufreq_freqs.old;
-		cpufreq_freqs.old = tmp;
-		cpufreq_notify_transition(policy, &cpufreq_freqs,
-				CPUFREQ_PRECHANGE);
-		cpufreq_notify_transition(policy, &cpufreq_freqs,
-				CPUFREQ_POSTCHANGE);
-		printk(KERN_WARNING "Transition failed with error %d\n", ret);
-		retval = -ENODEV;
-		goto migrate_end;
-	}
-
-	cpufreq_notify_transition(policy, &cpufreq_freqs, CPUFREQ_POSTCHANGE);
-
-	data->acpi_data.state = state;
-
-	retval = 0;
-
-migrate_end:
-	set_cpus_allowed_ptr(current, &saved_mask);
-	return (retval);
-}
-
-
-static unsigned int
-acpi_cpufreq_get (
-	unsigned int		cpu)
-{
-	struct cpufreq_acpi_io *data = acpi_io_data[cpu];
-
-	pr_debug("acpi_cpufreq_get\n");
-
-	return processor_get_freq(data, cpu);
-}
-
-
-static int
-acpi_cpufreq_target (
-	struct cpufreq_policy   *policy,
-	unsigned int target_freq,
-	unsigned int relation)
-{
-	struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
-	unsigned int next_state = 0;
-	unsigned int result = 0;
-
-	pr_debug("acpi_cpufreq_setpolicy\n");
-
-	result = cpufreq_frequency_table_target(policy,
-			data->freq_table, target_freq, relation, &next_state);
-	if (result)
-		return (result);
-
-	result = processor_set_freq(data, policy, next_state);
-
-	return (result);
-}
-
-
-static int
-acpi_cpufreq_verify (
-	struct cpufreq_policy   *policy)
-{
-	unsigned int result = 0;
-	struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
-
-	pr_debug("acpi_cpufreq_verify\n");
-
-	result = cpufreq_frequency_table_verify(policy,
-			data->freq_table);
-
-	return (result);
-}
-
-
-static int
-acpi_cpufreq_cpu_init (
-	struct cpufreq_policy   *policy)
-{
-	unsigned int		i;
-	unsigned int		cpu = policy->cpu;
-	struct cpufreq_acpi_io	*data;
-	unsigned int		result = 0;
-
-	pr_debug("acpi_cpufreq_cpu_init\n");
-
-	data = kzalloc(sizeof(struct cpufreq_acpi_io), GFP_KERNEL);
-	if (!data)
-		return (-ENOMEM);
-
-	acpi_io_data[cpu] = data;
-
-	result = acpi_processor_register_performance(&data->acpi_data, cpu);
-
-	if (result)
-		goto err_free;
-
-	/* capability check */
-	if (data->acpi_data.state_count <= 1) {
-		pr_debug("No P-States\n");
-		result = -ENODEV;
-		goto err_unreg;
-	}
-
-	if ((data->acpi_data.control_register.space_id !=
-					ACPI_ADR_SPACE_FIXED_HARDWARE) ||
-	    (data->acpi_data.status_register.space_id !=
-					ACPI_ADR_SPACE_FIXED_HARDWARE)) {
-		pr_debug("Unsupported address space [%d, %d]\n",
-			(u32) (data->acpi_data.control_register.space_id),
-			(u32) (data->acpi_data.status_register.space_id));
-		result = -ENODEV;
-		goto err_unreg;
-	}
-
-	/* alloc freq_table */
-	data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) *
-	                           (data->acpi_data.state_count + 1),
-	                           GFP_KERNEL);
-	if (!data->freq_table) {
-		result = -ENOMEM;
-		goto err_unreg;
-	}
-
-	/* detect transition latency */
-	policy->cpuinfo.transition_latency = 0;
-	for (i=0; i<data->acpi_data.state_count; i++) {
-		if ((data->acpi_data.states[i].transition_latency * 1000) >
-		    policy->cpuinfo.transition_latency) {
-			policy->cpuinfo.transition_latency =
-			    data->acpi_data.states[i].transition_latency * 1000;
-		}
-	}
-	policy->cur = processor_get_freq(data, policy->cpu);
-
-	/* table init */
-	for (i = 0; i <= data->acpi_data.state_count; i++)
-	{
-		data->freq_table[i].index = i;
-		if (i < data->acpi_data.state_count) {
-			data->freq_table[i].frequency =
-			      data->acpi_data.states[i].core_frequency * 1000;
-		} else {
-			data->freq_table[i].frequency = CPUFREQ_TABLE_END;
-		}
-	}
-
-	result = cpufreq_frequency_table_cpuinfo(policy, data->freq_table);
-	if (result) {
-		goto err_freqfree;
-	}
-
-	/* notify BIOS that we exist */
-	acpi_processor_notify_smm(THIS_MODULE);
-
-	printk(KERN_INFO "acpi-cpufreq: CPU%u - ACPI performance management "
-	       "activated.\n", cpu);
-
-	for (i = 0; i < data->acpi_data.state_count; i++)
-		pr_debug("     %cP%d: %d MHz, %d mW, %d uS, %d uS, 0x%x 0x%x\n",
-			(i == data->acpi_data.state?'*':' '), i,
-			(u32) data->acpi_data.states[i].core_frequency,
-			(u32) data->acpi_data.states[i].power,
-			(u32) data->acpi_data.states[i].transition_latency,
-			(u32) data->acpi_data.states[i].bus_master_latency,
-			(u32) data->acpi_data.states[i].status,
-			(u32) data->acpi_data.states[i].control);
-
-	cpufreq_frequency_table_get_attr(data->freq_table, policy->cpu);
-
-	/* the first call to ->target() should result in us actually
-	 * writing something to the appropriate registers. */
-	data->resume = 1;
-
-	return (result);
-
- err_freqfree:
-	kfree(data->freq_table);
- err_unreg:
-	acpi_processor_unregister_performance(&data->acpi_data, cpu);
- err_free:
-	kfree(data);
-	acpi_io_data[cpu] = NULL;
-
-	return (result);
-}
-
-
-static int
-acpi_cpufreq_cpu_exit (
-	struct cpufreq_policy   *policy)
-{
-	struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
-
-	pr_debug("acpi_cpufreq_cpu_exit\n");
-
-	if (data) {
-		cpufreq_frequency_table_put_attr(policy->cpu);
-		acpi_io_data[policy->cpu] = NULL;
-		acpi_processor_unregister_performance(&data->acpi_data,
-		                                      policy->cpu);
-		kfree(data);
-	}
-
-	return (0);
-}
-
-
-static struct freq_attr* acpi_cpufreq_attr[] = {
-	&cpufreq_freq_attr_scaling_available_freqs,
-	NULL,
-};
-
-
-static struct cpufreq_driver acpi_cpufreq_driver = {
-	.verify 	= acpi_cpufreq_verify,
-	.target 	= acpi_cpufreq_target,
-	.get 		= acpi_cpufreq_get,
-	.init		= acpi_cpufreq_cpu_init,
-	.exit		= acpi_cpufreq_cpu_exit,
-	.name		= "acpi-cpufreq",
-	.owner		= THIS_MODULE,
-	.attr           = acpi_cpufreq_attr,
-};
-
-
-static int __init
-acpi_cpufreq_init (void)
-{
-	pr_debug("acpi_cpufreq_init\n");
-
- 	return cpufreq_register_driver(&acpi_cpufreq_driver);
-}
-
-
-static void __exit
-acpi_cpufreq_exit (void)
-{
-	pr_debug("acpi_cpufreq_exit\n");
-
-	cpufreq_unregister_driver(&acpi_cpufreq_driver);
-	return;
-}
-
-
-late_initcall(acpi_cpufreq_init);
-module_exit(acpi_cpufreq_exit);
-