linux-kernel - Re: [PATCH v2 07/18] drivers: reset: Add STM32 reset driver

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Message-ID: <CALszF6D3XMkjkMTdS-1xnVMFzgAW53NNOKOsfztsCboTdsBaaw@mail.gmail.com>
Date:	Tue, 10 Mar 2015 16:44:24 +0100
From:	Maxime Coquelin <mcoquelin.stm32@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Andreas Färber <afaerber@...e.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Rob Herring <robh+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Jonathan Corbet <corbet@....net>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
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Subject: Re: [PATCH v2 07/18] drivers: reset: Add STM32 reset driver

2015-03-10 16:02 GMT+01:00 Arnd Bergmann <arnd@...db.de>:
> On Friday 20 February 2015 19:01:06 Maxime Coquelin wrote:
>> +/* AHB1 */
>> +#define GPIOA_RESET    0
>> +#define GPIOB_RESET    1
>> +#define GPIOC_RESET    2
>> +#define GPIOD_RESET    3
>> +#define GPIOE_RESET    4
>> +#define GPIOF_RESET    5
>> +#define GPIOG_RESET    6
>> +#define GPIOH_RESET    7
>> +#define GPIOI_RESET    8
>> +#define GPIOJ_RESET    9
>> +#define GPIOK_RESET    10
>>
>
> As these are just the hardware numbers, it's better to not make them
> part of the binding at all. Instead, just document in the binding that
> one is supposed to pass the hardware number as the argument.

The reset controller is part of the RCC (Reset & Clock Controller) IP.
In this version, I only provided the reset registers to the reset
controller driver, but as per Andreas Färber remark, I should avec a
single DT node for both the resets and clocks.

In the next version I am preparing, the defines doesn't look as
trivial as in this version, GPIOA_RESET being 128 for instance.

Is it fine for you if I keep the defines part of the binding?

Br,
Maxime
>
>         Arnd
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