From: Andy Luo <yifei.luo@xxxxxxxxx>
This patch enables runtime pm support for usb host driver
Signed-off-by: Andy Luo <yifei.luo@xxxxxxxxx>
Signed-off-by: Hao Wu <hao.wu@xxxxxxxxx>
---
drivers/usb/core/hcd-pci.c | 30 +++++++++++++++++++++++-------
1 files changed, 23 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 3799573..efa388c 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -339,7 +339,7 @@ EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
#ifdef CONFIG_PM_OPS
#ifdef CONFIG_PPC_PMAC
-static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
+static void hcd_pci_set_platform_config(struct pci_dev *pci_dev, int enable)
{
/* Enanble or disable ASIC clocks for USB */
if (machine_is(powermac)) {
@@ -352,9 +352,25 @@ static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
}
}
-#else
+#elif defined(CONFIG_X86_MRST)
+static void hcd_pci_set_platform_config(struct pci_dev *pci_dev, int enable)
+{
+ /* Check if it is Intel Medfield platform */
+ if (pci_dev->vendor == PCI_VENDOR_ID_INTEL &&
+ pci_dev->device == 0x0829) {
+ if (enable) {
+ pci_restore_state(pci_dev);
+ pci_set_power_state(pci_dev, PCI_D0);
+ } else {
+ pci_save_state(pci_dev);
+ pci_set_power_state(pci_dev, PCI_D3hot);
+ }
+ }
+}
-static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
+#else
+static inline void hcd_pci_set_platform_config(struct pci_dev *pci_dev,
+ int enable)
{}
#endif /* CONFIG_PPC_PMAC */
@@ -493,7 +509,7 @@ static int hcd_pci_suspend_noirq(struct device *dev)
return retval;
}
- powermac_set_asic(pci_dev, 0);
+ hcd_pci_set_platform_config(pci_dev, 0);
return retval;
}
@@ -501,7 +517,7 @@ static int hcd_pci_resume_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- powermac_set_asic(pci_dev, 1);
+ hcd_pci_set_platform_config(pci_dev, 1);
/* Go back to D0 and disable remote wakeup */
pci_back_from_sleep(pci_dev);
@@ -536,7 +552,7 @@ static int hcd_pci_runtime_suspend(struct device *dev)
retval = suspend_common(dev, true);
if (retval == 0)
- powermac_set_asic(to_pci_dev(dev), 0);
+ hcd_pci_set_platform_config(to_pci_dev(dev), 0);
dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval);
return retval;
}
@@ -545,7 +561,7 @@ static int hcd_pci_runtime_resume(struct device *dev)
{
int retval;
- powermac_set_asic(to_pci_dev(dev), 1);
+ hcd_pci_set_platform_config(to_pci_dev(dev), 1);
retval = resume_common(dev, PM_EVENT_AUTO_RESUME);
dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval);
return retval;
--
1.6.0.6
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
