linux-kernel - Re: [PATCH] extcon: Introduce EXTCON_PROP_USB

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Message-id: <57B50352.7050800@samsung.com>
Date:	Thu, 18 Aug 2016 09:37:38 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Guenter Roeck <groeck@...gle.com>
Cc:	Guenter Roeck <linux@...ck-us.net>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Guenter Roeck <groeck@...omium.org>,
	Chris Zhong <zyw@...k-chips.com>,
	"cpgs (cpgs@...sung.com)" <cpgs@...sung.com>
Subject: Re: [PATCH] extcon: Introduce EXTCON_PROP_USB_SUPERSPEED property

Hi Guenter,

How about changing the property name for SuperSpeed as following?
It is more simple and reduce the length of property name.
- EXTCON_PROP_USB_SUPERSPEED -> EXTCON_PROP_USB_SS

Regards,
Chanwoo Choi

On 2016년 08월 16일 10:41, Guenter Roeck wrote:
> On Mon, Aug 15, 2016 at 5:55 PM, Chanwoo Choi <cw00.choi@...sung.com> wrote:
>> Hi Guenter,
>>
>> Looks good to me.
>> I'll add the reference[1] information on patch description and applied it.
>> [1] https://en.wikipedia.org/wiki/USB#Overview
>>
> 
> Thanks!
> 
> Guenter
> 
>> Thanks,
>> Chanwoo Choi
>>
>> On 2016년 08월 15일 22:15, Guenter Roeck wrote:
>>> From: Guenter Roeck <groeck@...omium.org>
>>>
>>> EXTCON_PROP_USB_SUPERSPEED is necessary to distinguish between USB/USB2
>>> and USB3 connections on USB Type-C cables.
>>>
>>> Cc: Chris Zhong <zyw@...k-chips.com>
>>> Signed-off-by: Guenter Roeck <groeck@...omium.org>
>>> ---
>>> Applies on top of extcon-next.
>>>
>>>  include/linux/extcon.h | 8 +++++++-
>>>  1 file changed, 7 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/include/linux/extcon.h b/include/linux/extcon.h
>>> index ad7a1606a7f3..38d2c0dec2c1 100644
>>> --- a/include/linux/extcon.h
>>> +++ b/include/linux/extcon.h
>>> @@ -107,12 +107,18 @@
>>>   * @type:    integer (intval)
>>>   * @value:   0 (normal) or 1 (flip)
>>>   * @default: 0 (normal)
>>> + * - EXTCON_PROP_USB_SUPERSPEED
>>> + * @type:       integer (intval)
>>> + * @value:      0 (USB/USB2) or 1 (USB3)
>>> + * @default:    0 (USB/USB2)
>>> + *
>>>   */
>>>  #define EXTCON_PROP_USB_VBUS         0
>>>  #define EXTCON_PROP_USB_TYPEC_POLARITY       1
>>> +#define EXTCON_PROP_USB_SUPERSPEED   2
>>>
>>>  #define EXTCON_PROP_USB_MIN          0
>>> -#define EXTCON_PROP_USB_MAX          1
>>> +#define EXTCON_PROP_USB_MAX          2
>>>  #define EXTCON_PROP_USB_CNT  (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
>>>
>>>  /* Properties of EXTCON_TYPE_CHG. */
>>>
>>
> 
> 
>