Ping... Best Regards! Anson Huang
> -----Original Message----- > From: Anson Huang [mailto:anson.hu...@nxp.com] > Sent: 2019年2月12日 20:40 > To: jassisinghb...@gmail.com; shawn...@kernel.org; > s.ha...@pengutronix.de; ker...@pengutronix.de; feste...@gmail.com; > linux-kernel@vger.kernel.org; linux-arm-ker...@lists.infradead.org > Cc: dl-linux-imx <linux-...@nxp.com> > Subject: [PATCH] mailbox: imx: keep MU irq working during suspend/resume > > During noirq suspend phase, mailbox MU irq will be masked but many > drivers still need to communicate with system controller firmware via > mailbox, if MU irq is masked, it will cause RPC timeout as below: > > [ 23.372103] imx-scu scu: RPC send msg timeout > > Setting MU irq to be wakeup source is NOT working as GIC driver does NOT > have .irq_set_wake implemented, so to support suspend/resume, just make > imx mailbox driver NOT suspend, since MU is always a wakeup source on > i.MX platforms with system controller inside, and its power/clock is > maintained by system controller, mailbox driver no need to manage them. > > Signed-off-by: Anson Huang <anson.hu...@nxp.com> > --- > drivers/mailbox/imx-mailbox.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c > index 774362a..85fc5b5 100644 > --- a/drivers/mailbox/imx-mailbox.c > +++ b/drivers/mailbox/imx-mailbox.c > @@ -187,8 +187,8 @@ static int imx_mu_startup(struct mbox_chan *chan) > return 0; > } > > - ret = request_irq(priv->irq, imx_mu_isr, IRQF_SHARED, cp->irq_desc, > - chan); > + ret = request_irq(priv->irq, imx_mu_isr, IRQF_SHARED | > + IRQF_NO_SUSPEND, cp->irq_desc, chan); > if (ret) { > dev_err(priv->dev, > "Unable to acquire IRQ %d\n", priv->irq); > -- > 2.7.4
