linux-kernel - [PATCH 04/16] PCI: samsung: Use clock bulk API to get clocks

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Date:   Tue, 14 Feb 2023 17:43:21 +0530
From:   Shradha Todi <shradha.t@...sung.com>
To:     lpieralisi@...nel.org, kw@...ux.com, robh@...nel.org,
        bhelgaas@...gle.com, krzysztof.kozlowski+dt@...aro.org,
        alim.akhtar@...sung.com, jingoohan1@...il.com,
        Sergey.Semin@...kalelectronics.ru, lukas.bulwahn@...il.com,
        hongxing.zhu@....com, tglx@...utronix.de, m.szyprowski@...sung.com,
        jh80.chung@...sung.co, pankaj.dubey@...sung.com
Cc:     linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shradha Todi <shradha.t@...sung.com>
Subject: [PATCH 04/16] PCI: samsung: Use clock bulk API to get clocks

Adopt to clock bulk API to handle clocks.

Signed-off-by: Shradha Todi <shradha.t@...sung.com>
---
 drivers/pci/controller/dwc/pci-samsung.c | 46 ++++++------------------
 1 file changed, 11 insertions(+), 35 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-samsung.c b/drivers/pci/controller/dwc/pci-samsung.c
index cfe384aee754..6c07d3f151be 100644
--- a/drivers/pci/controller/dwc/pci-samsung.c
+++ b/drivers/pci/controller/dwc/pci-samsung.c
@@ -54,8 +54,8 @@
 struct exynos_pcie {
 	struct dw_pcie			pci;
 	void __iomem			*elbi_base;
-	struct clk			*clk;
-	struct clk			*bus_clk;
+	struct clk_bulk_data		*clks;
+	int				clk_cnt;
 	struct phy			*phy;
 	struct regulator_bulk_data	supplies[2];
 };
@@ -65,30 +65,18 @@ static int exynos_pcie_init_clk_resources(struct exynos_pcie *ep)
 	struct device *dev = ep->pci.dev;
 	int ret;
 
-	ret = clk_prepare_enable(ep->clk);
-	if (ret) {
-		dev_err(dev, "cannot enable pcie rc clock");
+	ret = devm_clk_bulk_get_all(dev, &ep->clks);
+	if (ret < 0)
 		return ret;
-	}
 
-	ret = clk_prepare_enable(ep->bus_clk);
-	if (ret) {
-		dev_err(dev, "cannot enable pcie bus clock");
-		goto err_bus_clk;
-	}
+	ep->clk_cnt = ret;
 
-	return 0;
-
-err_bus_clk:
-	clk_disable_unprepare(ep->clk);
-
-	return ret;
+	return clk_bulk_prepare_enable(ep->clk_cnt, ep->clks);
 }
 
 static void exynos_pcie_deinit_clk_resources(struct exynos_pcie *ep)
 {
-	clk_disable_unprepare(ep->bus_clk);
-	clk_disable_unprepare(ep->clk);
+	clk_bulk_disable_unprepare(ep->clk_cnt, ep->clks);
 }
 
 static void exynos_pcie_writel(void __iomem *base, u32 val, u32 reg)
@@ -332,17 +320,9 @@ static int exynos_pcie_probe(struct platform_device *pdev)
 	if (IS_ERR(ep->elbi_base))
 		return PTR_ERR(ep->elbi_base);
 
-	ep->clk = devm_clk_get(dev, "pcie");
-	if (IS_ERR(ep->clk)) {
-		dev_err(dev, "Failed to get pcie rc clock\n");
-		return PTR_ERR(ep->clk);
-	}
-
-	ep->bus_clk = devm_clk_get(dev, "pcie_bus");
-	if (IS_ERR(ep->bus_clk)) {
-		dev_err(dev, "Failed to get pcie bus clock\n");
-		return PTR_ERR(ep->bus_clk);
-	}
+	ret = exynos_pcie_init_clk_resources(ep);
+	if (ret < 0)
+		return ret;
 
 	ep->supplies[0].supply = "vdd18";
 	ep->supplies[1].supply = "vdd10";
@@ -351,10 +331,6 @@ static int exynos_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = exynos_pcie_init_clk_resources(ep);
-	if (ret)
-		return ret;
-
 	ret = regulator_bulk_enable(ARRAY_SIZE(ep->supplies), ep->supplies);
 	if (ret)
 		return ret;
@@ -369,8 +345,8 @@ static int exynos_pcie_probe(struct platform_device *pdev)
 
 fail_probe:
 	phy_exit(ep->phy);
-	exynos_pcie_deinit_clk_resources(ep);
 	regulator_bulk_disable(ARRAY_SIZE(ep->supplies), ep->supplies);
+	exynos_pcie_deinit_clk_resources(ep);
 
 	return ret;
 }
-- 
2.17.1