linux-kernel - Re: [PATCH V2 1/1] usb:serial:f81534 Add F81532/534 Driver

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Message-ID: <558BC7FD.100@gmail.com>
Date:	Thu, 25 Jun 2015 17:21:01 +0800
From:	Peter Hung <hpeter@...il.com>
To:	Johan Hovold <johan@...nel.org>
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, peter_hong@...tek.com.tw,
	tom_tsai@...tek.com.tw, Peter Hung <hpeter+linux_kernel@...il.com>
Subject: Re: [PATCH V2 1/1] usb:serial:f81534 Add F81532/534 Driver

Hi Johan,

Johan Hovold 於 2015/6/25 下午 04:06 寫道:
>   - As Greg already mentioned, you need to implement gpio support using
>     gpiolib, not a custom sysfs interface
>
> I don't have time to look closer at the architectural bits until next
> week I'm afraid, but perhaps you could start with the above.

Thanks for your advices, I'll try to improve it again.
But I had something need to clarify.

1. The sysfs interface of the driver provide "limited output pin"
    control. only support output 0/1, not support input mode.
    Should I implement it as gpiolib?

2. If it still recommends to implement with gpiolib, Could I implement
    it and preserve the sysfs interface for legacy?

-- 
With Best Regards,
Peter Hung
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