linux-kernel - Re: [PATCH v1 3/6] power_supply: Add types for USB Type C and PD chargers

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Message-ID: <CAAObsKBdtQ0Je4cnU=tQKNgsGRoMJPF9gkSywu+EXH476uXudA@mail.gmail.com>
Date:	Thu, 11 Feb 2016 11:00:59 +0100
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	Benson Leung <bleung@...omium.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Sameer Nanda <snanda@...omium.org>,
	Enric Balletbò <enric.balletbo@...labora.co.uk>,
	Vic Yang <victoryang@...omium.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Randall Spangler <rspangler@...omium.org>,
	Gwendal Grignou <gwendal@...omium.org>,
	Sebastian Reichel <sre@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v1 3/6] power_supply: Add types for USB Type C and PD chargers

On 5 February 2016 at 19:38, Benson Leung <bleung@...omium.org> wrote:
> Thanks for putting this up Tomeu!

No problem, thanks for the encouragement.

> On Fri, Feb 5, 2016 at 5:32 AM, Tomeu Vizoso <tomeu.vizoso@...labora.com> wrote:
>> From: Benson Leung <bleung@...omium.org>
>>
>> This adds power supply types for USB chargers defined in
>> the USB Type-C Specification 1.1 and in the
>> USB Power Delivery Specification Revision 2.0 V1.1.
>>
>> The following are added :
>> POWER_SUPPLY_TYPE_USB_TYPE_C,   /* Type C Port */
>> POWER_SUPPLY_TYPE_USB_PD,       /* Type C Power Delivery Port */
>> POWER_SUPPLY_TYPE_USB_PD_DRP,   /* Type C PD Dual Role Port */
>
> I authored this patch, but in looking back, the comments should be tweaked.
> USB_PD and USB_PD_DRP are not necessarily Type-C ports, as you may
> have USB_PD ports that are either Type-A or Type-B as well.
>
> Could you change these to be "USB Power Delivery Port" and "USB PD
> Dual Role Port"?

I have gone with omitting the USB prefix, following the lead of the
existing entries, do you agree with that?

Thanks,

Tomeu

>> Signed-off-by: Benson Leung <bleung@...omium.org>
>> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
>> Reviewed-by: Alec Berg <alecaberg@...omium.org>
>> Reviewed-by: Vincent Palatin <vpalatin@...omium.org>
>> Reviewed-by: Todd Broch <tbroch@...omium.org>
>> ---
>>
>>  drivers/power/power_supply_sysfs.c | 3 ++-
>>  include/linux/power_supply.h       | 3 +++
>>  2 files changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
>> index ed2d7fd0c734..80fed98832f9 100644
>> --- a/drivers/power/power_supply_sysfs.c
>> +++ b/drivers/power/power_supply_sysfs.c
>> @@ -45,7 +45,8 @@ static ssize_t power_supply_show_property(struct device *dev,
>>                                           char *buf) {
>>         static char *type_text[] = {
>>                 "Unknown", "Battery", "UPS", "Mains", "USB",
>> -               "USB_DCP", "USB_CDP", "USB_ACA"
>> +               "USB_DCP", "USB_CDP", "USB_ACA", "USB_C",
>> +               "USB_PD", "USB_PD_DRP"
>>         };
>>         static char *status_text[] = {
>>                 "Unknown", "Charging", "Discharging", "Not charging", "Full"
>> diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
>> index ef9f1592185d..206c3384c6fa 100644
>> --- a/include/linux/power_supply.h
>> +++ b/include/linux/power_supply.h
>> @@ -163,6 +163,9 @@ enum power_supply_type {
>>         POWER_SUPPLY_TYPE_USB_DCP,      /* Dedicated Charging Port */
>>         POWER_SUPPLY_TYPE_USB_CDP,      /* Charging Downstream Port */
>>         POWER_SUPPLY_TYPE_USB_ACA,      /* Accessory Charger Adapters */
>> +       POWER_SUPPLY_TYPE_USB_TYPE_C,   /* Type C Port */
>> +       POWER_SUPPLY_TYPE_USB_PD,       /* Type C Power Delivery Port */
>> +       POWER_SUPPLY_TYPE_USB_PD_DRP,   /* Type C PD Dual Role Port */
>
> Same change as in commit message. Thanks!
>
>>  };
>>
>>  enum power_supply_notifier_events {
>
>
>
>
> --
> Benson Leung
> Senior Software Engineer, Chrom* OS
> bleung@...omium.org