Re: [PATCH v6 2/2] watchdog: Add Renesas RZ/N1 Watchdog driver

[Jean-Jacques Hiblot]

On 27/04/2022 14:32, Geert Uytterhoeven wrote:
> Hi Jean-Jacques,
>
> On Wed, Apr 13, 2022 at 10:25 AM Jean-Jacques Hiblot
> <jjhiblot@xxxxxxxxxxxxxxx> wrote:
> > From: Phil Edworthy <phil.edworthy@xxxxxxxxxxx>
> >
> > This is a driver for the standard WDT on the RZ/N1 devices. This WDT has
> > very limited timeout capabilities. However, it can reset the device.
> > To do so, the corresponding bits in the SysCtrl RSTEN register need to
> > be enabled. This is not done by this driver.
> >
> > Signed-off-by: Phil Edworthy <phil.edworthy@xxxxxxxxxxx>
> > Signed-off-by: Jean-Jacques Hiblot <jjhiblot@xxxxxxxxxxxxxxx>
> > Reviewed-by: Tzung-Bi Shih <tzungbi@xxxxxxxxxx>
> Thanks for your patch!
>
> > --- /dev/null
> > +++ b/drivers/watchdog/rzn1_wdt.c
> > +static int rzn1_wdt_probe(struct platform_device *pdev)
> > +{
> > +       struct device *dev = &pdev->dev;
> > +       struct rzn1_watchdog *wdt;
> > +       struct device_node *np = dev->of_node;
> > +       struct clk *clk;
> > +       int ret;
> > +       int irq;
> > +
> > +       wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
> > +       if (!wdt)
> > +               return -ENOMEM;
> > +
> > +       wdt->base = devm_platform_ioremap_resource(pdev, 0);
> > +       if (IS_ERR(wdt->base))
> > +               return PTR_ERR(wdt->base);
> > +
> > +       irq = platform_get_irq(pdev, 0);
> > +       if (irq < 0)
> > +               return irq;
> > +
> > +       ret = devm_request_irq(dev, irq, rzn1_wdt_irq, 0,
> > +                              np->name, wdt);
> > +       if (ret) {
> > +               dev_err(dev, "failed to request irq %d\n", irq);
> > +               return ret;
> > +       }
> > +
> > +       clk = devm_clk_get(dev, NULL);
> > +       if (IS_ERR(clk)) {
> > +               dev_err(dev, "failed to get the clock\n");
> > +               return PTR_ERR(clk);
> > +       }
> > +
> > +       ret = clk_prepare_enable(clk);
> > +       if (ret) {
> > +               dev_err(dev, "failed to prepare/enable the clock\n");
> > +               return ret;
> > +       }
> > +
> > +       ret = devm_add_action_or_reset(dev, rzn1_wdt_clk_disable_unprepare,
> > +                                      clk);
> > +       if (ret) {
> > +               dev_err(dev, "failed to register clock unprepare callback\n");
> Please remove this error message.
> devm_add_action_or_reset() only fails when running out of memory,
> in which case the memory allocation core has already printed an
> error message.

OK. I'll remove this.

Thanks,

JJ

> > +               return ret;
> > +       }
> Gr{oetje,eeting}s,
>
>                          Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                  -- Linus Torvalds