linux-kernel - Re: [PATCH] usb: musb: Kconfig: Depend on some machines under blackfin

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Date:	Sun, 5 Apr 2015 06:33:44 +0800
From:	Chen Gang <xili_gchen_5257@...mail.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Richard Weinberger <richard.weinberger@...il.com>
CC:	balbi@...com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH] usb: musb: Kconfig: Depend on some machines under blackfin

On 4/4/15 17:54, Greg Kroah-Hartman wrote:
> On Sat, Apr 04, 2015 at 05:51:21AM +0800, Chen Gang wrote:
>> Under blackfin, only bf527, bf548 and bf609 may use musb. The related
>> error with allmodconfig:
>>
>>     CC [M]  drivers/usb/misc/trancevibrator.o
>>   In file included from drivers/usb/musb/musb_core.h:70:0,
>>                    from drivers/usb/musb/musb_core.c:103:
>>   drivers/usb/musb/musb_core.c: In function 'musb_indexed_ep_select':
>>   drivers/usb/musb/musb_regs.h:458:32: error: 'USB_INDEX' undeclared (first use in this function)
>>    #define MUSB_INDEX  USB_OFFSET(USB_INDEX) /* 8 bit */
>>                                   ^
>>
>> Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
> 
> Why not fix the root cause and provide this symbol on blackfin?  There's
> no specific reason why it shouldn't be able to be built on this
> platform.
> 
> It's better to make platforms properly build everything, patches like
> this just make things messier and harder to maintain.
> 

I am not quite sure all machines of blackfin can support musb (according
to current code, at present, we can only sure bf527, bf548 and bf609 can
support it).

So, I suggest to add new macro HAVE_MUSB for BLACKFIN in patch v2. And
welcome any other members' idea.

Thanks.
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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