Messages in this thread Patch in this message | | | From | Keerthy <> | Subject | [PATCH v5] pci: dwc: dra7xx: Add shutdown handler to cleanly turn off clocks | Date | Fri, 10 Nov 2017 13:57:12 +0530 |
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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> Acked-by: Kishon Vijay Abraham I <kishon@ti.com> ---
Changes in v5:
* Declared the dra7xx_pcie_shutdown function static
Changes in v4:
* Added the missing changes from v2!
Changes in v3:
* Pushed the function outside #ifdef CONFIG_PM_SLEEP. * Added more details to commit log.
Changes in v2:
* used a local dev pointer instead of dereferencing dev at multiple places. * dra7xx_pcie_stop_link before disabling clks in the shutdown path.
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 34427a6..d084800 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 +static 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 int dra7xx_pcie_resume_noirq(struct device *dev) .suppress_bind_attrs = true, .pm = &dra7xx_pcie_pm_ops, }, + .shutdown = dra7xx_pcie_shutdown, }; builtin_platform_driver_probe(dra7xx_pcie_driver, dra7xx_pcie_probe); -- 1.9.1
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