[PATCH v5 0/4] Support timer drivers as loadable modules

Walter Chang (張維哲) Walter.Chang at mediatek.com
Sun Jun 18 19:17:31 PDT 2023


On Wed, 2023-05-17 at 10:25 +0800, walter.chang at mediatek.com wrote:
> From: Walter Chang <walter.chang at mediatek.com>
> 
> This set of patches aims to make SoC related timer drivers, such as 
> timer-mediatek.c become loadable modules for the Generic Kernel Image
> (GKI).
> 
> This driver registers an always-on timer as tick_broadcast_device on 
> MediaTek SoCs. If the system does not load this module at startup, 
> system will also boot normally by using built-in `bc_hrtimer`
> instead.
> Besides, the previous experiment [1] indicates that the SYST/GPT, in 
> combination with a loadable module, is fully operational.
> 
> The first three patches export functions and remove __init markings
> to 
> support loadable timer modules.
> 
> The fourth patch makes timer-mediatek.c become loadable module for
> GKI.
> 
> [1]
> 
https://lore.kernel.org/all/32777456f8e0f98e4cd5b950f421d21f71b149cf.camel@mediatek.com/#t
> 
> [v5]
> - Add Signed-off-by tags in all patches
> - Add Acked-by tags and Reviewed-by tags
> 
> [v4]
> - Fix review comments pointed by Angelo
> 
> [v3]
> - Rebase on linux-next
> 
> [v2]
> - Convert timer-mediatek.c driver to loadable module
> 
> Chun-Hung Wu (4):
>   time/sched_clock: Export sched_clock_register()
>   clocksource/drivers/mmio: Export clocksource_mmio_init()
>   clocksource/drivers/timer-of: Remove __init markings
>   clocksource/drivers/timer-mediatek: Make timer-mediatek become
>     loadable module
> 
>  drivers/clocksource/Kconfig          |  2 +-
>  drivers/clocksource/mmio.c           |  8 ++++---
>  drivers/clocksource/timer-mediatek.c | 33
> ++++++++++++++++++++++++++++
>  drivers/clocksource/timer-of.c       | 23 +++++++++----------
>  drivers/clocksource/timer-of.h       |  6 ++---
>  kernel/time/sched_clock.c            |  4 ++--
>  6 files changed, 56 insertions(+), 20 deletions(-)
> 

Gentle ping for this series.

Thanks,
Walter Chang


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