linux-kernel - Re: [PATCH v4 09/18] usb: dwc3: qcom: Override VBUS when using gpio_usb

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Message-ID: <832a97f1-e138-5b2a-755a-c551f7264cbd@linaro.org>
Date:   Fri, 7 Feb 2020 15:04:05 +0000
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     Jack Pham <jackp@...eaurora.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        gregkh@...uxfoundation.org, balbi@...nel.org,
        bjorn.andersson@...aro.org, linux-kernel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Manu Gautam <mgautam@...eaurora.org>
Subject: Re: [PATCH v4 09/18] usb: dwc3: qcom: Override VBUS when using
 gpio_usb_connector

On 07/02/2020 10:50, Bryan O'Donoghue wrote:
> 
> Maybe I'm wrong...
> 
> Looking a bit closer at the role-switch code it might be possible to 
> register multiple devices _as-is_ so long as you have a pointer to the 
> relevant parent...

Soo... its possible to create a new role-switch device relatively easily 
@usb_role_switch_register() but, the drivers calling the role-switch 
callback have a 1:1 mapping between role-switch call and receiver.

Doing something inside DWC3 <=> DWC3::QCOM looks like less of a rewrite.