linux-kernel - Re: [PATCH v3 4/8] rtc: isl12022: add support for trip level DT binding

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Message-ID: <ZIrx6lZfsYnM7TnQ@smile.fi.intel.com>
Date:   Thu, 15 Jun 2023 14:11:38 +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 v3 4/8] rtc: isl12022: add support for trip level DT
 binding

On Thu, Jun 15, 2023 at 12:58:22PM +0200, Rasmus Villemoes wrote:
> Implement support for using the values given in the
> isil,battery-trip-levels-microvolt property to set appropriate values
> in the VB85TP/VB75TP bits in the PWR_VBAT register.

A few nit-picks below.

...

> +static void isl12022_set_trip_levels(struct device *dev)
> +{
> +	struct regmap *regmap = dev_get_drvdata(dev);
> +	u32 levels[2] = {0, 0};

A nit, 0, 0 is not needed, {} will do the job.

> +	int ret, i, j, x[2];
> +	u8 val, mask;

BUILD_BUG_ON(ARRAY_SIZE(x) != ARRAY_SIZE(levels)) ?

> +	device_property_read_u32_array(dev, "isil,battery-trip-levels-microvolt",
> +				       levels, 2);

A nit, ARRAY_SIZE(levels) ?

> +	for (i = 0; i < 2; i++) {

ARRAY_SIZE(x) ?

> +		for (j = 0; j < ARRAY_SIZE(trip_levels[i]) - 1; j++) {
> +			if (levels[i] <= trip_levels[i][j])
> +				break;
> +		}
> +		x[i] = j;
> +	}
> +
> +	val = FIELD_PREP(ISL12022_REG_VB85_MASK, x[0]) |
> +		FIELD_PREP(ISL12022_REG_VB75_MASK, x[1]);
> +	mask = ISL12022_REG_VB85_MASK | ISL12022_REG_VB75_MASK;
> +
> +	ret = regmap_update_bits(regmap, ISL12022_REG_PWR_VBAT, mask, val);
> +	if (ret)
> +		dev_warn(dev, "unable to set battery alarm levels: %d\n", ret);
> +}

-- 
With Best Regards,
Andy Shevchenko