diff options
| author | Douglas Anderson <dianders@chromium.org> | 2019-05-20 20:56:04 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2019-06-18 11:58:28 +0300 |
| commit | c846b03ff767149d75d4d8dca6d3d4945a21074a (patch) | |
| tree | eb0e2dcdb7b697427ee610c252268fe08efd7b01 /drivers/usb/dwc2/core.h | |
| parent | 1d390437f605db28596ad4c4bfeca2fed052c025 (diff) | |
| download | linux-c846b03ff767149d75d4d8dca6d3d4945a21074a.tar.xz | |
USB: dwc2: Don't turn off the usbphy in suspend if wakeup is enabled
If the 'snps,need-phy-for-wake' is set in the device tree then:
- We know that we can wakeup, so call device_set_wakeup_capable().
The USB core will use this knowledge to enable wakeup by default.
- We know that we should keep the PHY on during suspend if something
on our root hub needs remote wakeup. This requires the patch (USB:
Export usb_wakeup_enabled_descendants()). Note that we don't keep
the PHY on at suspend time if it's not needed because it would be a
power draw.
If we later find some users of dwc2 that can support wakeup without
keeping the PHY on we may want to add a way to call
device_set_wakeup_capable() without keeping the PHY on at suspend
time.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/core.h')
| -rw-r--r-- | drivers/usb/dwc2/core.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 152ac41dfb2d..d08d070a0fb6 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -861,6 +861,9 @@ struct dwc2_hregs_backup { * @hibernated: True if core is hibernated * @reset_phy_on_wake: Quirk saying that we should assert PHY reset on a * remote wakeup. + * @phy_off_for_suspend: Status of whether we turned the PHY off at suspend. + * @need_phy_for_wake: Quirk saying that we should keep the PHY on at + * suspend if we need USB to wake us up. * @frame_number: Frame number read from the core. For both device * and host modes. The value ranges are from 0 * to HFNUM_MAX_FRNUM. @@ -1049,6 +1052,8 @@ struct dwc2_hsotg { unsigned int ll_hw_enabled:1; unsigned int hibernated:1; unsigned int reset_phy_on_wake:1; + unsigned int need_phy_for_wake:1; + unsigned int phy_off_for_suspend:1; u16 frame_number; struct phy *phy; @@ -1438,6 +1443,7 @@ int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg); int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg); int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, int reset); +bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2); static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg) { schedule_work(&hsotg->phy_reset_work); } #else @@ -1463,6 +1469,8 @@ static inline int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg) static inline int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, int reset) { return 0; } +static inline bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2) +{ return false; } static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg) {} #endif |