On Fri, 2021-09-03 at 07:05 -0700, Guenter Roeck wrote:
> On 9/2/21 11:16 PM, Fengquan Chen wrote:
> > In some cases, we may need watchdog just to trigger an
> > internal soc reset without sending any output signal.
> >
> > Provide a disable_wdt_extrst parameter for configuration.
> > We can disable or enable it just by configuring dts.
> >
> > Signed-off-by: fengquan.chen <fengquan.chen@xxxxxxxxxxxx>
>
> Nit: You should set up git such that it uses "Fengquan Chen", not
> "fengquan.chen".
>
> Other than that, for my reference,
>
> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
>
> We'll have to wait for dt property approval before we can apply the
> patch.
>
> Thanks,
> Guenter
Thanks, i have uploaded a new v3 to fix the signed-off name,
and move the dt-binding patch to the first patch.
Best Regards
Fengquan
>
> > ---
> > drivers/watchdog/mtk_wdt.c | 7 +++++++
> > 1 file changed, 7 insertions(+)
> >
> > diff --git a/drivers/watchdog/mtk_wdt.c
> > b/drivers/watchdog/mtk_wdt.c
> > index 97ca993bd009..276b6cb7d225 100644
> > --- a/drivers/watchdog/mtk_wdt.c
> > +++ b/drivers/watchdog/mtk_wdt.c
> > @@ -63,6 +63,7 @@ struct mtk_wdt_dev {
> > void __iomem *wdt_base;
> > spinlock_t lock; /* protects WDT_SWSYSRST reg */
> > struct reset_controller_dev rcdev;
> > + bool disable_wdt_extrst;
> > };
> >
> > struct mtk_wdt_data {
> > @@ -240,6 +241,8 @@ static int mtk_wdt_start(struct watchdog_device
> > *wdt_dev)
> >
> > reg = ioread32(wdt_base + WDT_MODE);
> > reg &= ~(WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
> > + if (mtk_wdt->disable_wdt_extrst)
> > + reg &= ~WDT_MODE_EXRST_EN;
> > reg |= (WDT_MODE_EN | WDT_MODE_KEY);
> > iowrite32(reg, wdt_base + WDT_MODE);
> >
> > @@ -309,6 +312,10 @@ static int mtk_wdt_probe(struct
> > platform_device *pdev)
> > if (err)
> > return err;
> > }
> > +
> > + mtk_wdt->disable_wdt_extrst =
> > + of_property_read_bool(dev->of_node, "mediatek,disable-
> > extrst");
> > +
> > return 0;
> > }
> >
> >
>
>
