linux-kernel - Re: [PATCH] IIO: Adds ACPI support for ST gyroscopes

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Message-ID: <CACRpkdawMLA=ROND=hp-_J6Ye=By5YYqwgBc0TYViUUpWj8X6w@mail.gmail.com>
Date:	Tue, 24 Mar 2015 11:44:36 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Robert Dolca <robert.dolca@...el.com>
Cc:	"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
	Jonathan Cameron <jic23@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Denis CIOCCA <denis.ciocca@...com>
Subject: Re: [PATCH] IIO: Adds ACPI support for ST gyroscopes

On Mon, Mar 23, 2015 at 2:40 PM, Robert Dolca <robert.dolca@...el.com> wrote:

Oh more comments still...

> +       /* Get IRQ GPIO */
> +       gpiod_irq = devm_gpiod_get_index(&client->dev, 0, 0);
> +       if (IS_ERR(gpiod_irq))
> +               return -ENODEV;

Shouldn't that be devm_gpiod_get_index_optional()?

I think the driver is useable also without that GPIO/IRQ
and should not error out. (Will cause bugs in other
platforms!)

Also: maybe the GPIO/IRQ support should be in a separate
patch so as not to confuse with the ACPI stuff.

Yours,
Linus Walleij
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