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    Subject[PATCH 4.14 052/105] 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>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/pci/dwc/pci-dra7xx.c | 17 +++++++++++++++++
    1 file changed, 17 insertions(+)

    --- a/drivers/pci/dwc/pci-dra7xx.c
    +++ b/drivers/pci/dwc/pci-dra7xx.c
    @@ -817,6 +817,22 @@ static int dra7xx_pcie_resume_noirq(stru
    }
    #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_pci
    .suppress_bind_attrs = true,
    .pm = &dra7xx_pcie_pm_ops,
    },
    + .shutdown = dra7xx_pcie_shutdown,
    };
    builtin_platform_driver_probe(dra7xx_pcie_driver, dra7xx_pcie_probe);

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