diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2018-05-23 10:53:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-24 18:09:36 +0200 |
| commit | ad0c542cd218d1721b2e07e79a79763370124822 (patch) | |
| tree | e1d11eb544ce7d3652bc2074da60d035137655f7 /drivers/usb | |
| parent | xhci: debugfs: add debugfs interface to enable compliance mode for a port (diff) | |
| download | linux-ad0c542cd218d1721b2e07e79a79763370124822.tar.xz linux-ad0c542cd218d1721b2e07e79a79763370124822.zip | |
usb: mtu3: re-enable controller to accept LPM request after LPM resume
After the controller receives a LPM request, it will reject the LPM
request, and need software to re-enable it after LPM resume if the
controller doesn't remote wakeup from L1 automatically
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/mtu3/mtu3_core.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index b1b99a8f6a7a..65ff53ad06a0 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -176,7 +176,7 @@ static void mtu3_intr_enable(struct mtu3 *mtu) mtu3_writel(mbase, U3D_LV1IESR, value); /* Enable U2 common USB interrupts */ - value = SUSPEND_INTR | RESUME_INTR | RESET_INTR; + value = SUSPEND_INTR | RESUME_INTR | RESET_INTR | LPM_RESUME_INTR; mtu3_writel(mbase, U3D_COMMON_USB_INTR_ENABLE, value); if (mtu->is_u3_ip) { @@ -692,6 +692,12 @@ static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu) if (u2comm & RESET_INTR) mtu3_gadget_reset(mtu); + if (u2comm & LPM_RESUME_INTR) { + if (!(mtu3_readl(mbase, U3D_POWER_MANAGEMENT) & LPM_HRWE)) + mtu3_setbits(mbase, U3D_USB20_MISC_CONTROL, + LPM_U3_ACK_EN); + } + return IRQ_HANDLED; } |