diff options
| author | Artur Petrosyan <Arthur.Petrosyan@synopsys.com> | 2021-04-13 09:36:22 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-13 12:25:11 +0200 |
| commit | cbe1e903e5ab690c34510ab98df749ce6377ad5f (patch) | |
| tree | 2e9d0c0e19a196b8885dfce8168bbd3c069480ed /drivers/usb/dwc2 | |
| parent | usb: dwc2: Add host clock gating support functions (diff) | |
| download | linux-cbe1e903e5ab690c34510ab98df749ce6377ad5f.tar.xz linux-cbe1e903e5ab690c34510ab98df749ce6377ad5f.zip | |
usb: dwc2: Allow entering clock gating from USB_SUSPEND interrupt
If core doesn't support hibernation or partial power
down power saving options, power can still be saved
using clock gating on all the clocks.
- Added entering clock gating state from USB_SUSPEND
interrupt.
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210413073623.65355A022E@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/core_intr.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c index 8c0152b514be..ab7fe303c0f9 100644 --- a/drivers/usb/dwc2/core_intr.c +++ b/drivers/usb/dwc2/core_intr.c @@ -529,14 +529,18 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg) /* Ask phy to be suspended */ if (!IS_ERR_OR_NULL(hsotg->uphy)) usb_phy_set_suspend(hsotg->uphy, true); - } - - if (hsotg->hw_params.hibernation) { + } else if (hsotg->hw_params.hibernation) { ret = dwc2_enter_hibernation(hsotg, 0); if (ret && ret != -ENOTSUPP) dev_err(hsotg->dev, "%s: enter hibernation failed\n", __func__); + } else { + /* + * If not hibernation nor partial power down are supported, + * clock gating is used to save power. + */ + dwc2_gadget_enter_clock_gating(hsotg); } skip_power_saving: /* |