From: <walter.chang@mediatek.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
"Maciej W . Rozycki" <macro@orcam.me.uk>,
John Stultz <jstultz@google.com>
Cc: <wsd_upstream@mediatek.com>, <stanley.chu@mediatek.com>,
<Chun-hung.Wu@mediatek.com>, <Freddy.Hsin@mediatek.com>,
<walter.chang@mediatek.com>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>
Subject: [PATCH linux-next v4 0/4] Support timer drivers as loadable modules
Date: Fri, 21 Apr 2023 11:46:45 +0800 [thread overview]
Message-ID: <20230421034649.15247-1-walter.chang@mediatek.com> (raw)
From: Walter Chang <walter.chang@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
[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(-)
--
2.18.0
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next reply other threads:[~2023-04-21 3:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-21 3:46 walter.chang [this message]
2023-04-21 3:46 ` [PATCH linux-next v4 1/4] time/sched_clock: Export sched_clock_register() walter.chang
2023-05-15 11:32 ` AngeloGioacchino Del Regno
2023-04-21 3:46 ` [PATCH linux-next v4 2/4] clocksource/drivers/mmio: Export clocksource_mmio_init() walter.chang
2023-04-21 3:46 ` [PATCH linux-next v4 3/4] clocksource/drivers/timer-of: Remove __init markings walter.chang
2023-04-21 3:46 ` [PATCH linux-next v4 4/4] clocksource/drivers/timer-mediatek: Make timer-mediatek become loadable module walter.chang
2023-05-15 11:32 ` AngeloGioacchino Del Regno
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