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usb: musb: core: remove unnecessary reg access from resume IRQ

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when musb is operating as host and a remote wakeup
fires up, a resume interrupt will be raised. At that
point SUSPENDM bit is automatically cleared and
RESUME bit is automatically set.

Remove those two from IRQ handler.

Tested-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2015-02-25 14:30:55 -06:00
parent 0acff6b831
commit 46571889ec
1 changed files with 0 additions and 15 deletions
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15
drivers/usb/musb/musb_core.c
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@ -538,27 +538,12 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
usb_otg_state_string(musb->xceiv->otg->state));
if (devctl & MUSB_DEVCTL_HM) {
void __iomem *mbase = musb->mregs;
u8 power;
switch (musb->xceiv->otg->state) {
case OTG_STATE_A_SUSPEND:
/* remote wakeup? later, GetPortStatus
* will stop RESUME signaling
*/
power = musb_readb(musb->mregs, MUSB_POWER);
if (power & MUSB_POWER_SUSPENDM) {
/* spurious */
musb->int_usb &= ~MUSB_INTR_SUSPEND;
dev_dbg(musb->controller, "Spurious SUSPENDM\n");
break;
}
power &= ~MUSB_POWER_SUSPENDM;
musb_writeb(mbase, MUSB_POWER,
power | MUSB_POWER_RESUME);
musb->port1_status |=
(USB_PORT_STAT_C_SUSPEND << 16)
| MUSB_PORT_STAT_RESUME;