linux-kernel - [PATCH v3 0/2] clocksource: Add support for Oxford Semiconductor RPS Dual Timer

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Date:	Wed, 15 Jun 2016 12:13:25 +0200
From:	Neil Armstrong <narmstrong@...libre.com>
To:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	daniel.lezcano@...aro.org, tglx@...utronix.de
Cc:	Neil Armstrong <narmstrong@...libre.com>
Subject: [PATCH v3 0/2] clocksource: Add support for Oxford Semiconductor RPS Dual Timer


Adds driver for the Oxford Semiconductor RPS Dual Timer as base of the OX810SE
clock tick event and sched clock source.

This driver was posted with the initial OX810SE platform patchset at :
http://lkml.kernel.org/r/1457005210-18485-5-git-send-email-narmstrong@baylibre.com
and
http://lkml.kernel.org/r/1457005210-18485-6-git-send-email-narmstrong@baylibre.com

But since the SP804 was very similar, I decided to adapt it for OX810SE usage.
For some reasons, the SP804 has a lot of legacy code for non-dt, non-multiarch
platforms and needs a complete rewrite.
For now, this adds a dedicated driver with the same bindings as intended for SP804.

Changes since v2 at http://lkml.kernel.org/r/1465315452-20599-1-git-send-email-narmstrong@baylibre.com :
- Add Kconfig text with COMPILE_TEST options
- Add CLKSRC_OF select
- Add clean rollback of init in case of error
- Prepare for clocksource and clockevent rollback by returning an int value
- Switch kzalloc WARN_ON to a pr_err

Changes since v1 at http://lkml.kernel.org/r/1464688198-9655-1-git-send-email-narmstrong@baylibre.com :
- fix timer_shutdown behaviour
- clean up period calculation

Neil Armstrong (2):
  clocksource: Add Oxford Semiconductor RPS Dual Timer
  dt-bindings: clocksource: Add Add Oxford Semiconductor RPS Timer
    bindings

 .../devicetree/bindings/timer/oxsemi,rps-timer.txt |  17 ++
 drivers/clocksource/Kconfig                        |   7 +
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/timer-oxnas-rps.c              | 290 +++++++++++++++++++++
 4 files changed, 315 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/oxsemi,rps-timer.txt
 create mode 100644 drivers/clocksource/timer-oxnas-rps.c

-- 
1.9.1