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

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Date:	Wed, 17 Aug 2016 17:41:10 -0700
From:	Guenter Roeck <groeck@...gle.com>
To:	Chanwoo Choi <cw00.choi@...sung.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

On Wed, Aug 17, 2016 at 5:37 PM, Chanwoo Choi <cw00.choi@...sung.com> wrote:
> 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
>
Whatever you prefer is fine.

Thanks,
Guenter

> 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. */
>>>>
>>>
>>
>>
>>
>