diff options
author | Kishon Vijay Abraham I <kishon@ti.com> | 2015-07-31 12:25:11 (GMT) |
---|---|---|
committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-08-11 20:50:14 (GMT) |
commit | e52eb445ea1d97bf7fb92d2297e487a305392136 (patch) | |
tree | 3da1ed6bb96a211ae316300bd91e1f5a6df170dd /drivers/pci | |
parent | 0e2bdb0e7abf4b5170874e415ec42df547916dd3 (diff) | |
download | linux-e52eb445ea1d97bf7fb92d2297e487a305392136.tar.xz |
PCI: dra7xx: Add PM support
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>
Diffstat (limited to 'drivers/pci')
-rw-r--r-- | drivers/pci/host/pci-dra7xx.c | 51 |
1 files changed, 51 insertions, 0 deletions
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, }, }; |