Voltage tolerance isn't necessarily same on both sides of the target voltage and regulator_set_voltage_tol() wouldn't be suitable in such cases.

Add another routine regulator_set_voltage_triplet(), which accepts target, min and max voltages as arguments.

This first tries to set the voltage between the target voltage and the upper limit, then fall back on the full range. The idea behind this is to set regulator's voltage as close to the target voltage, as possible.

Based on regulator_set_voltage_tol().

Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- V2->V3: - Improve commit log, with how its useful at regulator API level. - Compare regulator_set_voltage() == 0, instead of !regulator_set_voltage().

V1->V2: - Change the order of arguments to regulator_set_voltage_triplet() to min/target/max instead of target/min/max.

include/linux/regulator/consumer.h | 10 ++++++++++ 1 file changed, 10 insertions(+)

diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h index f8a689ed62a5..e325d4606b62 100644 --- a/include/linux/regulator/consumer.h +++ b/include/linux/regulator/consumer.h @@ -552,6 +552,16 @@ static inline int regulator_count_voltages(struct regulator *regulator) } #endif

+static inline int regulator_set_voltage_triplet(struct regulator *regulator, + int min_uV, int target_uV, + int max_uV) +{ + if (regulator_set_voltage(regulator, target_uV, max_uV) == 0) + return 0; + + return regulator_set_voltage(regulator, min_uV, max_uV); +} + static inline int regulator_set_voltage_tol(struct regulator *regulator, int new_uV, int tol_uV) {