phy: qcom-qmp-usb: use bulk reset_control API

Switch qcom-qmp-usb driver to use reset_control_bulk_assert / _deassert
functions rather than hardcoding the loops in the driver itself.
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org> # UFS, PCIe and USB on SC8180X
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220607213203.2819885-31-dmitry.baryshkov@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/qualcomm/phy-qcom-qmp-usb.c

@@ -1446,7 +1446,7 @@ struct qcom_qmp {
 	void __iomem *dp_com;
 
 	struct clk_bulk_data *clks;
-	struct reset_control **resets;
+	struct reset_control_bulk_data *resets;
 	struct regulator_bulk_data *vregs;
 
 	struct qmp_phy **phys;
@@ -2009,7 +2009,7 @@ static int qcom_qmp_phy_usb_com_init(struct qmp_phy *qphy)
 	const struct qmp_phy_cfg *cfg = qphy->cfg;
 	void __iomem *pcs = qphy->pcs;
 	void __iomem *dp_com = qmp->dp_com;
-	int ret, i;
+	int ret;
 
 	/* turn on regulator supplies */
 	ret = regulator_bulk_enable(cfg->num_vregs, qmp->vregs);
@@ -2018,22 +2018,16 @@ static int qcom_qmp_phy_usb_com_init(struct qmp_phy *qphy)
 		return ret;
 	}
 
-	for (i = 0; i < cfg->num_resets; i++) {
-		ret = reset_control_assert(qmp->resets[i]);
+	ret = reset_control_bulk_assert(cfg->num_resets, qmp->resets);
 	if (ret) {
-			dev_err(qmp->dev, "%s reset assert failed\n",
-				cfg->reset_list[i]);
+		dev_err(qmp->dev, "reset assert failed\n");
 		goto err_disable_regulators;
 	}
-	}
 
-	for (i = cfg->num_resets - 1; i >= 0; i--) {
-		ret = reset_control_deassert(qmp->resets[i]);
+	ret = reset_control_bulk_deassert(cfg->num_resets, qmp->resets);
 	if (ret) {
-			dev_err(qmp->dev, "%s reset deassert failed\n",
-				qphy->cfg->reset_list[i]);
-			goto err_assert_reset;
-		}
+		dev_err(qmp->dev, "reset deassert failed\n");
+		goto err_disable_regulators;
 	}
 
 	ret = clk_bulk_prepare_enable(cfg->num_clks, qmp->clks);
@@ -2074,8 +2068,7 @@ static int qcom_qmp_phy_usb_com_init(struct qmp_phy *qphy)
 	return 0;
 
 err_assert_reset:
-	while (++i < cfg->num_resets)
-		reset_control_assert(qmp->resets[i]);
+	reset_control_bulk_assert(cfg->num_resets, qmp->resets);
 err_disable_regulators:
 	regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
 
@@ -2086,10 +2079,8 @@ static int qcom_qmp_phy_usb_com_exit(struct qmp_phy *qphy)
 {
 	struct qcom_qmp *qmp = qphy->qmp;
 	const struct qmp_phy_cfg *cfg = qphy->cfg;
-	int i = cfg->num_resets;
 
-	while (--i >= 0)
-		reset_control_assert(qmp->resets[i]);
+	reset_control_bulk_assert(cfg->num_resets, qmp->resets);
 
 	clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);
 
@@ -2376,23 +2367,19 @@ static int qcom_qmp_phy_usb_reset_init(struct device *dev, const struct qmp_phy_
 {
 	struct qcom_qmp *qmp = dev_get_drvdata(dev);
 	int i;
+	int ret;
 
 	qmp->resets = devm_kcalloc(dev, cfg->num_resets,
 				   sizeof(*qmp->resets), GFP_KERNEL);
 	if (!qmp->resets)
 		return -ENOMEM;
 
-	for (i = 0; i < cfg->num_resets; i++) {
-		struct reset_control *rst;
-		const char *name = cfg->reset_list[i];
+	for (i = 0; i < cfg->num_resets; i++)
+		qmp->resets[i].id = cfg->reset_list[i];
 
-		rst = devm_reset_control_get_exclusive(dev, name);
-		if (IS_ERR(rst)) {
-			dev_err(dev, "failed to get %s reset\n", name);
-			return PTR_ERR(rst);
-		}
-		qmp->resets[i] = rst;
-	}
+	ret = devm_reset_control_bulk_get_exclusive(dev, cfg->num_resets, qmp->resets);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to get resets\n");
 
 	return 0;
 }