--- zzzz-none-000/linux-3.10.107/drivers/regulator/vexpress.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/regulator/vexpress.c	2021-02-04 17:41:59.000000000 +0000
@@ -26,14 +26,14 @@
 struct vexpress_regulator {
 	struct regulator_desc desc;
 	struct regulator_dev *regdev;
-	struct vexpress_config_func *func;
+	struct regmap *regmap;
 };
 
 static int vexpress_regulator_get_voltage(struct regulator_dev *regdev)
 {
 	struct vexpress_regulator *reg = rdev_get_drvdata(regdev);
 	u32 uV;
-	int err = vexpress_config_read(reg->func, 0, &uV);
+	int err = regmap_read(reg->regmap, 0, &uV);
 
 	return err ? err : uV;
 }
@@ -43,7 +43,7 @@
 {
 	struct vexpress_regulator *reg = rdev_get_drvdata(regdev);
 
-	return vexpress_config_write(reg->func, 0, min_uV);
+	return regmap_write(reg->regmap, 0, min_uV);
 }
 
 static struct regulator_ops vexpress_regulator_ops_ro = {
@@ -57,33 +57,27 @@
 
 static int vexpress_regulator_probe(struct platform_device *pdev)
 {
-	int err;
 	struct vexpress_regulator *reg;
 	struct regulator_init_data *init_data;
 	struct regulator_config config = { };
 
 	reg = devm_kzalloc(&pdev->dev, sizeof(*reg), GFP_KERNEL);
-	if (!reg) {
-		err = -ENOMEM;
-		goto error_kzalloc;
-	}
-
-	reg->func = vexpress_config_func_get_by_dev(&pdev->dev);
-	if (!reg->func) {
-		err = -ENXIO;
-		goto error_get_func;
-	}
+	if (!reg)
+		return -ENOMEM;
+
+	reg->regmap = devm_regmap_init_vexpress_config(&pdev->dev);
+	if (IS_ERR(reg->regmap))
+		return PTR_ERR(reg->regmap);
 
 	reg->desc.name = dev_name(&pdev->dev);
 	reg->desc.type = REGULATOR_VOLTAGE;
 	reg->desc.owner = THIS_MODULE;
 	reg->desc.continuous_voltage_range = true;
 
-	init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node);
-	if (!init_data) {
-		err = -EINVAL;
-		goto error_get_regulator_init_data;
-	}
+	init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
+					       &reg->desc);
+	if (!init_data)
+		return -EINVAL;
 
 	init_data->constraints.apply_uV = 0;
 	if (init_data->constraints.min_uV && init_data->constraints.max_uV)
@@ -96,45 +90,25 @@
 	config.driver_data = reg;
 	config.of_node = pdev->dev.of_node;
 
-	reg->regdev = regulator_register(&reg->desc, &config);
-	if (IS_ERR(reg->regdev)) {
-		err = PTR_ERR(reg->regdev);
-		goto error_regulator_register;
-	}
+	reg->regdev = devm_regulator_register(&pdev->dev, &reg->desc, &config);
+	if (IS_ERR(reg->regdev))
+		return PTR_ERR(reg->regdev);
 
 	platform_set_drvdata(pdev, reg);
 
 	return 0;
-
-error_regulator_register:
-error_get_regulator_init_data:
-	vexpress_config_func_put(reg->func);
-error_get_func:
-error_kzalloc:
-	return err;
-}
-
-static int vexpress_regulator_remove(struct platform_device *pdev)
-{
-	struct vexpress_regulator *reg = platform_get_drvdata(pdev);
-
-	vexpress_config_func_put(reg->func);
-	regulator_unregister(reg->regdev);
-
-	return 0;
 }
 
-static struct of_device_id vexpress_regulator_of_match[] = {
+static const struct of_device_id vexpress_regulator_of_match[] = {
 	{ .compatible = "arm,vexpress-volt", },
 	{ }
 };
+MODULE_DEVICE_TABLE(of, vexpress_regulator_of_match);
 
 static struct platform_driver vexpress_regulator_driver = {
 	.probe = vexpress_regulator_probe,
-	.remove = vexpress_regulator_remove,
 	.driver	= {
 		.name = DRVNAME,
-		.owner = THIS_MODULE,
 		.of_match_table = vexpress_regulator_of_match,
 	},
 };