| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
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/
Powered by blists - more mailing lists