linux-kernel - Re: [PATCHv3 4/4] hwmon: da9052: add support for TSI channel

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Message-ID: <20170629224457.GA4360@roeck-us.net>
Date:   Thu, 29 Jun 2017 15:44:57 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Sebastian Reichel <sebastian.reichel@...labora.co.uk>,
        Sebastian Reichel <sre@...nel.org>,
        Support Opensource <support.opensource@...semi.com>,
        Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jean Delvare <jdelvare@...e.com>, devicetree@...r.kernel.org,
        linux-hwmon@...r.kernel.org, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 4/4] hwmon: da9052: add support for TSI channel

On Thu, Jun 29, 2017 at 11:45:21AM -0700, Dmitry Torokhov wrote:
> Hi Sebastian,
> 
> On Thu, Jun 29, 2017 at 02:43:46PM +0200, Sebastian Reichel wrote:
> > @@ -238,6 +239,14 @@ static int da9052_ts_probe(struct platform_device *pdev)
> >  	if (!da9052)
> >  		return -EINVAL;
> >  
> > +	/*
> > +	 * Check if touchscreen pins are used are analogue input instead
> > +	 * of having a touchscreen connected to them. The analogue input
> > +	 * functionality will be provided by hwmon driver (if enabled).
> > +	 */
> > +	if (device_property_read_bool(pdev->dev.parent, "dlg,tsi-as-adc"))
> > +		return -ENODEV;
> > +
> 
> I believe this is not the right way of doing this. da9052-core should
> simply forgo creating da9052-tsi platform device when this property is
> present.
> 
Agreed.

Guenter