linux-kernel - [PATCH v4 08/18] PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 2.3.2

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Message-Id: <20230315064255.15591-9-manivannan.sadhasivam@linaro.org>
Date:   Wed, 15 Mar 2023 12:12:45 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     andersson@...nel.org, lpieralisi@...nel.org, kw@...ux.com,
        krzysztof.kozlowski+dt@...aro.org, robh@...nel.org
Cc:     konrad.dybcio@...aro.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_srichara@...cinc.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v4 08/18] PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 2.3.2

All the clocks are enabled and disabled at the same time. So the bulk clock
APIs can be used to handle them together. This simplifies the code a lot.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 72 ++++++--------------------
 1 file changed, 15 insertions(+), 57 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 0bb27d3c95a0..939973733a1e 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -162,12 +162,10 @@ struct qcom_pcie_resources_2_1_0 {
 	struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
 };
 
-#define QCOM_PCIE_2_3_2_MAX_SUPPLY	2
+#define QCOM_PCIE_2_3_2_MAX_CLOCKS		4
+#define QCOM_PCIE_2_3_2_MAX_SUPPLY		2
 struct qcom_pcie_resources_2_3_2 {
-	struct clk *aux_clk;
-	struct clk *master_clk;
-	struct clk *slave_clk;
-	struct clk *cfg_clk;
+	struct clk_bulk_data clks[QCOM_PCIE_2_3_2_MAX_CLOCKS];
 	struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
 };
 
@@ -539,21 +537,14 @@ static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
 	if (ret)
 		return ret;
 
-	res->aux_clk = devm_clk_get(dev, "aux");
-	if (IS_ERR(res->aux_clk))
-		return PTR_ERR(res->aux_clk);
-
-	res->cfg_clk = devm_clk_get(dev, "cfg");
-	if (IS_ERR(res->cfg_clk))
-		return PTR_ERR(res->cfg_clk);
-
-	res->master_clk = devm_clk_get(dev, "bus_master");
-	if (IS_ERR(res->master_clk))
-		return PTR_ERR(res->master_clk);
+	res->clks[0].id = "aux";
+	res->clks[1].id = "cfg";
+	res->clks[2].id = "bus_master";
+	res->clks[3].id = "bus_slave";
 
-	res->slave_clk = devm_clk_get(dev, "bus_slave");
-	if (IS_ERR(res->slave_clk))
-		return PTR_ERR(res->slave_clk);
+	ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+	if (ret < 0)
+		return ret;
 
 	return 0;
 }
@@ -562,11 +553,7 @@ static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
 {
 	struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
 
-	clk_disable_unprepare(res->slave_clk);
-	clk_disable_unprepare(res->master_clk);
-	clk_disable_unprepare(res->cfg_clk);
-	clk_disable_unprepare(res->aux_clk);
-
+	clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
 	regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
 }
 
@@ -583,43 +570,14 @@ static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
 		return ret;
 	}
 
-	ret = clk_prepare_enable(res->aux_clk);
-	if (ret) {
-		dev_err(dev, "cannot prepare/enable aux clock\n");
-		goto err_aux_clk;
-	}
-
-	ret = clk_prepare_enable(res->cfg_clk);
-	if (ret) {
-		dev_err(dev, "cannot prepare/enable cfg clock\n");
-		goto err_cfg_clk;
-	}
-
-	ret = clk_prepare_enable(res->master_clk);
-	if (ret) {
-		dev_err(dev, "cannot prepare/enable master clock\n");
-		goto err_master_clk;
-	}
-
-	ret = clk_prepare_enable(res->slave_clk);
+	ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
 	if (ret) {
-		dev_err(dev, "cannot prepare/enable slave clock\n");
-		goto err_slave_clk;
+		dev_err(dev, "cannot prepare/enable clocks\n");
+		regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+		return ret;
 	}
 
 	return 0;
-
-err_slave_clk:
-	clk_disable_unprepare(res->master_clk);
-err_master_clk:
-	clk_disable_unprepare(res->cfg_clk);
-err_cfg_clk:
-	clk_disable_unprepare(res->aux_clk);
-
-err_aux_clk:
-	regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
-
-	return ret;
 }
 
 static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
-- 
2.25.1