linux-kernel - Re: [PATCH v4 1/6] mfd: rtsx: add func to split u32 into register

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Date:	Mon, 8 Dec 2014 09:59:04 +0000
From:	敬锐 <micky_ching@...lsil.com.cn>
To:	Lee Jones <lee.jones@...aro.org>
CC:	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"chris@...ntf.net" <chris@...ntf.net>,
	"ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"dan.carpenter@...cle.com" <dan.carpenter@...cle.com>,
	"rogerable@...ltek.com" <rogerable@...ltek.com>,
	王炜 <wei_wang@...lsil.com.cn>
Subject: Re: [PATCH v4 1/6] mfd: rtsx: add func to split u32 into register


On 12/08/2014 05:57 PM, Lee Jones wrote:
> On Mon, 08 Dec 2014, 敬锐 wrote:
>
>> On 12/08/2014 04:49 PM, Lee Jones wrote:
>>>> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
>>>>> index 74346d5..9234449 100644
>>>>> --- a/include/linux/mfd/rtsx_pci.h
>>>>> +++ b/include/linux/mfd/rtsx_pci.h
>>>>> @@ -558,6 +558,7 @@
>>>>>   #define SD_SAMPLE_POINT_CTL		0xFDA7
>>>>>   #define SD_PUSH_POINT_CTL		0xFDA8
>>>>>   #define SD_CMD0				0xFDA9
>>>>> +#define   SD_CMD_START			0x40
>>> This is a different format at the others in the group on two counts;
>>> firstly you have 3 whitespace characters after the #define and
>>> secondly all of the other hex digits in the set are 4 a breast.
>>> Please add the leading zeros to conform to this format.
>>>
>> Hi lee,
>>
>> This format is more readable, add 2 space means this value is
>> in groups under register SD_CMD0, and each register value is u8 type,
>> so use 2 hex digits is right.
>>
>> The original file make register address and its related value separated,
>> and group register together.
>>
>> But I like to write register address and value together,
>> add 2 space for value to indicate this value is related to above register.
>>
>> If we add new address/value, I recommend write register define format as
>> below:
>>
>> #define REGISTER        addr
>> #define   REG_VAL1      val1
>> #define   REG_VAL2      val2
> Okay, I see that there are other occurrences using this format in that
> file.  Please consider converting the entire file into this format.  I
> don't mind it either way, but it looks odd if they are mixed.
>
we will reformat it in the near future.

regards.