linux-kernel - Re: [PATCH v2] mmc: mxs-mmc: Introduce regulator support

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Date:   Mon, 28 Jan 2019 11:27:30 +0100
From:   Robin van der Gracht <robin@...tonic.nl>
To:     Martin Kepplinger <martink@...teo.de>
Cc:     linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        ulf.hansson@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, linux-imx@....com,
        linux-kernel@...r.kernel.org,
        Martin Kepplinger <martin.kepplinger@...zinger.com>
Subject: Re: [PATCH v2] mmc: mxs-mmc: Introduce regulator support

Hi Martin,

On Mon, 28 Jan 2019 11:20:22 +0100
Martin Kepplinger <martink@...teo.de> wrote:

> From: Martin Kepplinger <martin.kepplinger@...zinger.com>
> 
> This adds support for explicitly switching the mmc's power on and off
> which is needed for example for WL1837 wifi controllers. ip link set wlan0 down
> doesn't turn off the VMMC regulator which leads to hangs when loading firmware.
> 
> Tested on i.MX28.
> 
> Signed-off-by: Martin Kepplinger <martin.kepplinger@...zinger.com>
> ---
> 
> again, this isn't new. it's (rebased and simplified)
> https://patchwork.kernel.org/patch/4365751/
> 
> Thanks Robin for your input!
> 
> revision history
> ----------------
> v1: was just a question why this hasn't gone in earlier.

Not sure why it never made it. I created it for use with a wl1271 which
wan't properly reset in case of a fault. Also combined with imx28.

Regards,
Robin van der Gracht