linux-kernel - [PATCH v2 0/2] Indroduce Exynos Multi Core Timer version 2

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Message-Id: <20211102001122.27516-1-youngmin.nam@samsung.com>
Date:   Tue,  2 Nov 2021 09:11:20 +0900
From:   Youngmin Nam <youngmin.nam@...sung.com>
To:     krzysztof.kozlowski@...onical.com, will@...nel.org,
        mark.rutland@....com, daniel.lezcano@...aro.org
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, pullip.cho@...sung.com,
        hoony.yu@...sung.com, hajun.sung@...sung.com,
        myung-su.cha@...sung.com, kgene@...nel.org,
        Youngmin Nam <youngmin.nam@...sung.com>
Subject: [PATCH v2 0/2] Indroduce Exynos Multi Core Timer version 2

Exynos Multi Core Timer version 2 is a new main system timer of next Exynos SoC.
Exynos MCT v2 consists of 1 64bit FRC(Free Running Counter) and 12 comparators.
Each comaprator produces interrupt when the value of current FRC + periods value matches with the
increasinig value of FRC.
So, 12 comaprators can be used as per-cpu event timer.
And RTC can be used as a backup clock source.

Changes in v2:
  - Add config dependency with ARCH_EXYNOS.
  - Remove 32bit of "mct-frc" which was used as a clock source in legacy SoC.
    (Currently, clock source was replaced with ARM arch timer)
  - Fix non-linux style comments and debug messege.
  - Fix license comments.
  - Update commit messege a bit to make it clear.

Youngmin Nam (2):
  clocksource/drivers/exynos_mct_v2: introduce Exynos MCT version 2
    driver for next Exynos SoC
  dt-bindings: timer: samsung,s5e99xx-mct: Document s5e99xx-mct bindings

 .../bindings/timer/samsung,s5e99xx-mct.yaml   |  91 ++++++
 drivers/clocksource/Kconfig                   |   7 +
 drivers/clocksource/Makefile                  |   1 +
 drivers/clocksource/exynos_mct_v2.c           | 298 ++++++++++++++++++
 drivers/clocksource/exynos_mct_v2.h           |  71 +++++
 5 files changed, 468 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/samsung,s5e99xx-mct.yaml
 create mode 100644 drivers/clocksource/exynos_mct_v2.c
 create mode 100644 drivers/clocksource/exynos_mct_v2.h

-- 
2.33.0