linux-kernel - Re: [PATCH v3 1/2] gpio: add GPO driver for PCA9570

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Message-ID: <70c39afa-ee69-f867-61ae-a7e3a5c149d6@gorani.run>
Date:   Thu, 2 Jul 2020 21:18:24 +0900
From:   Sungbo Eo <mans0n@...ani.run>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Michael Walle <michael@...le.cc>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v3 1/2] gpio: add GPO driver for PCA9570

On 2020-07-01 06:30, Andy Shevchenko wrote:
> On Tue, Jun 30, 2020 at 7:08 PM Sungbo Eo <mans0n@...ani.run> wrote:
>>
>> NXP PCA9570 is 4-bit I2C GPO expander without interrupt functionality.
>> Its ports are controlled only by a data byte without register address.
>>
>> As there is no other driver similar enough to be adapted for it, a new
>> driver is introduced here.
>>
> 
> It looks good, but I would add ->get() to return buffered value.
> 

Thanks, your suggestion was indeed valuable. I reworked the driver, 
please have a look.