On Thu, 2018-05-03 at 14:20 +0800, Argus Lin wrote:
> On Thu, 2018-05-03 at 12:01 +0800, Sean Wang wrote:
> > };
[...]
> > > @@ -1503,11 +1581,13 @@ static int pwrap_probe(struct platform_device *pdev)
> > > if (IS_ERR(wrp->base))
> > > return PTR_ERR(wrp->base);
> > >
> > > - wrp->rstc = devm_reset_control_get(wrp->dev, "pwrap");
> > > - if (IS_ERR(wrp->rstc)) {
> > > - ret = PTR_ERR(wrp->rstc);
> > > - dev_dbg(wrp->dev, "cannot get pwrap reset: %d\n", ret);
> > > - return ret;
> > > + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_RESET)) {
> > > + wrp->rstc = devm_reset_control_get(wrp->dev, "pwrap");
> >
> > there should be a reset bit present for pwrap on infrasys.
> >
> > the specific condition can be dropped when the reset cell is exported from infrasys and then the device has a reference to it.
> hmm, I think it need to keep here.
> because after pwrap initialized, it can't be reset alone.
> It needs to reset PMIC simultaneously, too.
Reset a pair, either a master or its slave, all had been a part of
pwrap_init.
The reset controller provided here is just to reset pwrap device.
And for its slave reset, it should be done by pwrap_reset_spislave.
So for MT6397, it should be able to fall into the same procedure.
> >
> > > + if (IS_ERR(wrp->rstc)) {
> > > + ret = PTR_ERR(wrp->rstc);
> > > + dev_dbg(wrp->dev, "cannot get pwrap reset: %d\n", ret);
> > > + return ret;
> > > + }
> > > }
> > >
> > > if (HAS_CAP(wrp->master->caps, PWRAP_CAP_BRIDGE)) {
> > > @@ -1549,9 +1629,17 @@ static int pwrap_probe(struct platform_device *pdev)
> > > if (ret)
> > > goto err_out1;
> > >
> > > - /* Enable internal dynamic clock */
> > > - pwrap_writel(wrp, 1, PWRAP_DCM_EN);
> > > - pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
> > > + /*
> > > + * add dcm capability check
> > > + */
> > > + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_DCM)) {
> >
> > the specific condition can be dropped since so far all devices the driver can support are owning PWRAP_CAP_DCM
> We did not support DCM for future chips.
> MT6797 is the last one.
> This why I want to add judgement here.
The series is only for MT6797 pwrap, so it's fine with only adding these
things the SoC actually relies on.
PWRAP_CAP_DCM should not be added until a new SoC without dcm is really
introduced.
> >
> > > + if (wrp->master->type == PWRAP_MT6797)
> > > + pwrap_writel(wrp, 3, PWRAP_DCM_EN);
> >
> > the setup for MT6797 can be moved into .init_soc_specific callback ?
>
> I think put it here is more generally.
> >
> > > + else
> > > + pwrap_writel(wrp, 1, PWRAP_DCM_EN);
> > > +
> > > + pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
> > > + }
> > >
> > > /*
> > > * The PMIC could already be initialized by the bootloader.
> > > @@ -1580,6 +1668,12 @@ static int pwrap_probe(struct platform_device *pdev)
> > > pwrap_writel(wrp, wrp->master->wdt_src, PWRAP_WDT_SRC_EN);
> > > pwrap_writel(wrp, 0x1, PWRAP_TIMER_EN);
> > > pwrap_writel(wrp, wrp->master->int_en_all, PWRAP_INT_EN);
> > > + /*
> > > + * We add INT1 interrupt to handle starvation and request exception
> > > + * If we support it, we should enable them here.
> > > + */
> > > + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN))
> > > + pwrap_writel(wrp, wrp->master->int1_en_all, PWRAP_INT1_EN);
> > >
> >
> > if there is no explicitly enabling on INT1, then ISR handling for INT1 is also unnecessary
>
> It's ok for me.
> >
> > > irq = platform_get_irq(pdev, 0);
> > > ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt,
> >
> >
> >
>
>
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