[RFC PATCH 16/40] PCI: keystone: Invoke pm_runtime APIs to enable clock

[Kishon Vijay Abraham I]

Invoke pm_runtime APIs to enable clocks and remove explicit
clock enabling using clk_prepare_enable().

Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
---
 drivers/pci/controller/dwc/pci-keystone.c | 29 +++++++++++------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c 
b/drivers/pci/controller/dwc/pci-keystone.c
index b013776d9256..f230344e1f4e 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -95,7 +95,6 @@ static void ks_pcie_stop_link(struct dw_pcie *pci);
 
 struct keystone_pcie {
        struct dw_pcie          *pci;
-       struct  clk             *clk;
        int                     num_lanes;
        struct phy              **phy;
        struct device_link      **link;
@@ -879,26 +878,25 @@ static int __init ks_pcie_probe(struct platform_device 
*pdev)
        }
 
        platform_set_drvdata(pdev, ks_pcie);
-       ks_pcie->clk = devm_clk_get(dev, "pcie");
-       if (IS_ERR(ks_pcie->clk)) {
-               dev_err(dev, "Failed to get pcie rc clock\n");
-               ret = PTR_ERR(ks_pcie->clk);
-               goto err_get_irq;
-       }
 
-       ret = clk_prepare_enable(ks_pcie->clk);
-       if (ret)
-               goto err_get_irq;
+       pm_runtime_enable(dev);
+       ret = pm_runtime_get_sync(dev);
+       if (ret < 0) {
+               dev_err(dev, "pm_runtime_get_sync failed\n");
+               goto err_get_sync;
+       }
 
        ret = ks_pcie_add_pcie_port(ks_pcie, pdev);
        if (ret < 0)
-               goto fail_clk;
+               goto err_get_sync;
 
        ks_pcie_enable_error_irq(ks_pcie);
 
        return 0;
-fail_clk:
-       clk_disable_unprepare(ks_pcie->clk);
+
+err_get_sync:
+       pm_runtime_put(dev);
+       pm_runtime_disable(dev);
 
 err_get_irq:
        ks_pcie_disable_phy(ks_pcie);
@@ -915,10 +913,11 @@ static int __exit ks_pcie_remove(struct platform_device 
*pdev)
        struct keystone_pcie *ks_pcie = platform_get_drvdata(pdev);
        struct device_link **link = ks_pcie->link;
        int num_lanes = ks_pcie->num_lanes;
+       struct device *dev = &pdev->dev;
 
-       clk_disable_unprepare(ks_pcie->clk);
+       pm_runtime_put(dev);
+       pm_runtime_disable(dev);
        ks_pcie_disable_phy(ks_pcie);
-
        while (num_lanes--)
                device_link_del(link[num_lanes]);
 
-- 
2.17.1