PCI: exynos: Adapt to use bulk clock APIs

There is no need to hardcode the clock info in the driver as driver can
rely on the devicetree to supply the clocks required for the functioning
of the peripheral.

Thus, remove the static clock info and obtain the platform supplied
clocks. All the clocks supplied are obtained and enabled using the
devm_clk_bulk_get_all_enable() API.

[kwilczynski: commit log]
Link: https://lore.kernel.org/linux-pci/20240220084046.23786-3-shradha.t@samsung.com
Signed-off-by: Shradha Todi <shradha.t@samsung.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index a33fa98a252eff20dca7247c54019c5afd2d6930..88d7163d64e7ff01398de8882b23725e227c1316 100644 (file)
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -54,43 +54,11 @@
 struct exynos_pcie {
        struct dw_pcie                  pci;
        void __iomem                    *elbi_base;
-       struct clk                      *clk;
-       struct clk                      *bus_clk;
+       struct clk_bulk_data            *clks;
        struct phy                      *phy;
        struct regulator_bulk_data      supplies[2];
 };
 
-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");
-               return ret;
-       }
-
-       ret = clk_prepare_enable(ep->bus_clk);
-       if (ret) {
-               dev_err(dev, "cannot enable pcie bus clock");
-               goto err_bus_clk;
-       }
-
-       return 0;
-
-err_bus_clk:
-       clk_disable_unprepare(ep->clk);
-
-       return ret;
-}
-
-static void exynos_pcie_deinit_clk_resources(struct exynos_pcie *ep)
-{
-       clk_disable_unprepare(ep->bus_clk);
-       clk_disable_unprepare(ep->clk);
-}
-
 static void exynos_pcie_writel(void __iomem *base, u32 val, u32 reg)
 {
        writel(val, base + reg);
@@ -332,17 +300,9 @@ 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 = devm_clk_bulk_get_all_enable(dev, &ep->clks);
+       if (ret < 0)
+               return ret;
 
        ep->supplies[0].supply = "vdd18";
        ep->supplies[1].supply = "vdd10";
@@ -351,10 +311,6 @@ 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;
@@ -369,7 +325,6 @@ 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);
 
        return ret;
@@ -383,7 +338,6 @@ static void exynos_pcie_remove(struct platform_device *pdev)
        exynos_pcie_assert_core_reset(ep);
        phy_power_off(ep->phy);
        phy_exit(ep->phy);
-       exynos_pcie_deinit_clk_resources(ep);
        regulator_bulk_disable(ARRAY_SIZE(ep->supplies), ep->supplies);
 }