From: Kishon Vijay Abraham I <kishon@ti.com> To: <bhelgaas@google.com>, <linux-omap@vger.kernel.org>, <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <jingoohan1@gmail.com>, <nsekhar@ti.com> Cc: <kishon@ti.com> Subject: [PATCH v5 2/3] PCI: host: pci-dra7xx: add pm support to pci dra7xx Date: Fri, 31 Jul 2015 17:55:11 +0530 [thread overview] Message-ID: <1438345512-28973-3-git-send-email-kishon@ti.com> (raw) In-Reply-To: <1438345512-28973-1-git-send-email-kishon@ti.com> 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@ti.com> --- drivers/pci/host/pci-dra7xx.c | 51 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c index d8b6d66..08b999a 100644 --- a/drivers/pci/host/pci-dra7xx.c +++ b/drivers/pci/host/pci-dra7xx.c @@ -433,6 +433,56 @@ static int __exit dra7xx_pcie_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +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; +} +#endif + +static const struct dev_pm_ops dra7xx_pcie_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend_noirq, + dra7xx_pcie_resume_noirq) +}; + static const struct of_device_id of_dra7xx_pcie_match[] = { { .compatible = "ti,dra7-pcie", }, {}, @@ -444,6 +494,7 @@ static struct platform_driver dra7xx_pcie_driver = { .driver = { .name = "dra7-pcie", .of_match_table = of_dra7xx_pcie_match, + .pm = &dra7xx_pcie_pm_ops, }, }; -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: Kishon Vijay Abraham I <kishon@ti.com> To: bhelgaas@google.com, linux-omap@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, jingoohan1@gmail.com, nsekhar@ti.com Cc: kishon@ti.com Subject: [PATCH v5 2/3] PCI: host: pci-dra7xx: add pm support to pci dra7xx Date: Fri, 31 Jul 2015 17:55:11 +0530 [thread overview] Message-ID: <1438345512-28973-3-git-send-email-kishon@ti.com> (raw) In-Reply-To: <1438345512-28973-1-git-send-email-kishon@ti.com> 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@ti.com> --- drivers/pci/host/pci-dra7xx.c | 51 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c index d8b6d66..08b999a 100644 --- a/drivers/pci/host/pci-dra7xx.c +++ b/drivers/pci/host/pci-dra7xx.c @@ -433,6 +433,56 @@ static int __exit dra7xx_pcie_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +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; +} +#endif + +static const struct dev_pm_ops dra7xx_pcie_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend_noirq, + dra7xx_pcie_resume_noirq) +}; + static const struct of_device_id of_dra7xx_pcie_match[] = { { .compatible = "ti,dra7-pcie", }, {}, @@ -444,6 +494,7 @@ static struct platform_driver dra7xx_pcie_driver = { .driver = { .name = "dra7-pcie", .of_match_table = of_dra7xx_pcie_match, + .pm = &dra7xx_pcie_pm_ops, }, }; -- 1.7.9.5
next prev parent reply other threads:[~2015-07-31 12:25 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-07-31 12:25 [PATCH v5 0/3] dra7xx: Add PM support to PCIe Kishon Vijay Abraham I 2015-07-31 12:25 ` Kishon Vijay Abraham I 2015-07-31 12:25 ` [PATCH v5 1/3] PCI: host: pci-dra7xx: Disable pm_runtime on get_sync failure Kishon Vijay Abraham I 2015-07-31 12:25 ` Kishon Vijay Abraham I 2015-07-31 12:25 ` Kishon Vijay Abraham I [this message] 2015-07-31 12:25 ` [PATCH v5 2/3] PCI: host: pci-dra7xx: add pm support to pci dra7xx Kishon Vijay Abraham I 2015-07-31 12:25 ` [PATCH v5 3/3] PCI: host: pci-dra7xx: Idle the module by disabling MSE bit Kishon Vijay Abraham I 2015-07-31 12:25 ` Kishon Vijay Abraham I 2015-08-06 15:33 ` [PATCH v5 0/3] dra7xx: Add PM support to PCIe Jingoo Han 2015-08-06 15:33 ` Jingoo Han 2015-08-11 20:52 ` Bjorn Helgaas 2015-08-12 5:40 ` Kishon Vijay Abraham I 2015-08-12 5:40 ` Kishon Vijay Abraham I
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