[PATCH 0/2] AM64: Tick timer fixes

Nishanth Menon nm at ti.com
Mon Mar 7 14:41:14 CET 2022


On 14:50-20220307, Vignesh Raghavendra wrote:
> Patch 1 switches AM64 to use GTC as system timer at A53 SPL/U-boot
> stage as done in other TI K3 platforms

Minor nuance clarification:
We don't use System timer (aka GTC) directly. System timer[1] feeds the
armv8  per cpu timer[2] - and the per-cpu timer is what we use.

Will be good to fixup the commit messages and $subject accordingly.

> Patch 2 corrects DM timer freq to be 200MHz (used at R5 SPL stage)
> 
> Vignesh Raghavendra (2):
>   configs: am64x_evm_a53_defconfig: Switch to GTC as tick timer
>   ARM: dts: k3-am642: Fix correct timer frequency
> 
>  arch/arm/dts/k3-am642-evm-u-boot.dtsi | 2 +-
>  arch/arm/dts/k3-am642-sk-u-boot.dtsi  | 2 +-
>  configs/am64x_evm_a53_defconfig       | 3 ---
>  3 files changed, 2 insertions(+), 5 deletions(-)
> 
> -- 
> 2.35.1
> 

[1] https://developer.arm.com/documentation/102379/0000/System-Counter?lang=en
[2] https://developer.arm.com/documentation/den0024/a/Multi-core-processors/Multi-processing-systems/Timers

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D


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