linux-kernel - Re: [PATCH v3 3/3] power: supply: add CellWise cw2015 fuel gauge driver

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Date:   Thu, 12 Mar 2020 00:51:28 +0100
From:   Tobias Schramm <t.schramm@...jaro.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Tobias Schramm <t.schramm@...jaro.org>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Heiko Stuebner <heiko.stuebner@...obroma-systems.com>,
        Stephan Gerhold <stephan@...hold.net>,
        Mark Brown <broonie@...nel.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] power: supply: add CellWise cw2015 fuel gauge
 driver

Hi Andy,

thanks for reviewing again.

>> +	/* wait for gauge to become ready */
>> +	for (i = 0; i < CW2015_READ_TRIES; i++) {
>> +		ret = regmap_read(cw_bat->regmap, CW2015_REG_SOC, &reg_val);
>> +		if (ret)
>> +			return ret;
>> +		/* SoC must not be more than 100% */
>> +		else if (reg_val <= 100)
>> +			break;
>> +
>> +		msleep(100);
>> +	}
> 
> Have you considered to use regmap_read_poll_timeout()?

Neat! That is a much cleaner solution. Will use that in v4.

> 
>> +
>> +	if (i >= CW2015_READ_TRIES) {
>> +		reg_val = CW2015_MODE_SLEEP;
>> +		regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val);
>> +		dev_err(cw_bat->dev,
>> +			"Gauge did not become ready after profile upload");
>> +		return -ETIMEDOUT;
>> +	}
> 
> ...
> 
>> +		if (memcmp(bat_info, cw_bat->bat_profile,
>> +				CW2015_SIZE_BATINFO)) {
> 
> I think it's pretty much okay to have this on one line, disregard 80 limit
> (it's only 1 extra).

Ok, will probably do that in a few places.


Best Regards,

Tobias