regulator: core: Add regulator_is_supported_voltage_tol()

If consumers wish to set voltages based on a tolerance it stands to reason
that they will also want to query for support in the same manner.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index c43cd35..49415a2 100644 (file)
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -367,4 +367,12 @@ static inline int regulator_set_voltage_tol(struct regulator *regulator,
                                     new_uV - tol_uV, new_uV + tol_uV);
 }
 
+static inline int regulator_is_supported_voltage_tol(struct regulator *regulator,
+                                                    int target_uV, int tol_uV)
+{
+       return regulator_is_supported_voltage(regulator,
+                                             target_uV - tol_uV,
+                                             target_uV + tol_uV);
+}
+
 #endif