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

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Date:   Fri, 17 Dec 2021 14:17:21 +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

* Tony Lindgren <tony@...mide.com> [211213 05:44]:
> * 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.

Anyways, applying this fix into omap-for-v5.17/fixes-not-urgent.

Regards,

Tony