Re: [PATCH 1/3] usb: USB Type-C Connector Class
From: Felipe Balbi
Date: Thu Feb 11 2016 - 03:55:28 EST
Oliver Neukum <oneukum@xxxxxxxx> writes:
> On Tue, 2016-02-09 at 19:01 +0200, Heikki Krogerus wrote:
>> The purpose of this class is to provide unified interface
>> for user space to get the status and basic information about
>> USB Type-C Connectors in the system, control data role
>> swapping, and when USB PD is available, also power role
>> swapping and Altenate Modes.
>>
>> The class will export the following interfaces for every
>> USB Type-C Connector in the system to sysfs:
>>
>> 1. connected - Connection status of the connector
>> 2. alternate_mode - The current Alternate Mode
>> 3. alternate_modes - Lists all Alternate Modes the connector supports
>
> These names are a bit problematic, as they are too similar.
> How about
>
> current_alternate_mode
> potential_alternate_modes
available_ ?
>> 4. partner_alt_modes - Lists partner's Alternate Modes when connected
partner_alternate_modes ? (it's a file name, we can spell it out)
>> 5. partner_type - Can be USB, Charger, Alt Mode or Accessory
>> 6. data_role - The current data role, host or device
>> 7. data_roles - Data roles supported by the connector
current_data_role
available_data_roles
>> 8. power_role - Connector's current power role, source or sink
>> 9. power_roles - Power roles supported by the connector
ditto...
>> 10. power_operation_mode - The current power level in use
>> 11. usb_pd - yes if the connector supports USB PD.
supports_usb_power_delivery ?
>> 12. audio_accessory - yes if the connector supports Audio Accessory
supports_audio_accessory
>> 13. debug_accessory - yes if the connector supports Debug Accessory
supports_debug_accessory
> Doesn't this need locking?
> And why wouldn't user space want to preselect a mode?
isn't USB always the default mode ?
--
balbi
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