From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from devils.ext.ti.com ([198.47.26.153]:43588 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755609AbbG1Nyt (ORCPT ); Tue, 28 Jul 2015 09:54:49 -0400 From: Kishon Vijay Abraham I To: , , , CC: , Subject: [PATCH v4 2/3] PCI: host: pci-dra7xx: add pm support to pci dra7xx Date: Tue, 28 Jul 2015 19:24:35 +0530 Message-ID: <1438091676-21243-3-git-send-email-kishon@ti.com> In-Reply-To: <1438091676-21243-1-git-send-email-kishon@ti.com> References: <1438091676-21243-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-pci-owner@vger.kernel.org List-ID: 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 --- 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