linux-kernel - Re: [PATCH 04/11] net: phylink: switch to using fwnode_gpiod_get

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Message-ID: <20190911095149.GA108334@dtor-ws>
Date:   Wed, 11 Sep 2019 02:51:49 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Linus Walleij <linus.walleij@...aro.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH 04/11] net: phylink: switch to using
 fwnode_gpiod_get_index()

On Wed, Sep 11, 2019 at 12:46:19PM +0300, Andy Shevchenko wrote:
> On Wed, Sep 11, 2019 at 10:39:14AM +0100, Russell King - ARM Linux admin wrote:
> > On Wed, Sep 11, 2019 at 12:25:14PM +0300, Andy Shevchenko wrote:
> > > On Wed, Sep 11, 2019 at 12:52:08AM -0700, Dmitry Torokhov wrote:
> > > > Instead of fwnode_get_named_gpiod() that I plan to hide away, let's use
> > > > the new fwnode_gpiod_get_index() that mimics gpiod_get_index(), bit
> > > > works with arbitrary firmware node.
> > > 
> > > I'm wondering if it's possible to step forward and replace
> > > fwnode_get_gpiod_index by gpiod_get() / gpiod_get_index() here and
> > > in other cases in this series.
> > 
> > No, those require a struct device, but we have none.  There are network
> > drivers where there is a struct device for the network complex, but only
> > DT nodes for the individual network interfaces.  So no, gpiod_* really
> > doesn't work.
> 
> In the following patch the node is derived from struct device. So, I believe
> some cases can be handled differently.

If we are willing to sacrifice the custom label for the GPIO that
fwnode_gpiod_get_index() allows us to set, then there are several
drivers that could actually use gpiod_get() API.

This is up to the dirver's maintainers...

Thanks.

-- 
Dmitry