From ad0c542cd218d1721b2e07e79a79763370124822 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 23 May 2018 16:53:15 +0800 Subject: 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_core.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/usb/mtu3/mtu3_core.c') 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; } -- cgit