linux-kernel - Re: [PATCH v3 1/7] pinctrl: dt-bindings: Add documentation for Armada 37xx pin controllers

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Date:   Thu, 30 Mar 2017 18:18:08 +0200
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Nadav Haklai <nadavh@...vell.com>,
        Victor Gu <xigu@...vell.com>, Marcin Wojtas <mw@...ihalf.com>,
        Wilson Ding <dingwei@...vell.com>,
        Hua Jing <jinghua@...vell.com>,
        Neta Zur Hershkovits <neta@...vell.com>
Subject: Re: [PATCH v3 1/7] pinctrl: dt-bindings: Add documentation for Armada 37xx pin controllers

Hi Rob,
 
 On mer., mars 29 2017, Rob Herring <robh@...nel.org> wrote:

>> +GPIO subnode:
>> +
>> +Please refer to gpio.txt in this directory for details of gpio-ranges property
>> +and the common GPIO bindings used by client devices.
>> +
>> +Required properties for gpio driver under the gpio subnode:
>
> Why does this need to be a sub node? You should probably have a 
> compatible if it is.

It is needed to be able to have a phandle associated to the gpio. Then
the other node can refer to it.

But if we can do without it I would happy to do it.


>
>> +- interrupts: List of interrupt specifier for the controllers interrupt.
>> +- gpio-controller: Marks the device node as a gpio controller.
>> +- #gpio-cells: Should be 2. The first cell is the GPIO number and the
>> +   second cell specifies GPIO flags, as defined in
>> +   <dt-bindings/gpio/gpio.h>. Only the GPIO_ACTIVE_HIGH and
>> +   GPIO_ACTIVE_LOW flags are supported.
>> +- gpio-ranges: Range of pins managed by the GPIO controller.
>> +
>> +Xtal Clock bindings for Marvell Armada 37xx SoCs
>> +------------------------------------------------
>> +
>> +see Documentation/devicetree/bindings/clock/armada3700-xtal-clock.txt
>> +
>> +
>> +Example:
>> +pinctrl_sb: pinctrl-sb@...00 {
>
> pinctrl@

OK

>
>> +	compatible = "marvell,armada3710-sb-pinctrl", "syscon", "simple-mfd";
>> +	reg = <0x18800 0x100>, <0x18C00 0x20>;
>> +	gpiosb: gpiosb {
>
> gpio@

There is no reg property so we don't use the @

Thanks,

Gregory

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com