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charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Apr 12, 2020 at 10:44:01AM +0200, Geert Uytterhoeven wrote: >Hi Sasha, > >On Sun, Apr 12, 2020 at 1:11 AM Sasha Levin wrote: >> From: Geert Uytterhoeven >> >> [ Upstream commit 408324a3c5383716939eea8096a0f999a0665f7e ] >> >> SH-Mobile AG5 and R-Car H1 SoCs are based on the Cortex-A9 MPCore, which >> includes a global timer. >> >> Enable the ARM global timer on these SoCs, which will be used for: >> - the scheduler clock, improving scheduler accuracy from 10 ms to 3 or >> 4 ns, >> - delay loops, allowing removal of calls to shmobile_init_delay() from >> the corresponding machine vectors. >> >> Note that when using an old DTB lacking the global timer, the kernel >> will still work. However, loops-per-jiffies will no longer be preset, >> and the delay loop will need to be calibrated during boot. > >I.e. to avoid this delay, this patch is best backported after backporting >8443ffd1bbd5be74 ("ARM: dts: r8a7779: Add device node for ARM global timer"), >df1a0aac0a533e6f ("ARM: dts: sh73a0: Add device node for ARM global timer"). > >While the former has been backported to v5.[45]-stable, the latter hasn't, >probably because it depends on >61b58e3f6e518c51 ("ARM: dts: sh73a0: Rename twd clock to periph clock") > >So please backport the last two commits first. Done, thanks! -- Thanks, Sasha _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel