linux-kernel - [PATCH v2 0/2] PM / devfreq: Add delayed timer for polling

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Date:   Thu,  9 Jul 2020 14:45:02 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     lukasz.luba@....com, k.konieczny@...sung.com, krzk@...nel.org,
        kgene@...nel.org
Cc:     s.nawrocki@...sung.com, willy.mh.wolff.ml@...il.com,
        b.zolnierkie@...sung.com, cw00.choi@...sung.com,
        chanwoo@...nel.org, myungjoo.ham@...sung.com,
        kyungmin.park@...sung.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 0/2] PM / devfreq: Add delayed timer for polling

Add the delayed timer to devfreq framework in order to support
the periodical polling mode without stop caused by CPU idle state.
Some Non-CPU device must need to monitor the device status like
utilization regardless of CPU state.

- patch1 explains the detailed reason why the delayed timer is required.
- patch2 initializes that exynos5422-dmc device use delayed timer as default
instead of deferrable timer.

Changes from v2:
- Add reviewed-by tag
- Fix typo on patch description
- Remove 'RFC' work from patch title
- Check whether 'df->governor' is NULL or not on timer_store()

Chanwoo Choi (2):
  PM / devfreq: Add support delayed timer for polling mode
  memory: samsung: exynos5422-dmc: Use delayed timer as default

 Documentation/ABI/testing/sysfs-class-devfreq | 12 +++
 drivers/devfreq/devfreq.c                     | 86 ++++++++++++++++++-
 drivers/memory/samsung/exynos5422-dmc.c       |  1 +
 include/linux/devfreq.h                       |  9 ++
 4 files changed, 107 insertions(+), 1 deletion(-)

-- 
2.17.1