linux-kernel - Re: [PATCH 5/7] MIPS: mscc: ocelot: add GPIO4 pinmuxing DT node

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Message-ID: <20181001090227.mmcnstxcdfocx3zd@qschulz>
Date:   Mon, 1 Oct 2018 11:02:27 +0200
From:   Quentin Schulz <quentin.schulz@...tlin.com>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     ralf@...ux-mips.org, paul.burton@...s.com, jhogan@...nel.org,
        robh+dt@...nel.org, mark.rutland@....com, davem@...emloft.net,
        andrew@...n.ch, f.fainelli@...il.com, allan.nielsen@...rochip.com,
        linux-mips@...ux-mips.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        thomas.petazzoni@...tlin.com, antoine.tenart@...tlin.com
Subject: Re: [PATCH 5/7] MIPS: mscc: ocelot: add GPIO4 pinmuxing DT node

Hi Alexandre,

On Fri, Sep 14, 2018 at 08:02:22PM +0200, Alexandre Belloni wrote:
> On 14/09/2018 18:26:38+0200, Quentin Schulz wrote:
> > Hi Alexandre,
> > 
> > On Fri, Sep 14, 2018 at 04:54:46PM +0200, Alexandre Belloni wrote:
> > > Hi,
> > > 
> > > On 14/09/2018 11:44:26+0200, Quentin Schulz wrote:
> > > > In order to use GPIO4 as a GPIO, we need to mux it in this mode so let's
> > > > declare a new pinctrl DT node for it.
> > > > 
> > > > Signed-off-by: Quentin Schulz <quentin.schulz@...tlin.com>
> > > > ---
> > > >  arch/mips/boot/dts/mscc/ocelot.dtsi | 5 +++++
> > > >  1 file changed, 5 insertions(+)
> > > > 
> > > > diff --git a/arch/mips/boot/dts/mscc/ocelot.dtsi b/arch/mips/boot/dts/mscc/ocelot.dtsi
> > > > index 8ce317c..b5c4c74 100644
> > > > --- a/arch/mips/boot/dts/mscc/ocelot.dtsi
> > > > +++ b/arch/mips/boot/dts/mscc/ocelot.dtsi
> > > > @@ -182,6 +182,11 @@
> > > >  			interrupts = <13>;
> > > >  			#interrupt-cells = <2>;
> > > >  
> > > > +			gpio4: gpio4 {
> > > > +				pins = "GPIO_4";
> > > > +				function = "gpio";
> > > > +			};
> > > > +
> > > 
> > > For a GPIO, I would do that in the board dts because it is not used
> > > directly in the dtsi.
> > > 
> > 
> > And the day we've two boards using this pinctrl we move it to a dtsi. Is
> > that the plan?
> > 
> 
> Not really, at least not for gpios. I've included the pinctrl for the
> uart, i2c and spi because they are the only option if you are to use
> those peripherals. Else, I've would have left the pinctrl to the board
> file. From my point of view, the gpios are too board specific to be in a
> soc dtsi.
> 

Understood, will move it to the board file.

Thanks,
Quentin

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