power: regulator: Introduce regulator_set_value_force function

In case we want to force a particular value on a regulator
irrespective of the min/max constraints for testing purposes
one can call regulator_set_value_force function.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cmd/regulator.c

@@ -292,7 +292,10 @@ static int do_value(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		return CMD_RET_FAILURE;
 	}
 
-	ret = regulator_set_value(dev, value);
+	if (!force)
+		ret = regulator_set_value(dev, value);
+	else
+		ret = regulator_set_value_force(dev, value);
 	if (ret) {
 		printf("Regulator: %s - can't set the Voltage!\n",
 		       uc_pdata->name);

drivers/power/regulator/regulator-uclass.c

@@ -48,6 +48,20 @@ int regulator_set_value(struct udevice *dev, int uV)
 	return ops->set_value(dev, uV);
 }
 
+/*
+ * To be called with at most caution as there is no check
+ * before setting the actual voltage value.
+ */
+int regulator_set_value_force(struct udevice *dev, int uV)
+{
+	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops || !ops->set_value)
+		return -ENOSYS;
+
+	return ops->set_value(dev, uV);
+}
+
 int regulator_get_current(struct udevice *dev)
 {
 	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

include/power/regulator.h

@@ -261,6 +261,16 @@ int regulator_get_value(struct udevice *dev);
 int regulator_set_value(struct udevice *dev, int uV);
 
 /**
+ * regulator_set_value_force: set the microvoltage value of a given regulator
+ *			      without any min-,max condition check
+ *
+ * @dev    - pointer to the regulator device
+ * @uV     - the output value to set [micro Volts]
+ * @return - 0 on success or -errno val if fails
+ */
+int regulator_set_value_force(struct udevice *dev, int uV);
+
+/**
  * regulator_get_current: get microampere value of a given regulator
  *
  * @dev    - pointer to the regulator device