linux-kernel - Re: [PATCH 01/12] mtd: nand: davinci: store the core chipselect number in platform data

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Date:   Tue, 1 May 2018 16:09:12 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Kevin Hilman <khilman@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-mtd@...ts.infradead.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 01/12] mtd: nand: davinci: store the core chipselect
 number in platform data

On Tuesday 01 May 2018 03:59 PM, Sekhar Nori wrote:
> On Tuesday 01 May 2018 03:23 PM, Sekhar Nori wrote:
>> On Tuesday 01 May 2018 02:55 PM, Sekhar Nori wrote:
>>> On Monday 30 April 2018 01:54 PM, Bartosz Golaszewski wrote:
>>>> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>>>>
>>>> We have the 'ti,davinci-chipselect' property in the device tree, but
>>>> when using platform data the driver silently uses the id field of
>>>> struct platform_device as the chipselect. This is confusing and we
>>>> almost broke the nand support again recently after converting the
>>>> platform to common clock framework (which changed the device id in the
>>>> clock lookup - the problem is gone now that we no longer acquire the
>>>> clock in the nand driver.
>>>>
>>>> This patch adds a new filed - core_chipsel - to the platform_data.
>>>
>>> s/filed/field
>>>
>>>> Subsequent patches will convert the platforms to using this new field.
>>>
>>> Can you add a comment for this new field too, like how we have for most
>>> other fields?
>>>
>>> Curious on what 'core' in core_chipsel means. Something to do with
>>> chip-select offset we have on DA850?
>>
>> Looks like you may have just picked the terminology from DaVinci NAND
>> driver (introduced back in 2009). But in this context, it means the
>> 0-indexed chip-select number that of the asynchronous memory interface
>> to which the NAND device is connected.
>>
>> So, may be a comment here will suffice.
> 
> This is what I committed:
> 
> --8<--
> commit 533d93703fa717fdf74c4fb711c868c4fdc8b475 (HEAD -> refs/heads/v4.18/nand-cs-simplification)
> Author:     Bartosz Golaszewski <bgolaszewski@...libre.com>
> AuthorDate: Mon Apr 30 10:24:42 2018 +0200
> Commit:     Sekhar Nori <nsekhar@...com>
> CommitDate: Tue May 1 15:57:47 2018 +0530
> 
>     mtd: nand: davinci: store the core chipselect number in platform data

Missed the rawnand prefix here. Sigh. Here is the fixed headline.

mtd: rawnand: davinci: store the core chipselect number in platform data

Thanks,
Sekhar