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PCI: dra7xx: Add PM support

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Add PM support to pci-dra7xx so PCI clocks can be disabled during suspend
and enabled during resume without affecting PCI functionality.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jingoo Han <jingoohan1@gmail.com>
This commit is contained in:
Kishon Vijay Abraham I 2015-07-31 17:55:11 +05:30 committed by Bjorn Helgaas
parent 0e2bdb0e7a
commit e52eb445ea
1 changed files with 51 additions and 0 deletions
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51
drivers/pci/host/pci-dra7xx.c
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@ -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,
},
};