cpufreq: mips: move cpufreq driver to drivers/cpufreq

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

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

5 files changed, 8 insertions, 297 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index cd2e21ff562a..22e8417b4fc7 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2539,7 +2539,14 @@ source "kernel/power/Kconfig"
 
 endmenu
 
-source "arch/mips/kernel/cpufreq/Kconfig"
+config MIPS_EXTERNAL_TIMER
+        bool
+
+if CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER
+menu "CPU Power Management"
+source "drivers/cpufreq/Kconfig"
+endmenu
+endif
 
 source "net/Kconfig"
 
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index f81d98f6184c..c69ca653b071 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -92,8 +92,6 @@ CFLAGS_cpu-bugs64.o	= $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/n
 
 obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT)   += 8250-platform.o
 
-obj-$(CONFIG_MIPS_CPUFREQ)      += cpufreq/
-
 obj-$(CONFIG_PERF_EVENTS)       += perf_event.o
 obj-$(CONFIG_HW_PERF_EVENTS)    += perf_event_mipsxx.o
 
diff --git a/arch/mips/kernel/cpufreq/Kconfig b/arch/mips/kernel/cpufreq/Kconfig
deleted file mode 100644
index 58c601eee6fd..000000000000
--- a/arch/mips/kernel/cpufreq/Kconfig
+++ /dev/null
@@ -1,41 +0,0 @@
-#
-# CPU Frequency scaling
-#
-
-config MIPS_EXTERNAL_TIMER
-        bool
-
-config MIPS_CPUFREQ
-        bool
-        default y
-        depends on CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER
-
-if MIPS_CPUFREQ
-
-menu "CPU Frequency scaling"
-
-source "drivers/cpufreq/Kconfig"
-
-if CPU_FREQ
-
-comment "CPUFreq processor drivers"
-
-config LOONGSON2_CPUFREQ
-        tristate "Loongson2 CPUFreq Driver"
-        select CPU_FREQ_TABLE
-        depends on MIPS_CPUFREQ
-        help
-          This option adds a CPUFreq driver for loongson processors which
-          support software configurable cpu frequency.
-
-          Loongson2F and it's successors support this feature.
-
-          For details, take a look at <file:Documentation/cpu-freq/>.
-
-          If in doubt, say N.
-
-endif   # CPU_FREQ
-
-endmenu
-
-endif   # MIPS_CPUFREQ
diff --git a/arch/mips/kernel/cpufreq/Makefile b/arch/mips/kernel/cpufreq/Makefile
deleted file mode 100644
index 05a5715ee38c..000000000000
--- a/arch/mips/kernel/cpufreq/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-#
-# Makefile for the Linux/MIPS cpufreq.
-#
-
-obj-$(CONFIG_LOONGSON2_CPUFREQ) += loongson2_cpufreq.o
diff --git a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c b/arch/mips/kernel/cpufreq/loongson2_cpufreq.c
deleted file mode 100644
index 84889573b566..000000000000
--- a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c
+++ /dev/null
@@ -1,248 +0,0 @@
-/*
- * Cpufreq driver for the loongson-2 processors
- *
- * The 2E revision of loongson processor not support this feature.
- *
- * Copyright (C) 2006 - 2008 Lemote Inc. & Insititute of Computing Technology
- * Author: Yanhua, yanh@lemote.com
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/cpufreq.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/sched.h>        /* set_cpus_allowed() */
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-
-#include <asm/clock.h>
-
-#include <asm/mach-loongson/loongson.h>
-
-static uint nowait;
-
-static struct clk *cpuclk;
-
-static void (*saved_cpu_wait) (void);
-
-static int loongson2_cpu_freq_notifier(struct notifier_block *nb,
-                                        unsigned long val, void *data);
-
-static struct notifier_block loongson2_cpufreq_notifier_block = {
-        .notifier_call = loongson2_cpu_freq_notifier
-};
-
-static int loongson2_cpu_freq_notifier(struct notifier_block *nb,
-                                        unsigned long val, void *data)
-{
-        if (val == CPUFREQ_POSTCHANGE)
-                current_cpu_data.udelay_val = loops_per_jiffy;
-
-        return 0;
-}
-
-static unsigned int loongson2_cpufreq_get(unsigned int cpu)
-{
-        return clk_get_rate(cpuclk);
-}
-
-/*
- * Here we notify other drivers of the proposed change and the final change.
- */
-static int loongson2_cpufreq_target(struct cpufreq_policy *policy,
-                                     unsigned int target_freq,
-                                     unsigned int relation)
-{
-        unsigned int cpu = policy->cpu;
-        unsigned int newstate = 0;
-        cpumask_t cpus_allowed;
-        struct cpufreq_freqs freqs;
-        unsigned int freq;
-
-        cpus_allowed = current->cpus_allowed;
-        set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
-        if (cpufreq_frequency_table_target
-            (policy, &loongson2_clockmod_table[0], target_freq, relation,
-             &newstate))
-                return -EINVAL;
-
-        freq =
-            ((cpu_clock_freq / 1000) *
-             loongson2_clockmod_table[newstate].index) / 8;
-        if (freq < policy->min || freq > policy->max)
-                return -EINVAL;
-
-        pr_debug("cpufreq: requested frequency %u Hz\n", target_freq * 1000);
-
-        freqs.old = loongson2_cpufreq_get(cpu);
-        freqs.new = freq;
-        freqs.flags = 0;
-
-        if (freqs.new == freqs.old)
-                return 0;
-
-        /* notifiers */
-        cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
-        set_cpus_allowed_ptr(current, &cpus_allowed);
-
-        /* setting the cpu frequency */
-        clk_set_rate(cpuclk, freq);
-
-        /* notifiers */
-        cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
-        pr_debug("cpufreq: set frequency %u kHz\n", freq);
-
-        return 0;
-}
-
-static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
-        int i;
-        unsigned long rate;
-        int ret;
-
-        cpuclk = clk_get(NULL, "cpu_clk");
-        if (IS_ERR(cpuclk)) {
-                printk(KERN_ERR "cpufreq: couldn't get CPU clk\n");
-                return PTR_ERR(cpuclk);
-        }
-
-        rate = cpu_clock_freq / 1000;
-        if (!rate) {
-                clk_put(cpuclk);
-                return -EINVAL;
-        }
-        ret = clk_set_rate(cpuclk, rate);
-        if (ret) {
-                clk_put(cpuclk);
-                return ret;
-        }
-
-        /* clock table init */
-        for (i = 2;
-             (loongson2_clockmod_table[i].frequency != CPUFREQ_TABLE_END);
-             i++)
-                loongson2_clockmod_table[i].frequency = (rate * i) / 8;
-
-        policy->cur = loongson2_cpufreq_get(policy->cpu);
-
-        cpufreq_frequency_table_get_attr(&loongson2_clockmod_table[0],
-                                         policy->cpu);
-
-        return cpufreq_frequency_table_cpuinfo(policy,
-                                            &loongson2_clockmod_table[0]);
-}
-
-static int loongson2_cpufreq_verify(struct cpufreq_policy *policy)
-{
-        return cpufreq_frequency_table_verify(policy,
-                                              &loongson2_clockmod_table[0]);
-}
-
-static int loongson2_cpufreq_exit(struct cpufreq_policy *policy)
-{
-        clk_put(cpuclk);
-        return 0;
-}
-
-static struct freq_attr *loongson2_table_attr[] = {
-        &cpufreq_freq_attr_scaling_available_freqs,
-        NULL,
-};
-
-static struct cpufreq_driver loongson2_cpufreq_driver = {
-        .owner = THIS_MODULE,
-        .name = "loongson2",
-        .init = loongson2_cpufreq_cpu_init,
-        .verify = loongson2_cpufreq_verify,
-        .target = loongson2_cpufreq_target,
-        .get = loongson2_cpufreq_get,
-        .exit = loongson2_cpufreq_exit,
-        .attr = loongson2_table_attr,
-};
-
-static struct platform_device_id platform_device_ids[] = {
-        {
-                .name = "loongson2_cpufreq",
-        },
-        {}
-};
-
-MODULE_DEVICE_TABLE(platform, platform_device_ids);
-
-static struct platform_driver platform_driver = {
-        .driver = {
-                .name = "loongson2_cpufreq",
-                .owner = THIS_MODULE,
-        },
-        .id_table = platform_device_ids,
-};
-
-/*
- * This is the simple version of Loongson-2 wait, Maybe we need do this in
- * interrupt disabled context.
- */
-
-static DEFINE_SPINLOCK(loongson2_wait_lock);
-
-static void loongson2_cpu_wait(void)
-{
-        unsigned long flags;
-        u32 cpu_freq;
-
-        spin_lock_irqsave(&loongson2_wait_lock, flags);
-        cpu_freq = LOONGSON_CHIPCFG0;
-        LOONGSON_CHIPCFG0 &= ~0x7;      /* Put CPU into wait mode */
-        LOONGSON_CHIPCFG0 = cpu_freq;   /* Restore CPU state */
-        spin_unlock_irqrestore(&loongson2_wait_lock, flags);
-}
-
-static int __init cpufreq_init(void)
-{
-        int ret;
-
-        /* Register platform stuff */
-        ret = platform_driver_register(&platform_driver);
-        if (ret)
-                return ret;
-
-        pr_info("cpufreq: Loongson-2F CPU frequency driver.\n");
-
-        cpufreq_register_notifier(&loongson2_cpufreq_notifier_block,
-                                  CPUFREQ_TRANSITION_NOTIFIER);
-
-        ret = cpufreq_register_driver(&loongson2_cpufreq_driver);
-
-        if (!ret && !nowait) {
-                saved_cpu_wait = cpu_wait;
-                cpu_wait = loongson2_cpu_wait;
-        }
-
-        return ret;
-}
-
-static void __exit cpufreq_exit(void)
-{
-        if (!nowait && saved_cpu_wait)
-                cpu_wait = saved_cpu_wait;
-        cpufreq_unregister_driver(&loongson2_cpufreq_driver);
-        cpufreq_unregister_notifier(&loongson2_cpufreq_notifier_block,
-                                    CPUFREQ_TRANSITION_NOTIFIER);
-
-        platform_driver_unregister(&platform_driver);
-}
-
-module_init(cpufreq_init);
-module_exit(cpufreq_exit);
-
-module_param(nowait, uint, 0644);
-MODULE_PARM_DESC(nowait, "Disable Loongson-2F specific wait");
-
-MODULE_AUTHOR("Yanhua <yanh@lemote.com>");
-MODULE_DESCRIPTION("cpufreq driver for Loongson2F");
-MODULE_LICENSE("GPL");