cpufreq: tegra: Move driver to drivers/cpufreq

This patch moves cpufreq driver of ARM based tegra platform to drivers/cpufreq.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2 files changed, 0 insertions, 295 deletions

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index f6b46ae2b7f8..09b578f9eb84 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -24,7 +24,6 @@ obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= cpuidle-tegra30.o
 endif
 obj-$(CONFIG_SMP)                       += platsmp.o headsmp.o
 obj-$(CONFIG_HOTPLUG_CPU)               += hotplug.o
-obj-$(CONFIG_CPU_FREQ)                  += cpu-tegra.o
 obj-$(CONFIG_TEGRA_PCI)                 += pcie.o
 
 obj-$(CONFIG_ARCH_TEGRA_2x_SOC)         += board-dt-tegra20.o
diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c
deleted file mode 100644
index 11ca730970f8..000000000000
--- a/arch/arm/mach-tegra/cpu-tegra.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * arch/arm/mach-tegra/cpu-tegra.c
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * Author:
- *      Colin Cross <ccross@google.com>
- *      Based on arch/arm/plat-omap/cpu-omap.c, (C) 2005 Nokia Corporation
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/cpufreq.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/suspend.h>
-
-/* Frequency table index must be sequential starting at 0 */
-static struct cpufreq_frequency_table freq_table[] = {
-        { 0, 216000 },
-        { 1, 312000 },
-        { 2, 456000 },
-        { 3, 608000 },
-        { 4, 760000 },
-        { 5, 816000 },
-        { 6, 912000 },
-        { 7, 1000000 },
-        { 8, CPUFREQ_TABLE_END },
-};
-
-#define NUM_CPUS        2
-
-static struct clk *cpu_clk;
-static struct clk *pll_x_clk;
-static struct clk *pll_p_clk;
-static struct clk *emc_clk;
-
-static unsigned long target_cpu_speed[NUM_CPUS];
-static DEFINE_MUTEX(tegra_cpu_lock);
-static bool is_suspended;
-
-static int tegra_verify_speed(struct cpufreq_policy *policy)
-{
-        return cpufreq_frequency_table_verify(policy, freq_table);
-}
-
-static unsigned int tegra_getspeed(unsigned int cpu)
-{
-        unsigned long rate;
-
-        if (cpu >= NUM_CPUS)
-                return 0;
-
-        rate = clk_get_rate(cpu_clk) / 1000;
-        return rate;
-}
-
-static int tegra_cpu_clk_set_rate(unsigned long rate)
-{
-        int ret;
-
-        /*
-         * Take an extra reference to the main pll so it doesn't turn
-         * off when we move the cpu off of it
-         */
-        clk_prepare_enable(pll_x_clk);
-
-        ret = clk_set_parent(cpu_clk, pll_p_clk);
-        if (ret) {
-                pr_err("Failed to switch cpu to clock pll_p\n");
-                goto out;
-        }
-
-        if (rate == clk_get_rate(pll_p_clk))
-                goto out;
-
-        ret = clk_set_rate(pll_x_clk, rate);
-        if (ret) {
-                pr_err("Failed to change pll_x to %lu\n", rate);
-                goto out;
-        }
-
-        ret = clk_set_parent(cpu_clk, pll_x_clk);
-        if (ret) {
-                pr_err("Failed to switch cpu to clock pll_x\n");
-                goto out;
-        }
-
-out:
-        clk_disable_unprepare(pll_x_clk);
-        return ret;
-}
-
-static int tegra_update_cpu_speed(struct cpufreq_policy *policy,
-                unsigned long rate)
-{
-        int ret = 0;
-        struct cpufreq_freqs freqs;
-
-        freqs.old = tegra_getspeed(0);
-        freqs.new = rate;
-
-        if (freqs.old == freqs.new)
-                return ret;
-
-        /*
-         * Vote on memory bus frequency based on cpu frequency
-         * This sets the minimum frequency, display or avp may request higher
-         */
-        if (rate >= 816000)
-                clk_set_rate(emc_clk, 600000000); /* cpu 816 MHz, emc max */
-        else if (rate >= 456000)
-                clk_set_rate(emc_clk, 300000000); /* cpu 456 MHz, emc 150Mhz */
-        else
-                clk_set_rate(emc_clk, 100000000);  /* emc 50Mhz */
-
-        cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
-#ifdef CONFIG_CPU_FREQ_DEBUG
-        printk(KERN_DEBUG "cpufreq-tegra: transition: %u --> %u\n",
-               freqs.old, freqs.new);
-#endif
-
-        ret = tegra_cpu_clk_set_rate(freqs.new * 1000);
-        if (ret) {
-                pr_err("cpu-tegra: Failed to set cpu frequency to %d kHz\n",
-                        freqs.new);
-                return ret;
-        }
-
-        cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
-        return 0;
-}
-
-static unsigned long tegra_cpu_highest_speed(void)
-{
-        unsigned long rate = 0;
-        int i;
-
-        for_each_online_cpu(i)
-                rate = max(rate, target_cpu_speed[i]);
-        return rate;
-}
-
-static int tegra_target(struct cpufreq_policy *policy,
-                       unsigned int target_freq,
-                       unsigned int relation)
-{
-        unsigned int idx;
-        unsigned int freq;
-        int ret = 0;
-
-        mutex_lock(&tegra_cpu_lock);
-
-        if (is_suspended) {
-                ret = -EBUSY;
-                goto out;
-        }
-
-        cpufreq_frequency_table_target(policy, freq_table, target_freq,
-                relation, &idx);
-
-        freq = freq_table[idx].frequency;
-
-        target_cpu_speed[policy->cpu] = freq;
-
-        ret = tegra_update_cpu_speed(policy, tegra_cpu_highest_speed());
-
-out:
-        mutex_unlock(&tegra_cpu_lock);
-        return ret;
-}
-
-static int tegra_pm_notify(struct notifier_block *nb, unsigned long event,
-        void *dummy)
-{
-        mutex_lock(&tegra_cpu_lock);
-        if (event == PM_SUSPEND_PREPARE) {
-                struct cpufreq_policy *policy = cpufreq_cpu_get(0);
-                is_suspended = true;
-                pr_info("Tegra cpufreq suspend: setting frequency to %d kHz\n",
-                        freq_table[0].frequency);
-                tegra_update_cpu_speed(policy, freq_table[0].frequency);
-                cpufreq_cpu_put(policy);
-        } else if (event == PM_POST_SUSPEND) {
-                is_suspended = false;
-        }
-        mutex_unlock(&tegra_cpu_lock);
-
-        return NOTIFY_OK;
-}
-
-static struct notifier_block tegra_cpu_pm_notifier = {
-        .notifier_call = tegra_pm_notify,
-};
-
-static int tegra_cpu_init(struct cpufreq_policy *policy)
-{
-        if (policy->cpu >= NUM_CPUS)
-                return -EINVAL;
-
-        clk_prepare_enable(emc_clk);
-        clk_prepare_enable(cpu_clk);
-
-        cpufreq_frequency_table_cpuinfo(policy, freq_table);
-        cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
-        policy->cur = tegra_getspeed(policy->cpu);
-        target_cpu_speed[policy->cpu] = policy->cur;
-
-        /* FIXME: what's the actual transition time? */
-        policy->cpuinfo.transition_latency = 300 * 1000;
-
-        cpumask_copy(policy->cpus, cpu_possible_mask);
-
-        if (policy->cpu == 0)
-                register_pm_notifier(&tegra_cpu_pm_notifier);
-
-        return 0;
-}
-
-static int tegra_cpu_exit(struct cpufreq_policy *policy)
-{
-        cpufreq_frequency_table_cpuinfo(policy, freq_table);
-        clk_disable_unprepare(emc_clk);
-        return 0;
-}
-
-static struct freq_attr *tegra_cpufreq_attr[] = {
-        &cpufreq_freq_attr_scaling_available_freqs,
-        NULL,
-};
-
-static struct cpufreq_driver tegra_cpufreq_driver = {
-        .verify         = tegra_verify_speed,
-        .target         = tegra_target,
-        .get            = tegra_getspeed,
-        .init           = tegra_cpu_init,
-        .exit           = tegra_cpu_exit,
-        .name           = "tegra",
-        .attr           = tegra_cpufreq_attr,
-};
-
-static int __init tegra_cpufreq_init(void)
-{
-        cpu_clk = clk_get_sys(NULL, "cpu");
-        if (IS_ERR(cpu_clk))
-                return PTR_ERR(cpu_clk);
-
-        pll_x_clk = clk_get_sys(NULL, "pll_x");
-        if (IS_ERR(pll_x_clk))
-                return PTR_ERR(pll_x_clk);
-
-        pll_p_clk = clk_get_sys(NULL, "pll_p_cclk");
-        if (IS_ERR(pll_p_clk))
-                return PTR_ERR(pll_p_clk);
-
-        emc_clk = clk_get_sys("cpu", "emc");
-        if (IS_ERR(emc_clk)) {
-                clk_put(cpu_clk);
-                return PTR_ERR(emc_clk);
-        }
-
-        return cpufreq_register_driver(&tegra_cpufreq_driver);
-}
-
-static void __exit tegra_cpufreq_exit(void)
-{
-        cpufreq_unregister_driver(&tegra_cpufreq_driver);
-        clk_put(emc_clk);
-        clk_put(cpu_clk);
-}
-
-
-MODULE_AUTHOR("Colin Cross <ccross@android.com>");
-MODULE_DESCRIPTION("cpufreq driver for Nvidia Tegra2");
-MODULE_LICENSE("GPL");
-module_init(tegra_cpufreq_init);
-module_exit(tegra_cpufreq_exit);