[PATCH v4 1/6] cpufreq: make scaling_boost_freqs sysfs attr available when boost is enabled

[Bartlomiej Zolnierkiewicz]

Add cpufreq_boost_enabled_generic_attr table and use it in
cpufreq-dt driver instead of cpufreq_generic_attr one when
boost support is enabled.  As a result scaling_boost_freqs
sysfs attribute is available when cpufreq-dt driver is
used and boost support is enabled.

Cc: Viresh Kumar <viresh.kumar at linaro.org>
Cc: Thomas Abraham <thomas.ab at samsung.com>
Cc: Javier Martinez Canillas <javier at osg.samsung.com>
Cc: Krzysztof Kozlowski <k.kozlowski at samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie at samsung.com>
---
 drivers/cpufreq/cpufreq-dt.c | 3 +++
 drivers/cpufreq/freq_table.c | 7 +++++++
 include/linux/cpufreq.h      | 1 +
 3 files changed, 11 insertions(+)

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index b9259ab..7b091c0 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -182,6 +182,8 @@ try_again:
 	return ret;
 }
 
+static struct cpufreq_driver dt_cpufreq_driver;
+
 static int cpufreq_init(struct cpufreq_policy *policy)
 {
 	struct cpufreq_frequency_table *freq_table;
@@ -336,6 +338,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
 		ret = cpufreq_enable_boost_support();
 		if (ret)
 			goto out_free_cpufreq_table;
+		dt_cpufreq_driver.attr = cpufreq_boost_enabled_generic_attr;
 	}
 
 	policy->cpuinfo.transition_latency = transition_latency;
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index a8f1daf..5a00a09 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -300,6 +300,13 @@ struct freq_attr *cpufreq_generic_attr[] = {
 };
 EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
 
+struct freq_attr *cpufreq_boost_enabled_generic_attr[] = {
+	&cpufreq_freq_attr_scaling_available_freqs,
+	&cpufreq_freq_attr_scaling_boost_freqs,
+	NULL,
+};
+EXPORT_SYMBOL_GPL(cpufreq_boost_enabled_generic_attr);
+
 int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
 				      struct cpufreq_frequency_table *table)
 {
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 95f0186..25937ff 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -610,6 +610,7 @@ struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
 /* the following are really really optional */
 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
 extern struct freq_attr *cpufreq_generic_attr[];
+extern struct freq_attr *cpufreq_boost_enabled_generic_attr[];
 int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
 				      struct cpufreq_frequency_table *table);
 
-- 
1.9.1