linux-kernel - Re: [PATCH v4 4/4] staging: greybus: arche-platform: Switch to the gpio descriptor interface

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Date:   Thu, 10 Jan 2019 23:13:43 +0530
From:   Nishad Kamdar <nishadkamdar@...il.com>
To:     Johan Hovold <johan@...nel.org>
Cc:     Johan Hovold <johan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alex Elder <elder@...nel.org>,
        Rui Miguel Silva <rmfrfs@...il.com>,
        greybus-dev@...ts.linaro.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, nishadkamdar@...il.com
Subject: Re: [PATCH v4 4/4] staging: greybus: arche-platform: Switch to the
 gpio descriptor interface

On Wed, Jan 09, 2019 at 12:35:47PM +0100, Johan Hovold wrote:
> On Sat, Dec 22, 2018 at 08:23:02PM +0530, Nishad Kamdar wrote:
> > Use the gpiod interface instead of the deprecated
> > old non-descriptor interface.
> > 
> > Signed-off-by: Nishad Kamdar <nishadkamdar@...il.com>
> > ---
> > Changes in v4:
> >  - Move 'gpio_desc *svc_sysboot' below the reset flag
> >    as it is more logical to have reset flag below
> >    reset gpio.
> >  - Remove a few unnecessary line breaks.
> > Changes in v3:
> >  - Add this patch to a patchset.
> > Changes in v2:
> >  - Move comment to the same line as to what it applies to.
> > ---
> 
> > -static inline void svc_reset_onoff(unsigned int gpio, bool onoff)
> > +static inline void svc_reset_onoff(struct gpio_desc *gpio, bool onoff)
> >  {
> > -	gpio_set_value(gpio, onoff);
> > +	gpiod_set_value(gpio, onoff);
> >  }
> 
> Please use the raw interface here too, until we've done away with the
> polarity properties and can honour the generic device tree flags. Please
> make a comment about this in the commit message too.
> 
Ok, I'll do that.
> > @@ -444,61 +438,33 @@ static int arche_platform_probe(struct platform_device *pdev)
> >  	/* setup svc reset gpio */
> >  	arche_pdata->is_reset_act_hi = of_property_read_bool(np,
> >  							     "svc,reset-active-high");
> > -	arche_pdata->svc_reset_gpio = of_get_named_gpio(np,
> > -							"svc,reset-gpio",
> > -							0);
> > -	if (!gpio_is_valid(arche_pdata->svc_reset_gpio)) {
> > -		dev_err(dev, "failed to get reset-gpio\n");
> > -		return arche_pdata->svc_reset_gpio;
> > -	}
> > -	ret = devm_gpio_request(dev, arche_pdata->svc_reset_gpio, "svc-reset");
> > -	if (ret) {
> > -		dev_err(dev, "failed to request svc-reset gpio:%d\n", ret);
> > -		return ret;
> > -	}
> > -	ret = gpio_direction_output(arche_pdata->svc_reset_gpio,
> > -				    arche_pdata->is_reset_act_hi);
> > -	if (ret) {
> > -		dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret);
> > +	if (arche_pdata->is_reset_act_hi)
> > +		flags = GPIOD_OUT_HIGH;
> > +	else
> > +		flags = GPIOD_OUT_LOW;
> > +
> > +	arche_pdata->svc_reset = devm_gpiod_get(dev, "svc,reset-gpio", flags);
> 
> Again, you cannot just rename devicetree properties like this. Keep the
> current names for now (and drop the -gpio suffix when requesting).
> 
Ok, I'll so that.
> Johan

Regards,
Nishad