On Wed, 19 Jan 2022 18:37:40 +0100
Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> wrote:
> On 19/01/2022 12:27:39-0500, Hugo Villeneuve wrote:
> > From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
> >
> > If writing to CLKOUT register fails, the probe operation will be aborted
> > without a meaningful error message.
> >
>
> The current trend is to remove debug messages, please do not add more :)
Hi,
If the read operation fails, the probe function will exit silently, and our RTC chip will not work. In that case, if we parse the dmesg logs, I think we should have an indication that something went wrong.
I had a case where my dev board was not properly plugged-in, and before this patch, I didn't notice it because of the silent abort of the probe function.
>
> > Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
> > ---
> > drivers/rtc/rtc-pcf2127.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
> > index 3d1f57e54372..823abe2a7147 100644
> > --- a/drivers/rtc/rtc-pcf2127.c
> > +++ b/drivers/rtc/rtc-pcf2127.c
> > @@ -717,8 +717,10 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap,
> > if (!(val & PCF2127_BIT_CLKOUT_OTPR)) {
> > ret = regmap_set_bits(pcf2127->regmap, PCF2127_REG_CLKOUT,
> > PCF2127_BIT_CLKOUT_OTPR);
> > - if (ret < 0)
> > + if (ret < 0) {
> > + dev_err(dev, "writing to CLKOUT register failed\n");
> > return ret;
> > + }
> >
> > msleep(100);
> > }
> > --
> > 2.30.2
> >
>
> --
> Alexandre Belloni, co-owner and COO, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
>
--
Hugo Villeneuve <hugo@xxxxxxxxxxx>
