linux-kernel - Re: [PATCH v1 05/13] iio: chemical: bme680: refactorize set

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Message-ID: <Zwj3tFd549K6ahbY@smile.fi.intel.com>
Date: Fri, 11 Oct 2024 13:02:28 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: vamoirid <vassilisamir@...il.com>
Cc: jic23@...nel.org, lars@...afoo.de, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, anshulusr@...il.com, gustavograzs@...il.com,
	linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 05/13] iio: chemical: bme680: refactorize set_mode()
 mode

On Thu, Oct 10, 2024 at 11:00:22PM +0200, vamoirid wrote:
> From: Vasileios Amoiridis <vassilisamir@...il.com>
> 
> Refactorize the set_mode() function to use an external enum that
> describes the possible modes of the BME680 device instead of using
> true/false variables for selecting SLEEPING/FORCED mode.

...

> -	if (mode) {
> -		ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS,
> -					BME680_MODE_MASK, BME680_MODE_FORCED);
> -		if (ret < 0)
> -			dev_err(dev, "failed to set forced mode\n");
> -
> -	} else {
> -		ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS,
> -					BME680_MODE_MASK, BME680_MODE_SLEEP);
> -		if (ret < 0)
> -			dev_err(dev, "failed to set sleep mode\n");
> -
> +	switch (mode) {
> +	case BME680_SLEEP:
> +	case BME680_FORCED:
> +		break;
> +	default:
> +		return -EINVAL;
>  	}
>  
> +	ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS,
> +				BME680_MODE_MASK, mode);
> +	if (ret < 0)
> +		dev_err(dev, "failed to set ctrl_meas register\n");

This is an information loss. You shuld probably still have a value of mode to
be printed.

-- 
With Best Regards,
Andy Shevchenko