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

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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>
This commit is contained in:
Keerthy 2017-09-20 10:54:15 +05:30 committed by Bjorn Helgaas
parent 9e66317d3c
commit 9c049bea08
1 changed files with 17 additions and 0 deletions
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17
drivers/pci/dwc/pci-dra7xx.c
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@ -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);