[PATCH v2 2/3] regulator: core: add helper to check if regulator is disabled in suspend

[<Claudiu.Beznea@microchip.com>]

From: Claudiu Beznea <claudiu.beznea@microchip.com>

Add helper to check if regulator will be disabled in suspend.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
 drivers/regulator/core.c           | 17 +++++++++++++++++
 include/linux/regulator/consumer.h |  7 +++++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b9d7b45c7295..3b761969732a 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3786,6 +3786,23 @@ int regulator_suspend_disable(struct regulator_dev *rdev,
 }
 EXPORT_SYMBOL_GPL(regulator_suspend_disable);
 
+bool regulator_is_disabled_in_suspend(struct regulator *regulator,
+				      suspend_state_t state)
+{
+	struct regulator_state *rstate;
+
+	if (!regulator->rdev->constraints)
+		return false;
+
+	rstate = regulator_get_suspend_state(regulator->rdev, state);
+	if (!rstate)
+		return false;
+
+	return regulator->rdev->desc->ops->set_suspend_disable &&
+	       rstate->enabled == DISABLE_IN_SUSPEND;
+}
+EXPORT_SYMBOL_GPL(regulator_is_disabled_in_suspend);
+
 static int _regulator_set_suspend_voltage(struct regulator *regulator,
 					  int min_uV, int max_uV,
 					  suspend_state_t state)
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index f3f76051e8b0..cf5e71dc63ce 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -36,6 +36,7 @@
 #define __LINUX_REGULATOR_CONSUMER_H_
 
 #include <linux/err.h>
+#include <linux/suspend.h>
 
 struct device;
 struct notifier_block;
@@ -285,6 +286,9 @@ void devm_regulator_unregister_notifier(struct regulator *regulator,
 void *regulator_get_drvdata(struct regulator *regulator);
 void regulator_set_drvdata(struct regulator *regulator, void *data);
 
+/* regulator suspend/resume state */
+bool regulator_is_disabled_in_suspend(struct regulator *regulator,
+				      suspend_state_t state);
 #else
 
 /*
@@ -579,6 +583,9 @@ static inline int regulator_list_voltage(struct regulator *regulator, unsigned s
 	return -EINVAL;
 }
 
+bool regulator_is_disabled_in_suspend(struct regulator *regulator,
+				      suspend_state_t state);
+
 #endif
 
 static inline int regulator_set_voltage_triplet(struct regulator *regulator,
-- 
2.7.4