This patch adds transceiver driver interface for runtime pm, in order to
support OTG case.
Signed-off-by: Hao Wu <hao.wu@xxxxxxxxx>
---
drivers/usb/host/ehci-intel-mid-pci.c | 47 ++++++++++++++++++++++++++++++++-
1 files changed, 46 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/host/ehci-intel-mid-pci.c b/drivers/usb/host/ehci-intel-mid-pci.c
index b05bc8a..9c9160b 100644
--- a/drivers/usb/host/ehci-intel-mid-pci.c
+++ b/drivers/usb/host/ehci-intel-mid-pci.c
@@ -144,18 +144,61 @@ static int ehci_mid_stop_host(struct intel_mid_otg_xceiv *iotg)
return 0;
}
+#ifdef CONFIG_PM_RUNTIME
+static int ehci_mid_runtime_suspend_host(struct intel_mid_otg_xceiv *iotg)
+{
+ int retval;
+
+ if (iotg == NULL)
+ return -EINVAL;
+
+ if (ehci_otg_driver.driver.pm == NULL)
+ return -EINVAL;
+
+ retval = ehci_otg_driver.driver.pm->runtime_suspend(iotg->otg.dev);
+ if (retval)
+ dev_warn(iotg->otg.dev, "runtime suspend failed\n");
+
+ return retval;
+}
+
+static int ehci_mid_runtime_resume_host(struct intel_mid_otg_xceiv *iotg)
+{
+ int retval;
+
+ if (iotg == NULL)
+ return -EINVAL;
+
+ if (ehci_otg_driver.driver.pm == NULL)
+ return -EINVAL;
+
+ retval = ehci_otg_driver.driver.pm->runtime_resume(iotg->otg.dev);
+ if (retval)
+ dev_warn(iotg->otg.dev, "runtime suspend failed\n");
+
+ return retval;
+}
+#else
+
+#define ehci_mid_runtime_suspend_host NULL
+#define ehci_mid_runtime_resume_host NULL
+
+#endif
+
static int intel_mid_ehci_driver_register(struct pci_driver *host_driver)
{
struct otg_transceiver *otg;
struct intel_mid_otg_xceiv *iotg;
otg = otg_get_transceiver();
- if (otg == NULL)
+ if (otg == NULL || host_driver == NULL)
return -EINVAL;
iotg = otg_to_mid_xceiv(otg);
iotg->start_host = ehci_mid_start_host;
iotg->stop_host = ehci_mid_stop_host;
+ iotg->runtime_suspend_host = ehci_mid_runtime_suspend_host;
+ iotg->runtime_resume_host = ehci_mid_runtime_resume_host;
/* notify host driver is registered */
atomic_notifier_call_chain(&iotg->iotg_notifier,
@@ -178,6 +221,8 @@ static void intel_mid_ehci_driver_unregister(struct pci_driver *host_driver)
iotg = otg_to_mid_xceiv(otg);
iotg->start_host = NULL;
iotg->stop_host = NULL;
+ iotg->runtime_suspend_host = NULL;
+ iotg->runtime_resume_host = NULL;
/* notify host driver is unregistered */
atomic_notifier_call_chain(&iotg->iotg_notifier,
--
1.6.0.6
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