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 9a02f71c6b1f..152b5f29d048 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 d959c84904be..20678a9ed11a 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 2d9d5279b981..000000000000
--- 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 4838f2a57c7a..000000000000
--- 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 4700fef8d1fa..000000000000
--- 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);
-