linux-kernel - Re: [PATCH v3 3/6] iio: pressure: add SCALE and RAW values for channels

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Message-ID: <ZfIGtUPZpyDBnWwz@smile.fi.intel.com>
Date: Wed, 13 Mar 2024 22:04:05 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Vasileios Amoiridis <vassilisamir@...il.com>
Cc: jic23@...nel.org, lars@...afoo.de, ang.iglesiasg@...il.com,
	mazziesaccount@...il.com, ak@...klinger.de,
	petre.rodan@...dimension.ro, linus.walleij@...aro.org,
	phil@...pberrypi.com, 579lpy@...il.com, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/6] iio: pressure: add SCALE and RAW values for
 channels

On Wed, Mar 13, 2024 at 08:51:10PM +0100, Vasileios Amoiridis wrote:
> On Wed, Mar 13, 2024 at 09:03:08PM +0200, Andy Shevchenko wrote:
> > On Wed, Mar 13, 2024 at 06:40:04PM +0100, Vasileios Amoiridis wrote:
> > > Add extra IIO_CHAN_INFO_SCALE and IIO_CHAN_INFO_RAW in order to be
> > > able to calculate the processed value with standard userspace IIO
> > > tools. Can be used for triggered buffers as well.

..

> > > +	case IIO_CHAN_INFO_RAW:
> > > +		switch (chan->type) {
> > > +		case IIO_HUMIDITYRELATIVE:
> > > +			*val = data->chip_info->read_humid(data);
> > > +			ret = IIO_VAL_INT;
> > > +			break;
> > > +		case IIO_PRESSURE:
> > > +			*val = data->chip_info->read_press(data);
> > > +			ret = IIO_VAL_INT;
> > > +			break;
> > > +		case IIO_TEMP:
> > > +			*val = data->chip_info->read_temp(data);
> > > +			ret = IIO_VAL_INT;
> > > +			break;
> > > +		default:
> > > +			ret = -EINVAL;
> > > +			break;
> > 
> > Is it mutex that prevents us from returning here?
> > If so, perhaps switching to use cleanup.h first?
> 
> I haven't seen cleanup.h used in any file and now that I searched,
> only 5-6 are including it.

Hmm... Which repository you are checking with?

$ git grep -lw cleanup.h -- drivers/ | wc -l
47

(Today's Linux Next)

> I am currently thinking if the mutex
> that already exists is really needed since most of the drivers
> don't have it + I feel like this is something that should be done
> by IIO, thus maybe it's not even needed here.

> > > +		}
> > > +		break;

-- 
With Best Regards,
Andy Shevchenko