linux-kernel - Re: [PATCH v2 2/2] usb: musb: pic32: Add USB DRC driver for PIC32 OTG controller.

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Date:	Fri, 08 Apr 2016 08:38:20 +0300
From:	Felipe Balbi <felipe.balbi@...ux.intel.com>
To:	Purna Chandra Mandal <purna.mandal@...rochip.com>,
	linux-kernel@...r.kernel.org
Cc:	Rob Herring <robh+dt@...nel.org>, linux-usb@...r.kernel.org,
	Joshua Henderson <digitalpeer@...italpeer.com>,
	Cristian Birsan <cristian.birsan@...rochip.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Bin Liu <b-liu@...com>, Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v2 2/2] usb: musb: pic32: Add USB DRC driver for PIC32 OTG controller.


Hi,

Purna Chandra Mandal <purna.mandal@...rochip.com> writes:
>> Purna Chandra Mandal <purna.mandal@...rochip.com> writes:
>>> From: Cristian Birsan <cristian.birsan@...rochip.com>
>>>
>>> This driver adds support of PIC32 MUSB OTG controller as
>>> dual role device. It implements platform specific glue to
>>> reuse musb core.
>>>
>>> Signed-off-by: Cristian Birsan <cristian.birsan@...rochip.com>
>>> Signed-off-by: Purna Chandra Mandal <purna.mandal@...rochip.com>
>>>
>>> In-reply-to: 460027775-20729-2-git-send-email-purna.mandal@...rochip.com
>>>
>>> ---
>>>
>>> Changes in v2:
>>>  - fix i386 build
>>>  - fix indentation
>>>
>>>  drivers/usb/musb/Kconfig  |   9 +-
>>>  drivers/usb/musb/Makefile |   1 +
>>>  drivers/usb/musb/pic32.c  | 608 ++++++++++++++++++++++++++++++++++++++++++++++
>>>  3 files changed, 617 insertions(+), 1 deletion(-)
>>>  create mode 100644 drivers/usb/musb/pic32.c
>>>
>>> diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
>>> index 886526b..1970c1e 100644
>>> --- a/drivers/usb/musb/Kconfig
>>> +++ b/drivers/usb/musb/Kconfig
>>> @@ -112,6 +112,13 @@ config USB_MUSB_BLACKFIN
>>>  	depends on (BF54x && !BF544) || (BF52x && ! BF522 && !BF523)
>>>  	depends on NOP_USB_XCEIV
>>>  
>>> +config USB_MUSB_PIC32
>>> +	tristate "Microchip PIC32 USB platforms"
>>> +	depends on MACH_PIC32
>> no, we like to build stuff on other arches, this should be:
>>
>> 	depends on MACH_PIC32 || COMPILE_TEST
>>
>> and you should *really* fix the build error, not work around it.
>
> This driver is for PIC32MZDA platforms which are powered by MIPS 14Kec CPU.
>
> The offending API 'readsl()' is implemented by MIPS arch (in
> arch/mips/include/asm/io.h), but not by i386 arch.

odd, asm-generic/io.h has an implementation. In any case, why couldn't
you use readl() instead ?

> IMO compiling for i386 is not required.

it is for build coverage.

-- 
balbi

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