linux-kernel - Re: [PATCH v5 0/6] ARM: davinci: ohci-da8xx: model the vbus GPIO as a fixed regulator

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Message-ID: <bb650c9b-ebf3-719b-861f-6d76c26cd1fd@ti.com>
Date:   Fri, 12 Apr 2019 19:53:50 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Kevin Hilman <khilman@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v5 0/6] ARM: davinci: ohci-da8xx: model the vbus GPIO as a
 fixed regulator

On 12/04/19 6:06 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> Historically the power supply management in this driver has been handled
> in two separate places in parallel. Device-tree users simply defined an
> appropriate regulator, while two boards with no DT support (da830-evm and
> omapl138-hawk) passed functions defined in their respective board files
> over platform data. These functions simply used legacy GPIO calls to
> watch the oc GPIO for interrupts and disable the vbus GPIO when the irq
> fires.
> 
> Commit d193abf1c913 ("usb: ohci-da8xx: add vbus and overcurrent gpios")
> updated these GPIO calls to the modern API and moved them inside the
> driver.
> 
> This however is not the optimal solution for the vbus GPIO as it
> duplicates code. Instead we should model the GPIO as a fixed regulator
> that can be controlled with a GPIO.
> 
> This series adds fixed regulators for all users of vbus GPIO, adds
> overcurrent protection using the existing vbus regulator in the USB
> driver and removes the vbus GPIO calls once they're no longer used.
> 
> Tested on da830-evm with the module both built-in and loadable.

Applied to v5.2/soc with Alan's ack applied on 3/6

Thanks,
Sekhar