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usb: mtu3: re-enable controller to accept LPM request after LPM resume

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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>
This commit is contained in:
Chunfeng Yun 2018-05-23 16:53:15 +08:00 committed by Greg Kroah-Hartman
parent 87a0380218
commit ad0c542cd2
1 changed files with 7 additions and 1 deletions
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8
drivers/usb/mtu3/mtu3_core.c
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@ -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;
}