regulator: If a single voltage is set with device tree then set apply_uV

Otherwise there is no way in the bindings to configure a fixed voltage
via software. It seems reasonable to assume that if the binding explicitly
specifies a voltage we want to actually use that voltage.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index acd7045d16017328f2e6107320d6566b80584b80..b7b3fc3b09e2f4c1caeec214725a14d590786080 100644 (file)
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -34,6 +34,9 @@ static void of_get_regulation_constraints(struct device_node *np,
        /* Voltage change possible? */
        if (constraints->min_uV != constraints->max_uV)
                constraints->valid_ops_mask |= REGULATOR_CHANGE_VOLTAGE;
+       /* Only one voltage?  Then make sure it's set. */
+       if (constraints->min_uV == constraints->max_uV)
+               constraints->apply_uV = true;
 
        uV_offset = of_get_property(np, "regulator-microvolt-offset", NULL);
        if (uV_offset)