linux-kernel - Re: [PATCH v4] scsi: ufs: add support of generic PHY and ICE in Qualcomm chips

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Message-ID: <ed67f4786374535ed10d119860e76b15.squirrel@www.codeaurora.org>
Date:	Thu, 25 Dec 2014 16:40:38 -0000
From:	ygardi@...eaurora.org
To:	"Kishon Vijay Abraham I" <kishon@...com>
Cc:	"Christoph Hellwig" <hch@...radead.org>,
	"Yaniv Gardi" <ygardi@...eaurora.org>,
	james.bottomley@...senpartnership.com,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, santoshsy@...il.com,
	linux-scsi-owner@...r.kernel.org, subhashj@...eaurora.org,
	noag@...eaurora.org, draviv@...eaurora.org,
	"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>,
	"Vinayak Holikatti" <vinholikatti@...il.com>,
	"James E.J. Bottomley" <jbottomley@...allels.com>,
	"Grant Likely" <grant.likely@...aro.org>,
	"Christoph Hellwig" <hch@....de>,
	"Sujit Reddy Thumma" <sthumma@...eaurora.org>,
	"Raviv Shvili" <rshvili@...eaurora.org>,
	"Sahitya Tummala" <stummala@...eaurora.org>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4] scsi: ufs: add support of generic PHY and ICE in
 Qualcomm chips

thanks for inputs.
shortly I will upload a new version, where I address you comments

thanks,
Yaniv


>
> On Thursday 04 December 2014 09:24 PM, Christoph Hellwig wrote:
>> On Thu, Nov 27, 2014 at 05:59:58PM +0200, Yaniv Gardi wrote:
>>> In this change we add support to the generic PHY framework.
>>> Two UFS phys are implemented:
>>> qmp-20nm and qmp-28nm.
>>>
>>> Also, the files in this change implement the UFS HW (controller & PHY)
>>> specific behavior in Qualcomm chips.
>>> Relocation of a few header files is needed in order to expose routines
>>> and data structures between PHY driver and UFS driver.
>>>
>>> Also, this change include the implementation of Inline Crypto Engine
>>> (ICE)
>>> in Qualcomm chips.
>>
>> This whole patch is a mess.  It does way to many things in one patch,
>> and it doesn't explain enough of it.
>>
>> Please explain why you need it.  Especially as the PHY API is a generic
>> phy abstraction, so having to share defintions between the provider and
>> consumer seems wrong.  Even if you need some shared bits keep them to an
>> absolute minium insted of moving so much out of the driver directory.
>> Also if at all possible keep the shared data in a single header under
>> include/linux instead of having lots of global headers in a deep
>> directory structure.
>>
>> Second split this into patches that do a single things, and explain why
>> you're doing each:
>>
>>  1) header move if/as needed
>>  2) add 20nm phy driver
>>  3) add 28nm phy driver
>>  4) add ufs-qcom driver
>>  5) add ufs-qcom-ice support
>>
>> and so on.
>
> +1
>
> -Kishon
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