linux-kernel - Re: [PATCH] rtc: pcf2127: add error message if writing to CLKOUT register fails

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Message-ID: <YehMZC4vduvSH5HA@piout.net>
Date:   Wed, 19 Jan 2022 18:37:40 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Hugo Villeneuve <hugo@...ovil.com>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Hugo Villeneuve <hvilleneuve@...onoff.com>,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rtc: pcf2127: add error message if writing to CLKOUT
 register fails

On 19/01/2022 12:27:39-0500, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@...onoff.com>
> 
> 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 :)

> Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>
> ---
>  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