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Subject[BACKPORT 4.14.y 10/18] PCI: dra7xx: Add shutdown handler to cleanly turn off clocks
Date
From: Keerthy <j-keerthy@ti.com>

commit 9c049bea083fea21373b8baf51fe49acbe24e105 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 <j-keerthy@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/pci/dwc/pci-dra7xx.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index 7f5dfa169d0f..2e0d0b29cdcb 100644
--- 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);
--
2.17.1
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