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authorViresh Kumar <viresh.kumar@linaro.org>2013-04-04 12:54:11 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-08 13:02:31 +0200
commit8a7b1227e303d7e927214ee0f260041aef44bb58 (patch)
tree25a0d462813885e1f745ba118940abe7f75a30de /arch/arm/mach-davinci
parentceff98e3338cc53e31491aa8db395dd66327b210 (diff)
cpufreq: davinci: move cpufreq driver to drivers/cpufreq
This patch moves cpufreq driver of ARM based davinci platform to drivers/cpufreq. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Sekhar Nori <nsekhar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/arm/mach-davinci')
-rw-r--r--arch/arm/mach-davinci/Makefile1
-rw-r--r--arch/arm/mach-davinci/cpufreq.c233
2 files changed, 0 insertions, 234 deletions
diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile
index fb5c1aa98a63..dd1ffccc75e9 100644
--- a/arch/arm/mach-davinci/Makefile
+++ b/arch/arm/mach-davinci/Makefile
@@ -37,7 +37,6 @@ obj-$(CONFIG_MACH_MITYOMAPL138) += board-mityomapl138.o
obj-$(CONFIG_MACH_OMAPL138_HAWKBOARD) += board-omapl138-hawk.o
# Power Management
-obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_SUSPEND) += pm.o sleep.o
obj-$(CONFIG_HAVE_CLK) += pm_domain.o
diff --git a/arch/arm/mach-davinci/cpufreq.c b/arch/arm/mach-davinci/cpufreq.c
deleted file mode 100644
index 7c2e943c5500..000000000000
--- a/arch/arm/mach-davinci/cpufreq.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * CPU frequency scaling for DaVinci
- *
- * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
- *
- * Based on linux/arch/arm/plat-omap/cpu-omap.c. Original Copyright follows:
- *
- * Copyright (C) 2005 Nokia Corporation
- * Written by Tony Lindgren <tony@atomide.com>
- *
- * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King
- *
- * Copyright (C) 2007-2008 Texas Instruments, Inc.
- * Updated to support OMAP3
- * Rajendra Nayak <rnayak@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/types.h>
-#include <linux/cpufreq.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/export.h>
-
-#include <mach/hardware.h>
-#include <mach/cpufreq.h>
-#include <mach/common.h>
-
-#include "clock.h"
-
-struct davinci_cpufreq {
- struct device *dev;
- struct clk *armclk;
- struct clk *asyncclk;
- unsigned long asyncrate;
-};
-static struct davinci_cpufreq cpufreq;
-
-static int davinci_verify_speed(struct cpufreq_policy *policy)
-{
- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
- struct cpufreq_frequency_table *freq_table = pdata->freq_table;
- struct clk *armclk = cpufreq.armclk;
-
- if (freq_table)
- return cpufreq_frequency_table_verify(policy, freq_table);
-
- if (policy->cpu)
- return -EINVAL;
-
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- policy->min = clk_round_rate(armclk, policy->min * 1000) / 1000;
- policy->max = clk_round_rate(armclk, policy->max * 1000) / 1000;
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
- return 0;
-}
-
-static unsigned int davinci_getspeed(unsigned int cpu)
-{
- if (cpu)
- return 0;
-
- return clk_get_rate(cpufreq.armclk) / 1000;
-}
-
-static int davinci_target(struct cpufreq_policy *policy,
- unsigned int target_freq, unsigned int relation)
-{
- int ret = 0;
- unsigned int idx;
- struct cpufreq_freqs freqs;
- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
- struct clk *armclk = cpufreq.armclk;
-
- freqs.old = davinci_getspeed(0);
- freqs.new = clk_round_rate(armclk, target_freq * 1000) / 1000;
-
- if (freqs.old == freqs.new)
- return ret;
-
- dev_dbg(cpufreq.dev, "transition: %u --> %u\n", freqs.old, freqs.new);
-
- ret = cpufreq_frequency_table_target(policy, pdata->freq_table,
- freqs.new, relation, &idx);
- if (ret)
- return -EINVAL;
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- /* if moving to higher frequency, up the voltage beforehand */
- if (pdata->set_voltage && freqs.new > freqs.old) {
- ret = pdata->set_voltage(idx);
- if (ret)
- goto out;
- }
-
- ret = clk_set_rate(armclk, idx);
- if (ret)
- goto out;
-
- if (cpufreq.asyncclk) {
- ret = clk_set_rate(cpufreq.asyncclk, cpufreq.asyncrate);
- if (ret)
- goto out;
- }
-
- /* if moving to lower freq, lower the voltage after lowering freq */
- if (pdata->set_voltage && freqs.new < freqs.old)
- pdata->set_voltage(idx);
-
-out:
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- return ret;
-}
-
-static int davinci_cpu_init(struct cpufreq_policy *policy)
-{
- int result = 0;
- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
- struct cpufreq_frequency_table *freq_table = pdata->freq_table;
-
- if (policy->cpu != 0)
- return -EINVAL;
-
- /* Finish platform specific initialization */
- if (pdata->init) {
- result = pdata->init();
- if (result)
- return result;
- }
-
- policy->cur = davinci_getspeed(0);
-
- result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
- if (result) {
- pr_err("%s: cpufreq_frequency_table_cpuinfo() failed",
- __func__);
- return result;
- }
-
- cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
-
- /*
- * Time measurement across the target() function yields ~1500-1800us
- * time taken with no drivers on notification list.
- * Setting the latency to 2000 us to accommodate addition of drivers
- * to pre/post change notification list.
- */
- policy->cpuinfo.transition_latency = 2000 * 1000;
- return 0;
-}
-
-static int davinci_cpu_exit(struct cpufreq_policy *policy)
-{
- cpufreq_frequency_table_put_attr(policy->cpu);
- return 0;
-}
-
-static struct freq_attr *davinci_cpufreq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-static struct cpufreq_driver davinci_driver = {
- .flags = CPUFREQ_STICKY,
- .verify = davinci_verify_speed,
- .target = davinci_target,
- .get = davinci_getspeed,
- .init = davinci_cpu_init,
- .exit = davinci_cpu_exit,
- .name = "davinci",
- .attr = davinci_cpufreq_attr,
-};
-
-static int __init davinci_cpufreq_probe(struct platform_device *pdev)
-{
- struct davinci_cpufreq_config *pdata = pdev->dev.platform_data;
- struct clk *asyncclk;
-
- if (!pdata)
- return -EINVAL;
- if (!pdata->freq_table)
- return -EINVAL;
-
- cpufreq.dev = &pdev->dev;
-
- cpufreq.armclk = clk_get(NULL, "arm");
- if (IS_ERR(cpufreq.armclk)) {
- dev_err(cpufreq.dev, "Unable to get ARM clock\n");
- return PTR_ERR(cpufreq.armclk);
- }
-
- asyncclk = clk_get(cpufreq.dev, "async");
- if (!IS_ERR(asyncclk)) {
- cpufreq.asyncclk = asyncclk;
- cpufreq.asyncrate = clk_get_rate(asyncclk);
- }
-
- return cpufreq_register_driver(&davinci_driver);
-}
-
-static int __exit davinci_cpufreq_remove(struct platform_device *pdev)
-{
- clk_put(cpufreq.armclk);
-
- if (cpufreq.asyncclk)
- clk_put(cpufreq.asyncclk);
-
- return cpufreq_unregister_driver(&davinci_driver);
-}
-
-static struct platform_driver davinci_cpufreq_driver = {
- .driver = {
- .name = "cpufreq-davinci",
- .owner = THIS_MODULE,
- },
- .remove = __exit_p(davinci_cpufreq_remove),
-};
-
-int __init davinci_cpufreq_init(void)
-{
- return platform_driver_probe(&davinci_cpufreq_driver,
- davinci_cpufreq_probe);
-}
-