lkml.org 
[lkml]   [2021]   [Dec]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 2/2] i2c: tegra: Add SMBus block read and SMBus alert functions
On Thu, Dec 9, 2021 at 5:30 PM Dmitry Osipenko <digetx@gmail.com> wrote:
> 09.12.2021 18:05, Akhil R пишет:
> > +static int tegra_i2c_setup_smbalert(struct tegra_i2c_dev *i2c_dev)
> > +{
> > + struct tegra_i2c_smbalert *smbalert = &i2c_dev->smbalert;
> > + struct gpio_desc *alert_gpiod;
> > + struct i2c_client *ara;
> > +
> > + alert_gpiod = devm_gpiod_get(i2c_dev->dev, "smbalert", GPIOD_IN);
> > + if (IS_ERR(alert_gpiod))
> > + return PTR_ERR(alert_gpiod);
> > +
> > + smbalert->alert_data.irq = gpiod_to_irq(alert_gpiod);
> > + if (smbalert->alert_data.irq <= 0)
> > + return smbalert->alert_data.irq;
>
> 0 is the error condition.

I'm not sure what you implied here. gpiod_to_irq() returns 0 if and
only if it goes to the architectures where it might be possible to
have valid vIRQ 0, but this is not the case (at least I never heard of
a such) for GPIO controllers on such platforms. So, looking at the
above code I may tell that the '=' part is redundant.

--
With Best Regards,
Andy Shevchenko

\
 
 \ /
  Last update: 2021-12-09 16:39    [W:0.120 / U:3.700 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site