RE: [PATCH V2 4/8] gpio: vf610: add optional clock support

["A.s. Dong" <aisheng.dong@xxxxxxx>]

> -----Original Message-----
> From: Uwe Kleine-König [mailto:u.kleine-koenig@xxxxxxxxxxxxxx]
> Sent: Tuesday, October 23, 2018 8:42 PM
> To: A.s. Dong <aisheng.dong@xxxxxxx>
> Cc: Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx>; dongas86@xxxxxxxxx;
> Linus Walleij <linus.walleij@xxxxxxxxxx>; Stefan Agner <stefan@xxxxxxxx>;
> linux-gpio@xxxxxxxxxxxxxxx; robh+dt@xxxxxxxxxx; dl-linux-imx
> <linux-imx@xxxxxxx>; kernel@xxxxxxxxxxxxxx; Fabio Estevam
> <fabio.estevam@xxxxxxx>; shawnguo@xxxxxxxxxx;
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [PATCH V2 4/8] gpio: vf610: add optional clock support
> 
> On Tue, Oct 23, 2018 at 12:23:12PM +0000, A.s. Dong wrote:
> > Hi Russell,
> >
> > > -----Original Message-----
> > > From: Russell King - ARM Linux [mailto:linux@xxxxxxxxxxxxxxx]
> > > Sent: Tuesday, October 23, 2018 8:04 PM
> > [...]
> > > On Tue, Oct 23, 2018 at 11:49:17AM +0000, A.s. Dong wrote:
> > > > +	clk_gpio = devm_clk_get(&pdev->dev, "gpio");
> > > > +	clk_port = devm_clk_get(&pdev->dev, "port");
> > > > +	if ((PTR_ERR(clk_gpio) == -EPROBE_DEFER) ||
> > > > +	    (PTR_ERR(clk_port) == -EPROBE_DEFER)) {
> > >
> > > 	if (clk_gpio == ERR_PTR(-EPROBE_DEFER) ||
> > > 	    clk_port == ERR_PTR(-EPROBE_DEFER)) {
> > >
> >
> > Thanks for the suggestion. I will update it in next series.
> > Before that, let's wait a moment to see if any more review comments.
> >
> > BTW, as I see kernel currently is widely using PTR_ERR(ptr) to compare
> > -EPROBE_DEFER, I'm not quite get the point why the new approach you
> > suggested is better, is it less error-prone? Or something else?
> > would you please help clarify a bit more?
> 
> See the discussion in
> https://lore.kernel.org/patchwork/patch/999602/ 
>

Thanks for sharing the info.
It does help.

Regards
Dong Aisheng
 
> Best regards
> Uwe
> 
> --
> Pengutronix e.K.                           | Uwe Kleine-König
> |
> Industrial Linux Solutions                 |
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