linux-kernel - Re: [PATCH 5/8] rtc: isl12022: implement RTC_VL_READ and RTC_VL

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Date:   Mon, 12 Jun 2023 18:48:49 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-rtc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/8] rtc: isl12022: implement RTC_VL_READ and RTC_VL_CLR
 ioctls

On Mon, Jun 12, 2023 at 01:30:55PM +0200, Rasmus Villemoes wrote:
> Hook up support for reading the values of the SR_LBAT85 and SR_LBAT75
> bits. Translate the former to "battery low", and the latter to
> "battery empty or not-present".

...

> +static int isl12022_read_sr(struct regmap *regmap)
> +{
> +	int ret;
> +	u32 val;
> +
> +	ret = regmap_read(regmap, ISL12022_REG_SR, &val);
> +	if (ret < 0)
> +		return ret;
> +	return val;

Wondering if the bit 31 is in use with this register (note, I haven't checked
the register width nor datasheet).

> +}

-- 
With Best Regards,
Andy Shevchenko