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

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Date:	Mon, 15 Aug 2016 18:41:36 -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>
Subject: Re: [PATCH] extcon: Introduce EXTCON_PROP_USB_SUPERSPEED property

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. */
>>
>