usb: mtu3: enable hardware remote wakeup from L1 automatically

Enable hardware remote wakeup from L1 automatically based on the FIFO
status, instead of manual way.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index 3dce5fd..981e4e8 100644 (file)
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -180,7 +180,7 @@ 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 | LPM_RESUME_INTR;
+       value = SUSPEND_INTR | RESUME_INTR | RESET_INTR;
        mtu3_writel(mbase, U3D_COMMON_USB_INTR_ENABLE, value);
 
        if (mtu->is_u3_ip) {
@@ -594,6 +594,8 @@ static void mtu3_regs_init(struct mtu3 *mtu)
        mtu3_writel(mbase, U3D_DEVICE_CONF, 0);
        /* vbus detected by HW */
        mtu3_clrbits(mbase, U3D_MISC_CTRL, VBUS_FRC_EN | VBUS_ON);
+       /* enable automatical HWRW from L1 */
+       mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, LPM_HRWE);
 }
 
 static irqreturn_t mtu3_link_isr(struct mtu3 *mtu)
@@ -706,12 +708,6 @@ 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;
 }