PCI: dra7xx: Add shutdown handler to cleanly turn off clocks

Add shutdown handler to cleanly turn off clocks.  This will help in cases of
kexec where in a new kernel can boot abruptly.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index 34427a6a15af..d0848006945a 100644
--- a/drivers/pci/dwc/pci-dra7xx.c
+++ b/drivers/pci/dwc/pci-dra7xx.c
@@ -794,6 +794,22 @@ static int dra7xx_pcie_resume_noirq(struct device *dev)
 }
 #endif
 
+void dra7xx_pcie_shutdown(struct platform_device *pdev)
+{
+        struct device *dev = &pdev->dev;
+        struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev);
+        int ret;
+
+        dra7xx_pcie_stop_link(dra7xx->pci);
+
+        ret = pm_runtime_put_sync(dev);
+        if (ret < 0)
+                dev_dbg(dev, "pm_runtime_put_sync failed\n");
+
+        pm_runtime_disable(dev);
+        dra7xx_pcie_disable_phy(dra7xx);
+}
+
 static const struct dev_pm_ops dra7xx_pcie_pm_ops = {
         SET_SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend, dra7xx_pcie_resume)
         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend_noirq,
@@ -807,5 +823,6 @@ static struct platform_driver dra7xx_pcie_driver = {
                 .suppress_bind_attrs = true,
                 .pm     = &dra7xx_pcie_pm_ops,
         },
+        .shutdown = dra7xx_pcie_shutdown,
 };
 builtin_platform_driver_probe(dra7xx_pcie_driver, dra7xx_pcie_probe);