linux-kernel - Re: [PATCH v3 2/2] usb: gadget: composite: Draw 100mA current if not configured

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Message-ID: <3a189c0a-e82b-a80b-ac63-0f2c703b2eaa@quicinc.com>
Date:   Fri, 24 Feb 2023 10:27:35 +0530
From:   Prashanth K <quic_prashk@...cinc.com>
To:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jakob Koschel <jakobkoschel@...il.com>,
        Jó Ágila Bitsch <jgilab@...il.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Pratham Pratap <quic_ppratap@...cinc.com>,
        Jack Pham <quic_jackp@...cinc.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] usb: gadget: composite: Draw 100mA current if not
 configured



On 24-02-23 01:40 am, Thinh Nguyen wrote:
> On Thu, Feb 23, 2023, Prashanth K wrote:
>> Currently we don't change the current value if device isn't in
>> configured state. But the battery charging specification says,
> 
> Can you provide the spec section also?
> 
1.2 Background
1.4.13 Standard Downstream Port

Did you mean to add these in the commit message?
>> device can draw up to 100mA of current if its in unconfigured
> 
> Is this related to being self-powered?
I think its applicable for bus-powered devices.

Thanks
Prashanth K