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Commit fe44193c authored by Michael Hennerich's avatar Michael Hennerich Committed by Bryan Wu
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[Blackfin] arch: Functional power management support: Remove broken cpu frequency scaling drivers 



Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent 8e39df21

arch/blackfin/mach-bf527/Makefile

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@@ -5,5 +5,3 @@ 
extra-y := head.o



obj-y := ints-priority.o dma.o
 


obj-$(CONFIG_CPU_FREQ)   += cpu.o

arch/blackfin/mach-bf527/cpu.c

deleted100644 → 0
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Original line number Diff line number Diff line 
/*

 * File:         arch/blackfin/mach-bf527/cpu.c

 * Based on:	arch/blackfin/mach-bf537/cpu.c

 * Author:       michael.kang@analog.com

 *

 * Created:

 * Description:  clock scaling for the bf527

 *

 * Modified:

 *               Copyright 2004-2007 Analog Devices Inc.

 *

 * Bugs:         Enter bugs at http://blackfin.uclinux.org/

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see the file COPYING, or write

 * to the Free Software Foundation, Inc.,

 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */



#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/init.h>

#include <linux/cpufreq.h>

#include <asm/dpmc.h>

#include <linux/fs.h>

#include <asm/bfin-global.h>



/* CONFIG_CLKIN_HZ=11059200 */

#define VCO5 (CONFIG_CLKIN_HZ*45)	/*497664000 */

#define VCO4 (CONFIG_CLKIN_HZ*36)	/*398131200 */

#define VCO3 (CONFIG_CLKIN_HZ*27)	/*298598400 */

#define VCO2 (CONFIG_CLKIN_HZ*18)	/*199065600 */

#define VCO1 (CONFIG_CLKIN_HZ*9)	/*99532800 */

#define VCO(x) VCO##x



#define MFREQ(x) {VCO(x), VCO(x)/4}, {VCO(x), VCO(x)/2}, {VCO(x), VCO(x)}

/* frequency */

static struct cpufreq_frequency_table bf527_freq_table[] = {

	MFREQ(1),

	MFREQ(3),

	{VCO4, VCO4 / 2}, {VCO4, VCO4},

	MFREQ(5),

	{0, CPUFREQ_TABLE_END},

};



/*

 * dpmc_fops->ioctl()

 * static int dpmc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)

 */

static int bf527_getfreq(unsigned int cpu)

{

	unsigned long cclk_mhz;



	/* The driver only support single cpu */

	if (cpu == 0)

		dpmc_fops.ioctl(NULL, NULL, IOCTL_GET_CORECLOCK, &cclk_mhz);

	else

		cclk_mhz = -1;



	return cclk_mhz;

}



static int bf527_target(struct cpufreq_policy *policy,

			unsigned int target_freq, unsigned int relation)

{

	unsigned long cclk_mhz;

	unsigned long vco_mhz;

	unsigned long flags;

	unsigned int index;

	struct cpufreq_freqs freqs;



	if (cpufreq_frequency_table_target

	    (policy, bf527_freq_table, target_freq, relation, &index))

		return -EINVAL;



	cclk_mhz = bf527_freq_table[index].frequency;

	vco_mhz = bf527_freq_table[index].index;



	dpmc_fops.ioctl(NULL, NULL, IOCTL_CHANGE_FREQUENCY, &vco_mhz);

	freqs.old = bf527_getfreq(0);

	freqs.new = cclk_mhz;

	freqs.cpu = 0;



	pr_debug

	    ("cclk begin change to cclk %d,vco=%d,index=%d,target=%d,oldfreq=%d\n",

	     cclk_mhz, vco_mhz, index, target_freq, freqs.old);



	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);

	local_irq_save(flags);

	dpmc_fops.ioctl(NULL, NULL, IOCTL_SET_CCLK, &cclk_mhz);

	local_irq_restore(flags);

	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);



	vco_mhz = get_vco();

	cclk_mhz = get_cclk();

	return 0;

}



/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on

 * this platform, anyway.

 */

static int bf527_verify_speed(struct cpufreq_policy *policy)

{

	return cpufreq_frequency_table_verify(policy, &bf527_freq_table);

}



static int __init __bf527_cpu_init(struct cpufreq_policy *policy)

{

	if (policy->cpu != 0)

		return -EINVAL;



	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;



	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

	/*Now ,only support one cpu */

	policy->cur = bf527_getfreq(0);

	cpufreq_frequency_table_get_attr(bf527_freq_table, policy->cpu);

	return cpufreq_frequency_table_cpuinfo(policy, bf527_freq_table);

}



static struct freq_attr *bf527_freq_attr[] = {

	&cpufreq_freq_attr_scaling_available_freqs,

	NULL,

};



static struct cpufreq_driver bf527_driver = {

	.verify = bf527_verify_speed,

	.target = bf527_target,

	.get = bf527_getfreq,

	.init = __bf527_cpu_init,

	.name = "bf527",

	.owner = THIS_MODULE,

	.attr = bf527_freq_attr,

};



static int __init bf527_cpu_init(void)

{

	return cpufreq_register_driver(&bf527_driver);

}



static void __exit bf527_cpu_exit(void)

{

	cpufreq_unregister_driver(&bf527_driver);

}



MODULE_AUTHOR("Mickael Kang");

MODULE_DESCRIPTION("cpufreq driver for bf527 CPU");

MODULE_LICENSE("GPL");



module_init(bf527_cpu_init);

module_exit(bf527_cpu_exit);

arch/blackfin/mach-bf533/Makefile

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Original line number Diff line number Diff line
@@ -5,5 +5,3 @@ 
extra-y := head.o



obj-y := ints-priority.o dma.o
 


obj-$(CONFIG_CPU_FREQ)   += cpu.o

arch/blackfin/mach-bf533/cpu.c

deleted100644 → 0
+0 −158
Original line number Diff line number Diff line 
/*

 * File:         arch/blackfin/mach-bf533/cpu.c

 * Based on:

 * Author:       michael.kang@analog.com

 *

 * Created:

 * Description:  clock scaling for the bf533

 *

 * Modified:

 *               Copyright 2004-2006 Analog Devices Inc.

 *

 * Bugs:         Enter bugs at http://blackfin.uclinux.org/

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see the file COPYING, or write

 * to the Free Software Foundation, Inc.,

 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */



#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/init.h>

#include <linux/cpufreq.h>

#include <asm/dpmc.h>

#include <linux/fs.h>

#include <asm/bfin-global.h>



/* CONFIG_CLKIN_HZ=11059200 */

#define VCO5 (CONFIG_CLKIN_HZ*45)	/*497664000 */

#define VCO4 (CONFIG_CLKIN_HZ*36)	/*398131200 */

#define VCO3 (CONFIG_CLKIN_HZ*27)	/*298598400 */

#define VCO2 (CONFIG_CLKIN_HZ*18)	/*199065600 */

#define VCO1 (CONFIG_CLKIN_HZ*9)	/*99532800 */

#define VCO(x) VCO##x



#define FREQ(x) {VCO(x),VCO(x)/4},{VCO(x),VCO(x)/2},{VCO(x),VCO(x)}

/* frequency */

static struct cpufreq_frequency_table bf533_freq_table[] = {

	FREQ(1),

	FREQ(3),

	{VCO4, VCO4 / 2}, {VCO4, VCO4},

	FREQ(5),

	{0, CPUFREQ_TABLE_END},

};



/*

 * dpmc_fops->ioctl()

 * static int dpmc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)

 */

static int bf533_getfreq(unsigned int cpu)

{

	unsigned long cclk_mhz, vco_mhz;



	/* The driver only support single cpu */

	if (cpu == 0)

		dpmc_fops.ioctl(NULL, NULL, IOCTL_GET_CORECLOCK, &cclk_mhz);

	else

		cclk_mhz = -1;

	return cclk_mhz;

}



static int bf533_target(struct cpufreq_policy *policy,

			    unsigned int target_freq, unsigned int relation)

{

	unsigned long cclk_mhz;

	unsigned long vco_mhz;

	unsigned long flags;

	unsigned int index, vco_index;

	int i;



	struct cpufreq_freqs freqs;

	if (cpufreq_frequency_table_target(policy, bf533_freq_table, target_freq, relation, &index))

		return -EINVAL;

	cclk_mhz = bf533_freq_table[index].frequency;

	vco_mhz = bf533_freq_table[index].index;



	dpmc_fops.ioctl(NULL, NULL, IOCTL_CHANGE_FREQUENCY, &vco_mhz);

	freqs.old = bf533_getfreq(0);

	freqs.new = cclk_mhz;

	freqs.cpu = 0;



	pr_debug("cclk begin change to cclk %d,vco=%d,index=%d,target=%d,oldfreq=%d\n",

	         cclk_mhz, vco_mhz, index, target_freq, freqs.old);



	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);

	local_irq_save(flags);

	dpmc_fops.ioctl(NULL, NULL, IOCTL_SET_CCLK, &cclk_mhz);

	local_irq_restore(flags);

	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);



	vco_mhz = get_vco();

	cclk_mhz = get_cclk();

	return 0;

}



/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on

 * this platform, anyway.

 */

static int bf533_verify_speed(struct cpufreq_policy *policy)

{

	return cpufreq_frequency_table_verify(policy, &bf533_freq_table);

}



static int __init __bf533_cpu_init(struct cpufreq_policy *policy)

{

	int result;



	if (policy->cpu != 0)

		return -EINVAL;



	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

	/*Now ,only support one cpu */

	policy->cur = bf533_getfreq(0);

	cpufreq_frequency_table_get_attr(bf533_freq_table, policy->cpu);

	return cpufreq_frequency_table_cpuinfo(policy, bf533_freq_table);

}



static struct freq_attr *bf533_freq_attr[] = {

	&cpufreq_freq_attr_scaling_available_freqs,

	NULL,

};



static struct cpufreq_driver bf533_driver = {

	.verify = bf533_verify_speed,

	.target = bf533_target,

	.get = bf533_getfreq,

	.init = __bf533_cpu_init,

	.name = "bf533",

	.owner = THIS_MODULE,

	.attr = bf533_freq_attr,

};



static int __init bf533_cpu_init(void)

{

	return cpufreq_register_driver(&bf533_driver);

}



static void __exit bf533_cpu_exit(void)

{

	cpufreq_unregister_driver(&bf533_driver);

}



MODULE_AUTHOR("Mickael Kang");

MODULE_DESCRIPTION("cpufreq driver for BF533 CPU");

MODULE_LICENSE("GPL");



module_init(bf533_cpu_init);

module_exit(bf533_cpu_exit);

arch/blackfin/mach-bf537/Makefile

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Original line number Diff line number Diff line
@@ -5,5 +5,3 @@ 
extra-y := head.o



obj-y := ints-priority.o dma.o
 


obj-$(CONFIG_CPU_FREQ)   += cpu.o