regulator: qcom_usb_vbus: add support for qcom,pm4125-vbus-reg

Documentation/devicetree/bindings/regulator/qcom,usb-vbus-regulator.yaml

@@ -14,6 +14,13 @@ description: |
   regulator will be enabled in situations where the device is required to
   provide power to the connected peripheral.
 
+  The pm8150b variant uses an OTG current-limit selector, supporting limits
+  of 500 mA, 1000 mA, 1500 mA, 2000 mA, 2500 mA and 3000 mA.
+
+  The pm4125 variant uses a different register layout with a 2-bit VBOOST
+  voltage selector supporting output voltages of 4.25 V, 4.5 V, 4.75 V
+  and 5.0 V.
+
 allOf:
   - $ref: regulator.yaml#
 
@@ -22,9 +29,9 @@ properties:
     oneOf:
       - enum:
           - qcom,pm8150b-vbus-reg
+          - qcom,pm4125-vbus-reg
       - items:
           - enum:
-              - qcom,pm4125-vbus-reg
               - qcom,pm6150-vbus-reg
               - qcom,pm7250b-vbus-reg
               - qcom,pmi632-vbus-reg
@@ -34,11 +41,33 @@ properties:
     maxItems: 1
     description: VBUS output base address
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - qcom,pm8150b-vbus-reg
+          - qcom,pm6150-vbus-reg
+          - qcom,pm7250b-vbus-reg
+          - qcom,pmi632-vbus-reg
+then:
+  required:
+    - regulator-min-microamp
+    - regulator-max-microamp
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: qcom,pm4125-vbus-reg
+then:
+  required:
+    - regulator-min-microvolt
+    - regulator-max-microvolt
+
 required:
   - compatible
   - reg
-  - regulator-min-microamp
-  - regulator-max-microamp
 
 unevaluatedProperties: false
 
@@ -55,4 +84,16 @@ examples:
             regulator-max-microamp = <3000000>;
         };
      };
+  - |
+     pmic {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        usb-vbus-regulator@5000 {
+            compatible = "qcom,pm4125-vbus-reg";
+            reg = <0x1100>;
+            regulator-min-microvolt = <4250000>;
+            regulator-max-microvolt = <5000000>;
+        };
+     };
 ...

drivers/regulator/qcom_usb_vbus-regulator.c

@@ -20,10 +20,35 @@
 #define OTG_CFG				0x53
 #define OTG_EN_SRC_CFG			BIT(1)
 
+#define PM4125_CMD_OTG			0x50
+#define PM4125_VBOOST_CFG		0x52
+#define PM4125_VBOOST_CFG_MASK		GENMASK(1, 0)
+#define PM4125_OTG_CFG			0x56
+#define PM4125_OTG_EN_SRC_CFG          BIT(0)
+
+struct qcom_usb_vbus_reg_data {
+	u16 cmd_otg;
+	u16 otg_cfg;
+	u8  otg_en_src_cfg;
+	u16 csel_reg;
+	u8 csel_mask;
+	const unsigned int *curr_table;
+	unsigned int n_current_limits;
+	u16 vsel_reg;
+	u8 vsel_mask;
+	const unsigned int *volt_table;
+	unsigned int n_voltages;
+	const struct regulator_ops *ops;
+};
+
 static const unsigned int curr_table[] = {
 	500000, 1000000, 1500000, 2000000, 2500000, 3000000,
 };
 
+static const unsigned int pm4125_vboost_table[] = {
+	4250000, 4500000, 4750000, 5000000,
+};
+
 static const struct regulator_ops qcom_usb_vbus_reg_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
@@ -32,19 +57,43 @@ static const struct regulator_ops qcom_usb_vbus_reg_ops = {
 	.set_current_limit = regulator_set_current_limit_regmap,
 };
 
-static struct regulator_desc qcom_usb_vbus_rdesc = {
-	.name = "usb_vbus",
-	.ops = &qcom_usb_vbus_reg_ops,
-	.owner = THIS_MODULE,
-	.type = REGULATOR_VOLTAGE,
+static const struct regulator_ops qcom_usb_vbus_pm4125_reg_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.list_voltage = regulator_list_voltage_table,
+};
+
+static const struct qcom_usb_vbus_reg_data pm8150b_data = {
+	.cmd_otg = CMD_OTG,
+	.otg_cfg = OTG_CFG,
+	.otg_en_src_cfg = OTG_EN_SRC_CFG,
+	.csel_reg = OTG_CURRENT_LIMIT_CFG,
+	.csel_mask = OTG_CURRENT_LIMIT_MASK,
 	.curr_table = curr_table,
 	.n_current_limits = ARRAY_SIZE(curr_table),
+	.ops = &qcom_usb_vbus_reg_ops,
+};
+
+static const struct qcom_usb_vbus_reg_data pm4125_data = {
+	.cmd_otg = PM4125_CMD_OTG,
+	.otg_cfg = PM4125_OTG_CFG,
+	.otg_en_src_cfg = PM4125_OTG_EN_SRC_CFG,
+	.vsel_reg = PM4125_VBOOST_CFG,
+	.vsel_mask = PM4125_VBOOST_CFG_MASK,
+	.volt_table = pm4125_vboost_table,
+	.n_voltages = ARRAY_SIZE(pm4125_vboost_table),
+	.ops = &qcom_usb_vbus_pm4125_reg_ops,
 };
 
 static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	const struct qcom_usb_vbus_reg_data *data;
 	struct regulator_dev *rdev;
+	struct regulator_desc *rdesc;
 	struct regmap *regmap;
 	struct regulator_config config = { };
 	struct regulator_init_data *init_data;
@@ -57,41 +106,66 @@ static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	data = of_device_get_match_data(dev);
+	if (!data)
+		return -EINVAL;
+
 	regmap = dev_get_regmap(dev->parent, NULL);
 	if (!regmap) {
 		dev_err(dev, "Failed to get regmap\n");
 		return -ENOENT;
 	}
 
-	init_data = of_get_regulator_init_data(dev, dev->of_node,
-					       &qcom_usb_vbus_rdesc);
+	rdesc = devm_kzalloc(dev, sizeof(*rdesc), GFP_KERNEL);
+	if (!rdesc)
+		return -ENOMEM;
+
+	rdesc->name = "usb_vbus";
+	rdesc->ops = data->ops;
+	rdesc->owner = THIS_MODULE;
+	rdesc->type = REGULATOR_VOLTAGE;
+	rdesc->enable_reg = base + data->cmd_otg;
+	rdesc->enable_mask = OTG_EN;
+
+	if (data->curr_table) {
+		rdesc->curr_table = data->curr_table;
+		rdesc->n_current_limits = data->n_current_limits;
+		rdesc->csel_reg = base + data->csel_reg;
+		rdesc->csel_mask = data->csel_mask;
+	}
+
+	if (data->volt_table) {
+		rdesc->volt_table = data->volt_table;
+		rdesc->n_voltages = data->n_voltages;
+		rdesc->vsel_reg = base + data->vsel_reg;
+		rdesc->vsel_mask = data->vsel_mask;
+	}
+
+	init_data = of_get_regulator_init_data(dev, dev->of_node, rdesc);
 	if (!init_data)
 		return -ENOMEM;
 
-	qcom_usb_vbus_rdesc.enable_reg = base + CMD_OTG;
-	qcom_usb_vbus_rdesc.enable_mask = OTG_EN;
-	qcom_usb_vbus_rdesc.csel_reg = base + OTG_CURRENT_LIMIT_CFG;
-	qcom_usb_vbus_rdesc.csel_mask = OTG_CURRENT_LIMIT_MASK;
 	config.dev = dev;
 	config.init_data = init_data;
 	config.of_node = dev->of_node;
 	config.regmap = regmap;
 
-	rdev = devm_regulator_register(dev, &qcom_usb_vbus_rdesc, &config);
+	rdev = devm_regulator_register(dev, rdesc, &config);
 	if (IS_ERR(rdev)) {
 		ret = PTR_ERR(rdev);
 		dev_err(dev, "not able to register vbus reg %d\n", ret);
 		return ret;
 	}
 
 	/* Disable HW logic for VBUS enable */
-	regmap_update_bits(regmap, base + OTG_CFG, OTG_EN_SRC_CFG, 0);
+	regmap_update_bits(regmap, base + data->otg_cfg, data->otg_en_src_cfg, 0);
 
 	return 0;
 }
 
 static const struct of_device_id qcom_usb_vbus_regulator_match[] = {
-	{ .compatible = "qcom,pm8150b-vbus-reg" },
+	{ .compatible = "qcom,pm8150b-vbus-reg", .data = &pm8150b_data },
+	{ .compatible = "qcom,pm4125-vbus-reg", .data = &pm4125_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, qcom_usb_vbus_regulator_match);