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

commit 9c049be upstream 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 <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]> Acked-by: Kishon Vijay Abraham I <[email protected]> Signed-off-by: Mathieu Poirier <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
Noltari · Nov 12, 2019 · 354d644 · 354d644
1 parent e8cff9c
commit 354d644
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
@@ -817,6 +817,22 @@ 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,
@@ -830,5 +846,6 @@ 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);