PCI: qcom: Use regulator bulk api for apq8064 supplies

This patch converts existing regulators to use regulator bulk apis,
to make it consistent with msm8996 changes also cut down some redundant code.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>

drivers/pci/dwc/pcie-qcom.c

@@ -79,6 +79,7 @@
 #define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE	0x358
 #define SLV_ADDR_SPACE_SZ			0x10000000
 
+#define QCOM_PCIE_2_1_0_MAX_SUPPLY	3
 struct qcom_pcie_resources_2_1_0 {
 	struct clk *iface_clk;
 	struct clk *core_clk;
@@ -88,9 +89,7 @@ struct qcom_pcie_resources_2_1_0 {
 	struct reset_control *ahb_reset;
 	struct reset_control *por_reset;
 	struct reset_control *phy_reset;
-	struct regulator *vdda;
-	struct regulator *vdda_phy;
-	struct regulator *vdda_refclk;
+	struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
 };
 
 struct qcom_pcie_resources_1_0_0 {
@@ -218,18 +217,15 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
 	struct dw_pcie *pci = pcie->pci;
 	struct device *dev = pci->dev;
+	int ret;
 
-	res->vdda = devm_regulator_get(dev, "vdda");
-	if (IS_ERR(res->vdda))
-		return PTR_ERR(res->vdda);
-
-	res->vdda_phy = devm_regulator_get(dev, "vdda_phy");
-	if (IS_ERR(res->vdda_phy))
-		return PTR_ERR(res->vdda_phy);
-
-	res->vdda_refclk = devm_regulator_get(dev, "vdda_refclk");
-	if (IS_ERR(res->vdda_refclk))
-		return PTR_ERR(res->vdda_refclk);
+	res->supplies[0].supply = "vdda";
+	res->supplies[1].supply = "vdda_phy";
+	res->supplies[2].supply = "vdda_refclk";
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
+				      res->supplies);
+	if (ret)
+		return ret;
 
 	res->iface_clk = devm_clk_get(dev, "iface");
 	if (IS_ERR(res->iface_clk))
@@ -275,9 +271,7 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
 	clk_disable_unprepare(res->iface_clk);
 	clk_disable_unprepare(res->core_clk);
 	clk_disable_unprepare(res->phy_clk);
-	regulator_disable(res->vdda);
-	regulator_disable(res->vdda_phy);
-	regulator_disable(res->vdda_refclk);
+	regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
 }
 
 static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
@@ -288,24 +282,12 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
 	u32 val;
 	int ret;
 
-	ret = regulator_enable(res->vdda);
-	if (ret) {
-		dev_err(dev, "cannot enable vdda regulator\n");
+	ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
+	if (ret < 0) {
+		dev_err(dev, "cannot enable regulators\n");
 		return ret;
 	}
 
-	ret = regulator_enable(res->vdda_refclk);
-	if (ret) {
-		dev_err(dev, "cannot enable vdda_refclk regulator\n");
-		goto err_refclk;
-	}
-
-	ret = regulator_enable(res->vdda_phy);
-	if (ret) {
-		dev_err(dev, "cannot enable vdda_phy regulator\n");
-		goto err_vdda_phy;
-	}
-
 	ret = reset_control_assert(res->ahb_reset);
 	if (ret) {
 		dev_err(dev, "cannot assert ahb reset\n");
@@ -389,11 +371,7 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
 err_clk_phy:
 	clk_disable_unprepare(res->iface_clk);
 err_assert_ahb:
-	regulator_disable(res->vdda_phy);
-err_vdda_phy:
-	regulator_disable(res->vdda_refclk);
-err_refclk:
-	regulator_disable(res->vdda);
+	regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
 
 	return ret;
 }