regulator: of: Use regulator-init-microvolt as early minimum

Change-Id: If491089520b3228484357e08482ae0e955b1226a
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>

Author: finley1226

Documentation/devicetree/bindings/regulator/regulator.txt

@@ -5,8 +5,9 @@ Optional properties:
 - regulator-min-microvolt: smallest voltage consumers may set
 - regulator-max-microvolt: largest voltage consumers may set
 - regulator-microvolt-offset: Offset applied to voltages to compensate for voltage drops
-- regulator-early-min-microvolt: minimum voltage during system startup, make sure we
-  select a voltage that suits the needs of all regulator consumers
+- regulator-init-microvolt: Set by bootloader or when initialising, in order to
+  make sure the voltage can suit the needs of all regulator consumers during
+  system startup.
 - regulator-min-microamp: smallest current consumers may set
 - regulator-max-microamp: largest current consumers may set
 - regulator-input-current-limit-microamp: maximum input current regulator allows

drivers/regulator/of_regulator.c

@@ -42,7 +42,7 @@ static void of_get_regulation_constraints(struct device_node *np,
 	if (!of_property_read_u32(np, "regulator-max-microvolt", &pval))
 		constraints->max_uV = pval;
 
-	if (!of_property_read_u32(np, "regulator-early-min-microvolt", &pval))
+	if (!of_property_read_u32(np, "regulator-init-microvolt", &pval))
 		constraints->early_min_uV = pval;
 
 	/* Voltage change possible? */