linux-kernel - Re: [PATCH v5] extcon: add Maxim MAX3355 driver

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Message-ID: <5678552E.3010709@cogentembedded.com>
Date:	Mon, 21 Dec 2015 22:38:22 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-sh@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v5] extcon: add Maxim MAX3355 driver

Hello.

On 12/21/2015 02:01 PM, Sergei Shtylyov wrote:

>>>> This patch depend on GPIOLIB configuration as following:
>>>> I modified it with following diff and applied it.
>>>>
>>>> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
>>>> index ba4db7d..3d89e60 100644
>>>> --- a/drivers/extcon/Kconfig
>>>> +++ b/drivers/extcon/Kconfig
>>>> @@ -54,6 +54,7 @@ config EXTCON_MAX14577
>>>>
>>>>    config EXTCON_MAX3355
>>>>           tristate "Maxim MAX3355 USB OTG EXTCON Support"
>>>> +       depends on GPIOLIB || COMPILE_TEST
>>>
>>>     If it won't compile w/o gpiolib, what's the use of COMIPLE_TEST?
>>>     And no, it shouldn't depend on gpiolib. It has empty stubs for the case
>>> of CONFIG_GPIOLIB=n. Obviously something is wrong with the GPIO headers,
>>> I'll look into it.
>>
>> Yes. When GPIOLIB is disabled, the build issue don't happen.
>
>     What? It surely does happen!
>
>> because include/linux/gpio/consumer.h implement the dummy function
>> for all gpio functions if CONFIG_GPIOLIB is disabled.
>
>     Linus W. advised to #include this header explicitly -- I'll try and post.

    I see you already #include'd it, thanks. But in that case, <linux/gpio.h> 
doesn't seem necessary.

>> Thanks,
>> Chanwoo Choi

MBR, Sergei

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