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| From | Tony Lindgren <tony@atomide.com> |
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2] ARM: omap2: am437x: rollback to use omap3_gptimer_timer_init() |
| Date | Tue, 27 Dec 2016 18:40:01 +0100 |
| Message-ID | <sT3Tb-53g-3@gated-at.bofh.it> (permalink) |
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| X-Original-Cc | t-kristo@ti.com, linux@armlinux.org.uk, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Grygorii Strashko <grygorii.strashko@ti.com>, Lokesh Vutla <lokeshvutla@ti.com> |
| X-Original-Date | Tue, 27 Dec 2016 09:35:49 -0800 |
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| Xref | csiph.com linux.kernel:1547699 |
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* Keerthy <j-keerthy@ti.com> [161204 19:58]:
> From: Grygorii Strashko <grygorii.strashko@ti.com>
>
> The commit 55ee7017ee31 ("arm: omap2: board-generic: use
> omap4_local_timer_init for AM437x") unintentionally changes the
> clocksource devices for AM437x from OMAP GP Timer to SyncTimer32K.
>
> Unfortunately, the SyncTimer32K is starving from frequency deviation
> as mentioned in commit 5b5c01359152 ("ARM: OMAP2+: AM43x: Use gptimer
> as clocksource") and, as reported by Franklin [1], even its monotonic
> nature is under question (most probably there is a HW issue, but it's
> still under investigation).
>
> Taking into account above facts It's reasonable to rollback to the use
> of omap3_gptimer_timer_init().
>
> [1] http://www.spinics.net/lists/linux-omap/msg127425.html
Applying into omap-for-v4.10/fixes thanks.
Tony
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Re: [PATCH v2] ARM: omap2: am437x: rollback to use omap3_gptimer_timer_init() Tony Lindgren <tony@atomide.com> - 2016-12-27 18:40 +0100
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