linux-kernel - Re: [PATCH] ARM: dts: Fix timer regression for beagleboard revision c

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Message-ID: <Ybbdnr96H58TkytD@atomide.com>
Date:   Mon, 13 Dec 2021 07:43:58 +0200
From:   Tony Lindgren <tony@...mide.com>
To:     Jarkko Nikula <jarkko.nikula@...mer.com>
Cc:     linux-omap@...r.kernel.org,
        Benoît Cousson <bcousson@...libre.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH] ARM: dts: Fix timer regression for beagleboard revision c

* Jarkko Nikula <jarkko.nikula@...mer.com> [211212 19:05]:
> On Sat, Dec 11, 2021 at 05:30:57PM +0200, Jarkko Nikula wrote:
> This I used years before your patch and by some reason I confused to use
> new omap3-beagle-ab4.dtb when testing your patch yesterday:
> 
> > cat arch/arm/boot/dts/omap3-beagle-ab4.dtb >>arch/arm/boot/zImage
> 
> without realizing my Beagle Board version is not between A to B4 but C2.
> So when using the omap3-beagle.dtb your patch fixes the regression I
> found.
> 
> Tested-by: Jarkko Nikula <jarkko.nikula@...mer.com>

OK good to hear omap3-beagle.dtb now works for beagles that don't have
the A to B4 hardware timer issue :) And thanks for testing.

It seems the beagle revisions A to B4 are broken for any kind of power
management as the clockevent timer for those boards is not always on.
Probably not worth spending much effort on those. Maybe the PMIC could
be reconfigured on the buggy revisions in addition to the timer quirks
if somebody still cares for those board revisions.

Regards,

Tony