diff options
| author | Artur Petrosyan <Arthur.Petrosyan@synopsys.com> | 2021-04-13 10:36:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-13 13:25:11 +0300 |
| commit | 5d240efddc7f02e1454ed2fd8caf57b891e23b55 (patch) | |
| tree | e3fafe1b1a12243c7fb81e03d6e3b7221e3c799b /drivers/usb/dwc2 | |
| parent | cbe1e903e5ab690c34510ab98df749ce6377ad5f (diff) | |
| download | linux-5d240efddc7f02e1454ed2fd8caf57b891e23b55.tar.xz | |
usb: dwc2: Add exit clock gating from wakeup interrupt
Added exit from clock gating mode when wakeup interrupt
is detected. To exit from the clock gating
in device mode "dwc2_gadget_exit_clock_gating()"
function is used with rem_wakeup parameter 0. To exit
clock gating in host mode "dwc2_host_exit_clock_gating()"
with rem_wakeup parameter 1.
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210413073630.EF2CEA0094@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 | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c index ab7fe303c0f9..c764407e7633 100644 --- a/drivers/usb/dwc2/core_intr.c +++ b/drivers/usb/dwc2/core_intr.c @@ -415,17 +415,24 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg) if (dwc2_is_device_mode(hsotg)) { dev_dbg(hsotg->dev, "DSTS=0x%0x\n", dwc2_readl(hsotg, DSTS)); - if (hsotg->lx_state == DWC2_L2 && hsotg->in_ppd) { - u32 dctl = dwc2_readl(hsotg, DCTL); - /* Clear Remote Wakeup Signaling */ - dctl &= ~DCTL_RMTWKUPSIG; - dwc2_writel(hsotg, dctl, DCTL); - ret = dwc2_exit_partial_power_down(hsotg, 1, - true); - if (ret) - dev_err(hsotg->dev, - "exit partial_power_down failed\n"); - call_gadget(hsotg, resume); + if (hsotg->lx_state == DWC2_L2) { + if (hsotg->in_ppd) { + u32 dctl = dwc2_readl(hsotg, DCTL); + /* Clear Remote Wakeup Signaling */ + dctl &= ~DCTL_RMTWKUPSIG; + dwc2_writel(hsotg, dctl, DCTL); + ret = dwc2_exit_partial_power_down(hsotg, 1, + true); + if (ret) + dev_err(hsotg->dev, + "exit partial_power_down failed\n"); + call_gadget(hsotg, resume); + } + + /* Exit gadget mode clock gating. */ + if (hsotg->params.power_down == + DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended) + dwc2_gadget_exit_clock_gating(hsotg, 0); } else { /* Change to L0 state */ hsotg->lx_state = DWC2_L0; @@ -440,6 +447,10 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg) "exit partial_power_down failed\n"); } + if (hsotg->params.power_down == + DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended) + dwc2_host_exit_clock_gating(hsotg, 1); + /* * If we've got this quirk then the PHY is stuck upon * wakeup. Assert reset. This will propagate out and |