linux-kernel - Re: [linux-nfc] Re: [PATCH 2/2] nfc: s3fwrn5: i2c: Enable optional clock from device tree

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Date:   Thu, 20 May 2021 09:41:31 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Bongsu Jeon <bongsu.jeon@...sung.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, linux-nfc@...ts.01.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [linux-nfc] Re: [PATCH 2/2] nfc: s3fwrn5: i2c: Enable optional
 clock from device tree

On Wed, May 19, 2021 at 11:58:38AM -0400, Krzysztof Kozlowski wrote:
> > 
> > Personally, I just skip all firmware/RF configuration (which works thanks
> > to commit 4fb7b98c7be3 ("nfc: s3fwrn5: skip the NFC bootloader mode")).
> > That way, S3FWRN5 just continues using the proper configuration
> > that was loaded by the vendor drivers at some point. :)
> 
> But isn't that configuration lost after power off?
> 

I don't know exactly but I don't think it's lost. At least the firmware
and rfreg configuration seem to be preserved since I've never provided
the driver with the necessary firmware. It just works without :)

Stephan