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Date: Fri, 3 Jul 2015 16:33:45 +0530 From: Kishon Vijay Abraham I <kishon@...com> To: <bhelgaas@...gle.com>, <jingoohan1@...il.com>, <pratyush.anand@...il.com>, <linux-omap@...r.kernel.org>, <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <kishon@...com> CC: <nsekhar@...com> Subject: [PATCH 3/3] PCI: host: pci-dra7xx: add pm support to pci dra7xx Add PM support to pci-dra7xx so that PCI clocks can be disabled during suspend and enabled back during resume without affecting PCI functionality. Signed-off-by: Kishon Vijay Abraham I <kishon@...com> --- drivers/pci/host/pci-dra7xx.c | 74 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c index d8b6d66..1f5c039 100644 --- a/drivers/pci/host/pci-dra7xx.c +++ b/drivers/pci/host/pci-dra7xx.c @@ -433,6 +433,79 @@ static int __exit dra7xx_pcie_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int dra7xx_pcie_suspend(struct device *dev) +{ + struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev); + struct pcie_port *pp = &dra7xx->pp; + + dw_pcie_suspend_rc(pp); + + return 0; +} + +static int dra7xx_pcie_resume(struct device *dev) +{ + struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev); + struct pcie_port *pp = &dra7xx->pp; + + dw_pcie_resume_rc(pp); + + return 0; +} +static int dra7xx_pcie_suspend_noirq(struct device *dev) +{ + struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev); + int count = dra7xx->phy_count; + + while (count--) { + phy_power_off(dra7xx->phy[count]); + phy_exit(dra7xx->phy[count]); + } + + return 0; +} +static int dra7xx_pcie_resume_noirq(struct device *dev) +{ + struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev); + int phy_count = dra7xx->phy_count; + int ret; + int i; + + for (i = 0; i < phy_count; i++) { + ret = phy_init(dra7xx->phy[i]); + if (ret < 0) + goto err_phy; + + ret = phy_power_on(dra7xx->phy[i]); + if (ret < 0) { + phy_exit(dra7xx->phy[i]); + goto err_phy; + } + } + + return 0; + +err_phy: + while (--i >= 0) { + phy_power_off(dra7xx->phy[i]); + phy_exit(dra7xx->phy[i]); + } + + return ret; +} + +static const struct dev_pm_ops dra7xx_pcie_pm_ops = { + .suspend_noirq = dra7xx_pcie_suspend_noirq, + .suspend = dra7xx_pcie_suspend, + .resume_noirq = dra7xx_pcie_resume_noirq, + .resume = dra7xx_pcie_resume, +}; +#define DEV_PM_OPS (&dra7xx_pcie_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif + static const struct of_device_id of_dra7xx_pcie_match[] = { { .compatible = "ti,dra7-pcie", }, {}, @@ -444,6 +517,7 @@ static struct platform_driver dra7xx_pcie_driver = { .driver = { .name = "dra7-pcie", .of_match_table = of_dra7xx_pcie_match, + .pm = DEV_PM_OPS, }, }; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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