[linux-2.6-block.git] / drivers / cpufreq / freq_table.c

/*
 * linux/drivers/cpufreq/freq_table.c
 *
 * Copyright (C) 2002 - 2003 Dominik Brodowski
 *
 * 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.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/cpufreq.h>
#include <linux/module.h>

/*********************************************************************
 *                     FREQUENCY TABLE HELPERS                       *
 *********************************************************************/

bool policy_has_boost_freq(struct cpufreq_policy *policy)
{
	struct cpufreq_frequency_table *pos, *table = policy->freq_table;

	if (!table)
		return false;

	cpufreq_for_each_valid_entry(pos, table)
		if (pos->flags & CPUFREQ_BOOST_FREQ)
			return true;

	return false;
}
EXPORT_SYMBOL_GPL(policy_has_boost_freq);

int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
				    struct cpufreq_frequency_table *table)
{
	struct cpufreq_frequency_table *pos;
	unsigned int min_freq = ~0;
	unsigned int max_freq = 0;
	unsigned int freq;

	cpufreq_for_each_valid_entry(pos, table) {
		freq = pos->frequency;

		if (!cpufreq_boost_enabled()
		    && (pos->flags & CPUFREQ_BOOST_FREQ))
			continue;

		pr_debug("table entry %u: %u kHz\n", (int)(pos - table), freq);
		if (freq < min_freq)
			min_freq = freq;
		if (freq > max_freq)
			max_freq = freq;
	}

	policy->min = policy->cpuinfo.min_freq = min_freq;
	policy->max = policy->cpuinfo.max_freq = max_freq;

	if (policy->min == ~0)
		return -EINVAL;
	else
		return 0;
}

int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
				   struct cpufreq_frequency_table *table)
{
	struct cpufreq_frequency_table *pos;
	unsigned int freq, next_larger = ~0;
	bool found = false;

	pr_debug("request for verification of policy (%u - %u kHz) for cpu %u\n",
					policy->min, policy->max, policy->cpu);

	cpufreq_verify_within_cpu_limits(policy);

	cpufreq_for_each_valid_entry(pos, table) {
		freq = pos->frequency;

		if ((freq >= policy->min) && (freq <= policy->max)) {
			found = true;
			break;
		}

		if ((next_larger > freq) && (freq > policy->max))
			next_larger = freq;
	}

	if (!found) {
		policy->max = next_larger;
		cpufreq_verify_within_cpu_limits(policy);
	}

	pr_debug("verification lead to (%u - %u kHz) for cpu %u\n",
				policy->min, policy->max, policy->cpu);

	return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);

/*
 * Generic routine to verify policy & frequency table, requires driver to set
 * policy->freq_table prior to it.
 */
int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy)
{
	if (!policy->freq_table)
		return -ENODEV;

	return cpufreq_frequency_table_verify(policy, policy->freq_table);
}
EXPORT_SYMBOL_GPL(cpufreq_generic_frequency_table_verify);

int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
				 unsigned int target_freq,
				 unsigned int relation)
{
	struct cpufreq_frequency_table optimal = {
		.driver_data = ~0,
		.frequency = 0,
	};
	struct cpufreq_frequency_table suboptimal = {
		.driver_data = ~0,
		.frequency = 0,
	};
	struct cpufreq_frequency_table *pos;
	struct cpufreq_frequency_table *table = policy->freq_table;
	unsigned int freq, diff, i = 0;
	int index;

	pr_debug("request for target %u kHz (relation: %u) for cpu %u\n",
					target_freq, relation, policy->cpu);

	switch (relation) {
	case CPUFREQ_RELATION_H:
		suboptimal.frequency = ~0;
		break;
	case CPUFREQ_RELATION_L:
	case CPUFREQ_RELATION_C:
		optimal.frequency = ~0;
		break;
	}

	cpufreq_for_each_valid_entry_idx(pos, table, i) {
		freq = pos->frequency;

		if ((freq < policy->min) || (freq > policy->max))
			continue;
		if (freq == target_freq) {
			optimal.driver_data = i;
			break;
		}
		switch (relation) {
		case CPUFREQ_RELATION_H:
			if (freq < target_freq) {
				if (freq >= optimal.frequency) {
					optimal.frequency = freq;
					optimal.driver_data = i;
				}
			} else {
				if (freq <= suboptimal.frequency) {
					suboptimal.frequency = freq;
					suboptimal.driver_data = i;
				}
			}
			break;
		case CPUFREQ_RELATION_L:
			if (freq > target_freq) {
				if (freq <= optimal.frequency) {
					optimal.frequency = freq;
					optimal.driver_data = i;
				}
			} else {
				if (freq >= suboptimal.frequency) {
					suboptimal.frequency = freq;
					suboptimal.driver_data = i;
				}
			}
			break;
		case CPUFREQ_RELATION_C:
			diff = abs(freq - target_freq);
			if (diff < optimal.frequency ||
			    (diff == optimal.frequency &&
			     freq > table[optimal.driver_data].frequency)) {
				optimal.frequency = diff;
				optimal.driver_data = i;
			}
			break;
		}
	}
	if (optimal.driver_data > i) {
		if (suboptimal.driver_data > i) {
			WARN(1, "Invalid frequency table: %d\n", policy->cpu);
			return 0;
		}

		index = suboptimal.driver_data;
	} else
		index = optimal.driver_data;

	pr_debug("target index is %u, freq is:%u kHz\n", index,
		 table[index].frequency);
	return index;
}
EXPORT_SYMBOL_GPL(cpufreq_table_index_unsorted);

int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
		unsigned int freq)
{
	struct cpufreq_frequency_table *pos, *table = policy->freq_table;
	int idx;

	if (unlikely(!table)) {
		pr_debug("%s: Unable to find frequency table\n", __func__);
		return -ENOENT;
	}

	cpufreq_for_each_valid_entry_idx(pos, table, idx)
		if (pos->frequency == freq)
			return idx;

	return -EINVAL;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);

/**
 * show_available_freqs - show available frequencies for the specified CPU
 */
static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
				    bool show_boost)
{
	ssize_t count = 0;
	struct cpufreq_frequency_table *pos, *table = policy->freq_table;

	if (!table)
		return -ENODEV;

	cpufreq_for_each_valid_entry(pos, table) {
		/*
		 * show_boost = true and driver_data = BOOST freq
		 * display BOOST freqs
		 *
		 * show_boost = false and driver_data = BOOST freq
		 * show_boost = true and driver_data != BOOST freq
		 * continue - do not display anything
		 *
		 * show_boost = false and driver_data != BOOST freq
		 * display NON BOOST freqs
		 */
		if (show_boost ^ (pos->flags & CPUFREQ_BOOST_FREQ))
			continue;

		count += sprintf(&buf[count], "%d ", pos->frequency);
	}
	count += sprintf(&buf[count], "\n");

	return count;

}

#define cpufreq_attr_available_freq(_name)	  \
struct freq_attr cpufreq_freq_attr_##_name##_freqs =     \
__ATTR_RO(_name##_frequencies)

/**
 * show_scaling_available_frequencies - show available normal frequencies for
 * the specified CPU
 */
static ssize_t scaling_available_frequencies_show(struct cpufreq_policy *policy,
						  char *buf)
{
	return show_available_freqs(policy, buf, false);
}
cpufreq_attr_available_freq(scaling_available);
EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);

/**
 * show_available_boost_freqs - show available boost frequencies for
 * the specified CPU
 */
static ssize_t scaling_boost_frequencies_show(struct cpufreq_policy *policy,
					      char *buf)
{
	return show_available_freqs(policy, buf, true);
}
cpufreq_attr_available_freq(scaling_boost);
EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_boost_freqs);

struct freq_attr *cpufreq_generic_attr[] = {
	&cpufreq_freq_attr_scaling_available_freqs,
#ifdef CONFIG_CPU_FREQ_BOOST_SW
	&cpufreq_freq_attr_scaling_boost_freqs,
#endif
	NULL,
};
EXPORT_SYMBOL_GPL(cpufreq_generic_attr);

static int set_freq_table_sorted(struct cpufreq_policy *policy)
{
	struct cpufreq_frequency_table *pos, *table = policy->freq_table;
	struct cpufreq_frequency_table *prev = NULL;
	int ascending = 0;

	policy->freq_table_sorted = CPUFREQ_TABLE_UNSORTED;

	cpufreq_for_each_valid_entry(pos, table) {
		if (!prev) {
			prev = pos;
			continue;
		}

		if (pos->frequency == prev->frequency) {
			pr_warn("Duplicate freq-table entries: %u\n",
				pos->frequency);
			return -EINVAL;
		}

		/* Frequency increased from prev to pos */
		if (pos->frequency > prev->frequency) {
			/* But frequency was decreasing earlier */
			if (ascending < 0) {
				pr_debug("Freq table is unsorted\n");
				return 0;
			}

			ascending++;
		} else {
			/* Frequency decreased from prev to pos */

			/* But frequency was increasing earlier */
			if (ascending > 0) {
				pr_debug("Freq table is unsorted\n");
				return 0;
			}

			ascending--;
		}

		prev = pos;
	}

	if (ascending > 0)
		policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_ASCENDING;
	else
		policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_DESCENDING;

	pr_debug("Freq table is sorted in %s order\n",
		 ascending > 0 ? "ascending" : "descending");

	return 0;
}

int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy)
{
	int ret;

	if (!policy->freq_table)
		return 0;

	ret = cpufreq_frequency_table_cpuinfo(policy, policy->freq_table);
	if (ret)
		return ret;

	return set_freq_table_sorted(policy);
}

MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("CPUfreq frequency table helpers");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/cpufreq/freq_table.c
	3	*
	4	* Copyright (C) 2002 - 2003 Dominik Brodowski
4f743694 DB	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
1da177e4 LT	10	*/
1da177e4 LT	11
db701151 VK	12	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
db701151 VK	13
1da177e4	14	#include <linux/cpufreq.h>
5ff0a268	15	#include <linux/module.h>
1da177e4	16
1da177e4 LT	17	/*********************************************************************
	18	* FREQUENCY TABLE HELPERS *
	19	*********************************************************************/
	20
44139ed4 VK	21	bool policy_has_boost_freq(struct cpufreq_policy *policy)
	22	{
	23	struct cpufreq_frequency_table pos, table = policy->freq_table;
	24
	25	if (!table)
	26	return false;
	27
	28	cpufreq_for_each_valid_entry(pos, table)
	29	if (pos->flags & CPUFREQ_BOOST_FREQ)
	30	return true;
	31
	32	return false;
	33	}
	34	EXPORT_SYMBOL_GPL(policy_has_boost_freq);
	35
1da177e4 LT	36	int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
	37	struct cpufreq_frequency_table *table)
	38	{
041526f9	39	struct cpufreq_frequency_table *pos;
1da177e4 LT	40	unsigned int min_freq = ~0;
1da177e4 LT	41	unsigned int max_freq = 0;
041526f9	42	unsigned int freq;
1da177e4	43
041526f9 SK	44	cpufreq_for_each_valid_entry(pos, table) {
041526f9 SK	45	freq = pos->frequency;
1da177e4	46
6f19efc0	47	if (!cpufreq_boost_enabled()
041526f9	48	&& (pos->flags & CPUFREQ_BOOST_FREQ))
6f19efc0 LM	49	continue;
6f19efc0 LM	50
041526f9	51	pr_debug("table entry %u: %u kHz\n", (int)(pos - table), freq);
1da177e4 LT	52	if (freq < min_freq)
	53	min_freq = freq;
	54	if (freq > max_freq)
	55	max_freq = freq;
	56	}
	57
	58	policy->min = policy->cpuinfo.min_freq = min_freq;
	59	policy->max = policy->cpuinfo.max_freq = max_freq;
	60
	61	if (policy->min == ~0)
	62	return -EINVAL;
	63	else
	64	return 0;
	65	}
1da177e4 LT	66
	67	int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
	68	struct cpufreq_frequency_table *table)
	69	{
041526f9 SK	70	struct cpufreq_frequency_table *pos;
041526f9 SK	71	unsigned int freq, next_larger = ~0;
77db50c4	72	bool found = false;
1da177e4	73
2d06d8c4	74	pr_debug("request for verification of policy (%u - %u kHz) for cpu %u\n",
e08f5f5b	75	policy->min, policy->max, policy->cpu);
1da177e4	76
be49e346	77	cpufreq_verify_within_cpu_limits(policy);
1da177e4	78
041526f9 SK	79	cpufreq_for_each_valid_entry(pos, table) {
	80	freq = pos->frequency;
	81
77db50c4 VK	82	if ((freq >= policy->min) && (freq <= policy->max)) {
	83	found = true;
	84	break;
	85	}
	86
	87	if ((next_larger > freq) && (freq > policy->max))
1da177e4 LT	88	next_larger = freq;
	89	}
	90
77db50c4	91	if (!found) {
1da177e4	92	policy->max = next_larger;
be49e346	93	cpufreq_verify_within_cpu_limits(policy);
77db50c4	94	}
1da177e4	95
2d06d8c4	96	pr_debug("verification lead to (%u - %u kHz) for cpu %u\n",
e08f5f5b	97	policy->min, policy->max, policy->cpu);
1da177e4 LT	98
	99	return 0;
	100	}
	101	EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
	102
18434512	103	/*
e0b3165b VK	104	* Generic routine to verify policy & frequency table, requires driver to set
e0b3165b VK	105	* policy->freq_table prior to it.
18434512 VK	106	*/
	107	int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy)
	108	{
f8bfc116	109	if (!policy->freq_table)
18434512 VK	110	return -ENODEV;
18434512 VK	111
f8bfc116	112	return cpufreq_frequency_table_verify(policy, policy->freq_table);
18434512 VK	113	}
18434512 VK	114	EXPORT_SYMBOL_GPL(cpufreq_generic_frequency_table_verify);
1da177e4	115
da0c6dc0 VK	116	int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
	117	unsigned int target_freq,
	118	unsigned int relation)
1da177e4	119	{
484944a5	120	struct cpufreq_frequency_table optimal = {
50701588	121	.driver_data = ~0,
484944a5 DJ	122	.frequency = 0,
	123	};
	124	struct cpufreq_frequency_table suboptimal = {
50701588	125	.driver_data = ~0,
484944a5 DJ	126	.frequency = 0,
484944a5 DJ	127	};
041526f9	128	struct cpufreq_frequency_table *pos;
7ab4aabb	129	struct cpufreq_frequency_table *table = policy->freq_table;
5b0c0b16	130	unsigned int freq, diff, i = 0;
d218ed77	131	int index;
1da177e4	132
2d06d8c4	133	pr_debug("request for target %u kHz (relation: %u) for cpu %u\n",
e08f5f5b	134	target_freq, relation, policy->cpu);
1da177e4 LT	135
	136	switch (relation) {
	137	case CPUFREQ_RELATION_H:
1da177e4 LT	138	suboptimal.frequency = ~0;
	139	break;
	140	case CPUFREQ_RELATION_L:
5b0c0b16	141	case CPUFREQ_RELATION_C:
1da177e4	142	optimal.frequency = ~0;
1da177e4 LT	143	break;
	144	}
	145
ffd81dcf	146	cpufreq_for_each_valid_entry_idx(pos, table, i) {
041526f9 SK	147	freq = pos->frequency;
041526f9 SK	148
1da177e4 LT	149	if ((freq < policy->min) \|\| (freq > policy->max))
1da177e4 LT	150	continue;
1e498856 SK	151	if (freq == target_freq) {
	152	optimal.driver_data = i;
	153	break;
	154	}
97acec55	155	switch (relation) {
1da177e4	156	case CPUFREQ_RELATION_H:
1e498856	157	if (freq < target_freq) {
1da177e4 LT	158	if (freq >= optimal.frequency) {
1da177e4 LT	159	optimal.frequency = freq;
50701588	160	optimal.driver_data = i;
1da177e4 LT	161	}
	162	} else {
	163	if (freq <= suboptimal.frequency) {
	164	suboptimal.frequency = freq;
50701588	165	suboptimal.driver_data = i;
1da177e4 LT	166	}
	167	}
	168	break;
	169	case CPUFREQ_RELATION_L:
1e498856	170	if (freq > target_freq) {
1da177e4 LT	171	if (freq <= optimal.frequency) {
1da177e4 LT	172	optimal.frequency = freq;
50701588	173	optimal.driver_data = i;
1da177e4 LT	174	}
	175	} else {
	176	if (freq >= suboptimal.frequency) {
	177	suboptimal.frequency = freq;
50701588	178	suboptimal.driver_data = i;
1da177e4 LT	179	}
	180	}
	181	break;
5b0c0b16 SK	182	case CPUFREQ_RELATION_C:
	183	diff = abs(freq - target_freq);
	184	if (diff < optimal.frequency \|\|
	185	(diff == optimal.frequency &&
	186	freq > table[optimal.driver_data].frequency)) {
	187	optimal.frequency = diff;
	188	optimal.driver_data = i;
	189	}
	190	break;
1da177e4 LT	191	}
1da177e4 LT	192	}
50701588	193	if (optimal.driver_data > i) {
d218ed77 VK	194	if (suboptimal.driver_data > i) {
	195	WARN(1, "Invalid frequency table: %d\n", policy->cpu);
	196	return 0;
	197	}
1da177e4	198
d218ed77 VK	199	index = suboptimal.driver_data;
	200	} else
	201	index = optimal.driver_data;
1da177e4	202
d218ed77 VK	203	pr_debug("target index is %u, freq is:%u kHz\n", index,
	204	table[index].frequency);
	205	return index;
1da177e4	206	}
da0c6dc0	207	EXPORT_SYMBOL_GPL(cpufreq_table_index_unsorted);
1da177e4	208
d3916691 VK	209	int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
	210	unsigned int freq)
	211	{
f8bfc116	212	struct cpufreq_frequency_table pos, table = policy->freq_table;
ffd81dcf	213	int idx;
d3916691	214
d3916691 VK	215	if (unlikely(!table)) {
	216	pr_debug("%s: Unable to find frequency table\n", __func__);
	217	return -ENOENT;
	218	}
	219
ffd81dcf	220	cpufreq_for_each_valid_entry_idx(pos, table, idx)
041526f9	221	if (pos->frequency == freq)
ffd81dcf	222	return idx;
d3916691 VK	223
	224	return -EINVAL;
	225	}
	226	EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
	227
1da177e4	228	/**
e32d22f7	229	* show_available_freqs - show available frequencies for the specified CPU
1da177e4	230	*/
6f19efc0 LM	231	static ssize_t show_available_freqs(struct cpufreq_policy policy, char buf,
6f19efc0 LM	232	bool show_boost)
1da177e4	233	{
1da177e4	234	ssize_t count = 0;
041526f9	235	struct cpufreq_frequency_table pos, table = policy->freq_table;
1da177e4	236
e0b3165b	237	if (!table)
1da177e4 LT	238	return -ENODEV;
1da177e4 LT	239
041526f9	240	cpufreq_for_each_valid_entry(pos, table) {
6f19efc0 LM	241	/*
	242	* show_boost = true and driver_data = BOOST freq
	243	* display BOOST freqs
	244	*
	245	* show_boost = false and driver_data = BOOST freq
	246	* show_boost = true and driver_data != BOOST freq
	247	* continue - do not display anything
	248	*
	249	* show_boost = false and driver_data != BOOST freq
	250	* display NON BOOST freqs
	251	*/
041526f9	252	if (show_boost ^ (pos->flags & CPUFREQ_BOOST_FREQ))
6f19efc0 LM	253	continue;
6f19efc0 LM	254
041526f9	255	count += sprintf(&buf[count], "%d ", pos->frequency);
1da177e4 LT	256	}
	257	count += sprintf(&buf[count], "\n");
	258
	259	return count;
	260
	261	}
	262
6f19efc0 LM	263	#define cpufreq_attr_available_freq(_name) \
	264	struct freq_attr cpufreq_freq_attr_##_name##_freqs = \
	265	__ATTR_RO(_name##_frequencies)
	266
	267	/**
	268	* show_scaling_available_frequencies - show available normal frequencies for
	269	* the specified CPU
	270	*/
	271	static ssize_t scaling_available_frequencies_show(struct cpufreq_policy *policy,
	272	char *buf)
	273	{
	274	return show_available_freqs(policy, buf, false);
	275	}
	276	cpufreq_attr_available_freq(scaling_available);
1da177e4 LT	277	EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);
1da177e4 LT	278
6f19efc0 LM	279	/**
	280	* show_available_boost_freqs - show available boost frequencies for
	281	* the specified CPU
	282	*/
	283	static ssize_t scaling_boost_frequencies_show(struct cpufreq_policy *policy,
	284	char *buf)
	285	{
	286	return show_available_freqs(policy, buf, true);
	287	}
	288	cpufreq_attr_available_freq(scaling_boost);
	289	EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_boost_freqs);
	290
18434512 VK	291	struct freq_attr *cpufreq_generic_attr[] = {
18434512 VK	292	&cpufreq_freq_attr_scaling_available_freqs,
6f19efc0 LM	293	#ifdef CONFIG_CPU_FREQ_BOOST_SW
	294	&cpufreq_freq_attr_scaling_boost_freqs,
	295	#endif
18434512 VK	296	NULL,
	297	};
	298	EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
	299
da0c6dc0 VK	300	static int set_freq_table_sorted(struct cpufreq_policy *policy)
	301	{
	302	struct cpufreq_frequency_table pos, table = policy->freq_table;
	303	struct cpufreq_frequency_table *prev = NULL;
	304	int ascending = 0;
	305
	306	policy->freq_table_sorted = CPUFREQ_TABLE_UNSORTED;
	307
	308	cpufreq_for_each_valid_entry(pos, table) {
	309	if (!prev) {
	310	prev = pos;
	311	continue;
	312	}
	313
	314	if (pos->frequency == prev->frequency) {
	315	pr_warn("Duplicate freq-table entries: %u\n",
	316	pos->frequency);
	317	return -EINVAL;
	318	}
	319
	320	/* Frequency increased from prev to pos */
	321	if (pos->frequency > prev->frequency) {
	322	/* But frequency was decreasing earlier */
	323	if (ascending < 0) {
	324	pr_debug("Freq table is unsorted\n");
	325	return 0;
	326	}
	327
	328	ascending++;
	329	} else {
	330	/* Frequency decreased from prev to pos */
	331
	332	/* But frequency was increasing earlier */
	333	if (ascending > 0) {
	334	pr_debug("Freq table is unsorted\n");
	335	return 0;
	336	}
	337
	338	ascending--;
	339	}
	340
	341	prev = pos;
	342	}
	343
	344	if (ascending > 0)
	345	policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_ASCENDING;
	346	else
	347	policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_DESCENDING;
	348
	349	pr_debug("Freq table is sorted in %s order\n",
	350	ascending > 0 ? "ascending" : "descending");
	351
	352	return 0;
	353	}
	354
d417e069 VK	355	int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy)
	356	{
	357	int ret;
	358
	359	if (!policy->freq_table)
	360	return 0;
	361
	362	ret = cpufreq_frequency_table_cpuinfo(policy, policy->freq_table);
	363	if (ret)
	364	return ret;
	365
	366	return set_freq_table_sorted(policy);
	367	}
	368
97acec55 DJ	369	MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
	370	MODULE_DESCRIPTION("CPUfreq frequency table helpers");
	371	MODULE_LICENSE("GPL");