mach-ux500: move CPUfreq driver to cpufreq subsystem

As part of the ARM arch subsystem migration, move the DB8500
cpufreq driver to drivers/cpufreq as discussed with Dave Jones. The
Makefile is not updated in order to avoid cross-subsystem conflicts
for this file in merges.

Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 0 insertions, 210 deletions

diff --git a/arch/arm/mach-ux500/cpufreq.c b/arch/arm/mach-ux500/cpufreq.c
deleted file mode 100644
index d196939fcdb..00000000000
--- a/arch/arm/mach-ux500/cpufreq.c
+++ /dev/null
@@ -1,210 +0,0 @@
-/*
- * CPU frequency scaling for u8500
- * Inspired by linux/arch/arm/mach-davinci/cpufreq.c
- *
- * Copyright (C) STMicroelectronics 2009
- * Copyright (C) ST-Ericsson SA 2010
- *
- * License Terms: GNU General Public License v2
- *
- * Author: Sundar Iyer <sundar.iyer@stericsson.com>
- * Author: Martin Persson <martin.persson@stericsson.com>
- * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
- *
- */
-
-#include <linux/platform_device.h>
-#include <linux/kernel.h>
-#include <linux/cpufreq.h>
-#include <linux/delay.h>
-#include <linux/mfd/db8500-prcmu.h>
-
-#include <mach/hardware.h>
-
-#define DRIVER_NAME "cpufreq-u8500"
-#define CPUFREQ_NAME "u8500"
-
-static struct device *dev;
-
-static struct cpufreq_frequency_table freq_table[] = {
-        [0] = {
-                .index = 0,
-                .frequency = 200000,
-        },
-        [1] = {
-                .index = 1,
-                .frequency = 300000,
-        },
-        [2] = {
-                .index = 2,
-                .frequency = 600000,
-        },
-        [3] = {
-                /* Used for CPU_OPP_MAX, if available */
-                .index = 3,
-                .frequency = CPUFREQ_TABLE_END,
-        },
-        [4] = {
-                .index = 4,
-                .frequency = CPUFREQ_TABLE_END,
-        },
-};
-
-static enum prcmu_cpu_opp index2opp[] = {
-        CPU_OPP_EXT_CLK,
-        CPU_OPP_50,
-        CPU_OPP_100,
-        CPU_OPP_MAX
-};
-
-static int u8500_cpufreq_verify_speed(struct cpufreq_policy *policy)
-{
-        return cpufreq_frequency_table_verify(policy, freq_table);
-}
-
-static int u8500_cpufreq_target(struct cpufreq_policy *policy,
-                                unsigned int target_freq,
-                                unsigned int relation)
-{
-        struct cpufreq_freqs freqs;
-        unsigned int index;
-        int ret = 0;
-
-        /*
-         * Ensure desired rate is within allowed range.  Some govenors
-         * (ondemand) will just pass target_freq=0 to get the minimum.
-         */
-        if (target_freq < policy->cpuinfo.min_freq)
-                target_freq = policy->cpuinfo.min_freq;
-        if (target_freq > policy->cpuinfo.max_freq)
-                target_freq = policy->cpuinfo.max_freq;
-
-        ret = cpufreq_frequency_table_target(policy, freq_table,
-                                             target_freq, relation, &index);
-        if (ret < 0) {
-                dev_err(dev, "Could not look up next frequency\n");
-                return ret;
-        }
-
-        freqs.old = policy->cur;
-        freqs.new = freq_table[index].frequency;
-        freqs.cpu = policy->cpu;
-
-        if (freqs.old == freqs.new) {
-                dev_dbg(dev, "Current and target frequencies are equal\n");
-                return 0;
-        }
-
-        dev_dbg(dev, "transition: %u --> %u\n", freqs.old, freqs.new);
-        cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
-        ret = prcmu_set_cpu_opp(index2opp[index]);
-        if (ret < 0) {
-                dev_err(dev, "Failed to set OPP level\n");
-                return ret;
-        }
-
-        cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
-        return ret;
-}
-
-static unsigned int u8500_cpufreq_getspeed(unsigned int cpu)
-{
-        int i;
-
-        for (i = 0; prcmu_get_cpu_opp() != index2opp[i]; i++)
-                ;
-        return freq_table[i].frequency;
-}
-
-static int __cpuinit u8500_cpu_init(struct cpufreq_policy *policy)
-{
-        int res;
-
-        BUILD_BUG_ON(ARRAY_SIZE(index2opp) + 1 != ARRAY_SIZE(freq_table));
-
-        if (cpu_is_u8500v2()) {
-                freq_table[1].frequency = 400000;
-                freq_table[2].frequency = 800000;
-                if (prcmu_has_arm_maxopp())
-                        freq_table[3].frequency = 1000000;
-        }
-
-        /* get policy fields based on the table */
-        res = cpufreq_frequency_table_cpuinfo(policy, freq_table);
-        if (!res)
-                cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
-        else {
-                dev_err(dev, "u8500-cpufreq : Failed to read policy table\n");
-                return res;
-        }
-
-        policy->min = policy->cpuinfo.min_freq;
-        policy->max = policy->cpuinfo.max_freq;
-        policy->cur = u8500_cpufreq_getspeed(policy->cpu);
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
-        /*
-         * FIXME : Need to take time measurement across the target()
-         *         function with no/some/all drivers in the notification
-         *         list.
-         */
-        policy->cpuinfo.transition_latency = 200 * 1000; /* in ns */
-
-        /* policy sharing between dual CPUs */
-        cpumask_copy(policy->cpus, &cpu_present_map);
-
-        policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
-
-        return res;
-}
-
-static struct freq_attr *u8500_cpufreq_attr[] = {
-        &cpufreq_freq_attr_scaling_available_freqs,
-        NULL,
-};
-static int u8500_cpu_exit(struct cpufreq_policy *policy)
-{
-        cpufreq_frequency_table_put_attr(policy->cpu);
-        return 0;
-}
-
-static struct cpufreq_driver u8500_driver = {
-        .owner = THIS_MODULE,
-        .flags = CPUFREQ_STICKY,
-        .verify = u8500_cpufreq_verify_speed,
-        .target = u8500_cpufreq_target,
-        .get = u8500_cpufreq_getspeed,
-        .init = u8500_cpu_init,
-        .exit = u8500_cpu_exit,
-        .name = CPUFREQ_NAME,
-        .attr = u8500_cpufreq_attr,
-};
-
-static int __init u8500_cpufreq_probe(struct platform_device *pdev)
-{
-        dev = &pdev->dev;
-        return cpufreq_register_driver(&u8500_driver);
-}
-
-static int __exit u8500_cpufreq_remove(struct platform_device *pdev)
-{
-        return cpufreq_unregister_driver(&u8500_driver);
-}
-
-static struct platform_driver u8500_cpufreq_driver = {
-        .driver = {
-                .name    = DRIVER_NAME,
-                .owner   = THIS_MODULE,
-        },
-        .remove = __exit_p(u8500_cpufreq_remove),
-};
-
-static int __init u8500_cpufreq_init(void)
-{
-        return platform_driver_probe(&u8500_cpufreq_driver,
-                                     &u8500_cpufreq_probe);
-}
-
-device_initcall(u8500_cpufreq_init);