cpufreq: Use cpufreq_for_each_* macros for frequency table iteration

The cpufreq core now supports the cpufreq_for_each_entry and
cpufreq_for_each_valid_entry macros helpers for iteration over the
cpufreq_frequency_table, so use them.

It should have no functional changes.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/acpi-cpufreq.c

@@ -213,7 +213,7 @@ static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
 
 static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
 {
-	int i;
+	struct cpufreq_frequency_table *pos;
 	struct acpi_processor_performance *perf;
 
 	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
@@ -223,10 +223,9 @@ static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
 
 	perf = data->acpi_data;
 
-	for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
-		if (msr == perf->states[data->freq_table[i].driver_data].status)
-			return data->freq_table[i].frequency;
-	}
+	cpufreq_for_each_entry(pos, data->freq_table)
+		if (msr == perf->states[pos->driver_data].status)
+			return pos->frequency;
 	return data->freq_table[0].frequency;
 }
 

drivers/cpufreq/arm_big_little.c

@@ -226,22 +226,22 @@ static inline u32 get_table_count(struct cpufreq_frequency_table *table)
 /* get the minimum frequency in the cpufreq_frequency_table */
 static inline u32 get_table_min(struct cpufreq_frequency_table *table)
 {
-	int i;
+	struct cpufreq_frequency_table *pos;
 	uint32_t min_freq = ~0;
-	for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++)
-		if (table[i].frequency < min_freq)
-			min_freq = table[i].frequency;
+	cpufreq_for_each_entry(pos, table)
+		if (pos->frequency < min_freq)
+			min_freq = pos->frequency;
 	return min_freq;
 }
 
 /* get the maximum frequency in the cpufreq_frequency_table */
 static inline u32 get_table_max(struct cpufreq_frequency_table *table)
 {
-	int i;
+	struct cpufreq_frequency_table *pos;
 	uint32_t max_freq = 0;
-	for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++)
-		if (table[i].frequency > max_freq)
-			max_freq = table[i].frequency;
+	cpufreq_for_each_entry(pos, table)
+		if (pos->frequency > max_freq)
+			max_freq = pos->frequency;
 	return max_freq;
 }
 

drivers/cpufreq/cpufreq_stats.c

@@ -182,11 +182,11 @@ static void cpufreq_stats_free_table(unsigned int cpu)
 
 static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
 {
-	unsigned int i, j, count = 0, ret = 0;
+	unsigned int i, count = 0, ret = 0;
 	struct cpufreq_stats *stat;
 	unsigned int alloc_size;
 	unsigned int cpu = policy->cpu;
-	struct cpufreq_frequency_table *table;
+	struct cpufreq_frequency_table *pos, *table;
 
 	table = cpufreq_frequency_get_table(cpu);
 	if (unlikely(!table))
@@ -205,12 +205,8 @@ static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
 	stat->cpu = cpu;
 	per_cpu(cpufreq_stats_table, cpu) = stat;
 
-	for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
-		unsigned int freq = table[i].frequency;
-		if (freq == CPUFREQ_ENTRY_INVALID)
-			continue;
+	cpufreq_for_each_valid_entry(pos, table)
 		count++;
-	}
 
 	alloc_size = count * sizeof(int) + count * sizeof(u64);
 
@@ -228,15 +224,11 @@ static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
 	stat->trans_table = stat->freq_table + count;
 #endif
-	j = 0;
-	for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
-		unsigned int freq = table[i].frequency;
-		if (freq == CPUFREQ_ENTRY_INVALID)
-			continue;
-		if (freq_table_get_index(stat, freq) == -1)
-			stat->freq_table[j++] = freq;
-	}
-	stat->state_num = j;
+	i = 0;
+	cpufreq_for_each_valid_entry(pos, table)
+		if (freq_table_get_index(stat, pos->frequency) == -1)
+			stat->freq_table[i++] = pos->frequency;
+	stat->state_num = i;
 	spin_lock(&cpufreq_stats_lock);
 	stat->last_time = get_jiffies_64();
 	stat->last_index = freq_table_get_index(stat, policy->cur);

drivers/cpufreq/dbx500-cpufreq.c

@@ -45,7 +45,7 @@ static struct cpufreq_driver dbx500_cpufreq_driver = {
 
 static int dbx500_cpufreq_probe(struct platform_device *pdev)
 {
-	int i = 0;
+	struct cpufreq_frequency_table *pos;
 
 	freq_table = dev_get_platdata(&pdev->dev);
 	if (!freq_table) {
@@ -60,10 +60,8 @@ static int dbx500_cpufreq_probe(struct platform_device *pdev)
 	}
 
 	pr_info("dbx500-cpufreq: Available frequencies:\n");
-	while (freq_table[i].frequency != CPUFREQ_TABLE_END) {
-		pr_info("  %d Mhz\n", freq_table[i].frequency/1000);
-		i++;
-	}
+	cpufreq_for_each_entry(pos, freq_table)
+		pr_info("  %d Mhz\n", pos->frequency / 1000);
 
 	return cpufreq_register_driver(&dbx500_cpufreq_driver);
 }

drivers/cpufreq/elanfreq.c

@@ -147,7 +147,7 @@ static int elanfreq_target(struct cpufreq_policy *policy,
 static int elanfreq_cpu_init(struct cpufreq_policy *policy)
 {
 	struct cpuinfo_x86 *c = &cpu_data(0);
-	unsigned int i;
+	struct cpufreq_frequency_table *pos;
 
 	/* capability check */
 	if ((c->x86_vendor != X86_VENDOR_AMD) ||
@@ -159,10 +159,9 @@ static int elanfreq_cpu_init(struct cpufreq_policy *policy)
 		max_freq = elanfreq_get_cpu_frequency(0);
 
 	/* table init */
-	for (i = 0; (elanfreq_table[i].frequency != CPUFREQ_TABLE_END); i++) {
-		if (elanfreq_table[i].frequency > max_freq)
-			elanfreq_table[i].frequency = CPUFREQ_ENTRY_INVALID;
-	}
+	cpufreq_for_each_entry(pos, elanfreq_table)
+		if (pos->frequency > max_freq)
+			pos->frequency = CPUFREQ_ENTRY_INVALID;
 
 	/* cpuinfo and default policy values */
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

drivers/cpufreq/exynos-cpufreq.c

@@ -29,17 +29,16 @@ static unsigned int locking_frequency;
 static int exynos_cpufreq_get_index(unsigned int freq)
 {
 	struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
-	int index;
+	struct cpufreq_frequency_table *pos;
 
-	for (index = 0;
-		freq_table[index].frequency != CPUFREQ_TABLE_END; index++)
-		if (freq_table[index].frequency == freq)
+	cpufreq_for_each_entry(pos, freq_table)
+		if (pos->frequency == freq)
 			break;
 
-	if (freq_table[index].frequency == CPUFREQ_TABLE_END)
+	if (pos->frequency == CPUFREQ_TABLE_END)
 		return -EINVAL;
 
-	return index;
+	return pos - freq_table;
 }
 
 static int exynos_cpufreq_scale(unsigned int target_freq)

drivers/cpufreq/exynos5440-cpufreq.c

@@ -114,25 +114,23 @@ static struct cpufreq_freqs freqs;
 
 static int init_div_table(void)
 {
-	struct cpufreq_frequency_table *freq_tbl = dvfs_info->freq_table;
+	struct cpufreq_frequency_table *pos, *freq_tbl = dvfs_info->freq_table;
 	unsigned int tmp, clk_div, ema_div, freq, volt_id;
-	int i = 0;
 	struct dev_pm_opp *opp;
 
 	rcu_read_lock();
-	for (i = 0; freq_tbl[i].frequency != CPUFREQ_TABLE_END; i++) {
-
+	cpufreq_for_each_entry(pos, freq_tbl) {
 		opp = dev_pm_opp_find_freq_exact(dvfs_info->dev,
-					freq_tbl[i].frequency * 1000, true);
+					pos->frequency * 1000, true);
 		if (IS_ERR(opp)) {
 			rcu_read_unlock();
 			dev_err(dvfs_info->dev,
 				"failed to find valid OPP for %u KHZ\n",
-				freq_tbl[i].frequency);
+				pos->frequency);
 			return PTR_ERR(opp);
 		}
 
-		freq = freq_tbl[i].frequency / 1000; /* In MHZ */
+		freq = pos->frequency / 1000; /* In MHZ */
 		clk_div = ((freq / CPU_DIV_FREQ_MAX) & P0_7_CPUCLKDEV_MASK)
 					<< P0_7_CPUCLKDEV_SHIFT;
 		clk_div |= ((freq / CPU_ATB_FREQ_MAX) & P0_7_ATBCLKDEV_MASK)
@@ -157,7 +155,8 @@ static int init_div_table(void)
 		tmp = (clk_div | ema_div | (volt_id << P0_7_VDD_SHIFT)
 			| ((freq / FREQ_UNIT) << P0_7_FREQ_SHIFT));
 
-		__raw_writel(tmp, dvfs_info->base + XMU_PMU_P0_7 + 4 * i);
+		__raw_writel(tmp, dvfs_info->base + XMU_PMU_P0_7 + 4 *
+						(pos - freq_tbl));
 	}
 
 	rcu_read_unlock();
@@ -166,8 +165,9 @@ static int init_div_table(void)
 
 static void exynos_enable_dvfs(unsigned int cur_frequency)
 {
-	unsigned int tmp, i, cpu;
+	unsigned int tmp, cpu;
 	struct cpufreq_frequency_table *freq_table = dvfs_info->freq_table;
+	struct cpufreq_frequency_table *pos;
 	/* Disable DVFS */
 	__raw_writel(0,	dvfs_info->base + XMU_DVFS_CTRL);
 
@@ -182,15 +182,15 @@ static void exynos_enable_dvfs(unsigned int cur_frequency)
 	 __raw_writel(tmp, dvfs_info->base + XMU_PMUIRQEN);
 
 	/* Set initial performance index */
-	for (i = 0; freq_table[i].frequency != CPUFREQ_TABLE_END; i++)
-		if (freq_table[i].frequency == cur_frequency)
+	cpufreq_for_each_entry(pos, freq_table)
+		if (pos->frequency == cur_frequency)
 			break;
 
-	if (freq_table[i].frequency == CPUFREQ_TABLE_END) {
+	if (pos->frequency == CPUFREQ_TABLE_END) {
 		dev_crit(dvfs_info->dev, "Boot up frequency not supported\n");
 		/* Assign the highest frequency */
-		i = 0;
-		cur_frequency = freq_table[i].frequency;
+		pos = freq_table;
+		cur_frequency = pos->frequency;
 	}
 
 	dev_info(dvfs_info->dev, "Setting dvfs initial frequency = %uKHZ",
@@ -199,7 +199,7 @@ static void exynos_enable_dvfs(unsigned int cur_frequency)
 	for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++) {
 		tmp = __raw_readl(dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4);
 		tmp &= ~(P_VALUE_MASK << C0_3_PSTATE_NEW_SHIFT);
-		tmp |= (i << C0_3_PSTATE_NEW_SHIFT);
+		tmp |= ((pos - freq_table) << C0_3_PSTATE_NEW_SHIFT);
 		__raw_writel(tmp, dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4);
 	}
 

drivers/cpufreq/freq_table.c

@@ -21,22 +21,19 @@
 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 i;
+	unsigned int freq;
 
-	for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
-		unsigned int freq = table[i].frequency;
-		if (freq == CPUFREQ_ENTRY_INVALID) {
-			pr_debug("table entry %u is invalid, skipping\n", i);
+	cpufreq_for_each_valid_entry(pos, table) {
+		freq = pos->frequency;
 
-			continue;
-		}
 		if (!cpufreq_boost_enabled()
-		    && (table[i].flags & CPUFREQ_BOOST_FREQ))
+		    && (pos->flags & CPUFREQ_BOOST_FREQ))
 			continue;
 
-		pr_debug("table entry %u: %u kHz\n", i, freq);
+		pr_debug("table entry %u: %u kHz\n", (int)(pos - table), freq);
 		if (freq < min_freq)
 			min_freq = freq;
 		if (freq > max_freq)
@@ -57,17 +54,18 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
 int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
 				   struct cpufreq_frequency_table *table)
 {
-	unsigned int next_larger = ~0, freq, i = 0;
+	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);
 
-	for (; freq = table[i].frequency, freq != CPUFREQ_TABLE_END; i++) {
-		if (freq == CPUFREQ_ENTRY_INVALID)
-			continue;
+	cpufreq_for_each_valid_entry(pos, table) {
+		freq = pos->frequency;
+
 		if ((freq >= policy->min) && (freq <= policy->max)) {
 			found = true;
 			break;
@@ -118,7 +116,8 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
 		.driver_data = ~0,
 		.frequency = 0,
 	};
-	unsigned int i;
+	struct cpufreq_frequency_table *pos;
+	unsigned int freq, i = 0;
 
 	pr_debug("request for target %u kHz (relation: %u) for cpu %u\n",
 					target_freq, relation, policy->cpu);
@@ -132,10 +131,10 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
 		break;
 	}
 
-	for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
-		unsigned int freq = table[i].frequency;
-		if (freq == CPUFREQ_ENTRY_INVALID)
-			continue;
+	cpufreq_for_each_valid_entry(pos, table) {
+		freq = pos->frequency;
+
+		i = pos - table;
 		if ((freq < policy->min) || (freq > policy->max))
 			continue;
 		switch (relation) {
@@ -184,19 +183,17 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
 int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
 		unsigned int freq)
 {
-	struct cpufreq_frequency_table *table;
-	int i;
+	struct cpufreq_frequency_table *pos, *table;
 
 	table = cpufreq_frequency_get_table(policy->cpu);
 	if (unlikely(!table)) {
 		pr_debug("%s: Unable to find frequency table\n", __func__);
 		return -ENOENT;
 	}
 
-	for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
-		if (table[i].frequency == freq)
-			return i;
-	}
+	cpufreq_for_each_valid_entry(pos, table)
+		if (pos->frequency == freq)
+			return pos - table;
 
 	return -EINVAL;
 }
@@ -208,16 +205,13 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
 static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
 				    bool show_boost)
 {
-	unsigned int i = 0;
 	ssize_t count = 0;
-	struct cpufreq_frequency_table *table = policy->freq_table;
+	struct cpufreq_frequency_table *pos, *table = policy->freq_table;
 
 	if (!table)
 		return -ENODEV;
 
-	for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
-		if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
-			continue;
+	cpufreq_for_each_valid_entry(pos, table) {
 		/*
 		 * show_boost = true and driver_data = BOOST freq
 		 * display BOOST freqs
@@ -229,10 +223,10 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
 		 * show_boost = false and driver_data != BOOST freq
 		 * display NON BOOST freqs
 		 */
-		if (show_boost ^ (table[i].flags & CPUFREQ_BOOST_FREQ))
+		if (show_boost ^ (pos->flags & CPUFREQ_BOOST_FREQ))
 			continue;
 
-		count += sprintf(&buf[count], "%d ", table[i].frequency);
+		count += sprintf(&buf[count], "%d ", pos->frequency);
 	}
 	count += sprintf(&buf[count], "\n");