Hello,
This patch series contain:
- devicetree bindings clarification for rockchip timers
- dts files fixes for rk3228-evb, rk3229-evb and rk3188
- implementation of clocksource and sched clock for rockchip SoC
The clock supplying the arm-global-timer on the rk3188 is coming from the
the cpu clock itself and thus changes its rate everytime cpufreq adjusts
the cpu frequency making this timer unsuitable as a stable clocksource.
The rk3188, rk3288 and following socs share a separate timer block already
handled by the rockchip-timer driver. Therefore adapt this driver to also
be able to act as clocksource on rk3188.
In order to test clocksource you can run following commands and check
how much time it take in real. On rk3188 it take about ~45 seconds.
cpufreq-set -f 1.6GHZ
date; sleep 60; date
rk3288 (and probably anything newer) is irrelevant to this patch,
as it has the arch timer interface. This patch may be usefull
for Cortex-A9/A5 based parts.
Regards,
Alexander.
Changes in v5:
- Add 'Acked-by: Rob Herring <robh@xxxxxxxxxx>' to 1/8
http://lists.infradead.org/pipermail/linux-rockchip/2016-December/013308.html
- Add 'Reviwed-by: Heiko Stübner <heiko@xxxxxxxxx>' to series
- change timer compatible property in the rk322x.dtsi 2/8
http://lists.infradead.org/pipermail/linux-rockchip/2017-January/013784.html
- updated comment message for 4/8
http://lists.infradead.org/pipermail/linux-rockchip/2017-January/013786.html
- updated comment message for 5/8
http://lists.infradead.org/pipermail/linux-rockchip/2017-January/013787.html
- fixed build error for 8/8
http://lists.infradead.org/pipermail/linux-rockchip/2017-January/013789.html
Changes in v4:
merged 7 and 8 from series 3
merged 10, 11, 12, 13 from series 3
fixed commit message
Changes in v3:
added patches:
ARM: dts: rockchip: disable arm-global-timer for rk3188
clocksource/drivers/rockchip_timer: Prevent ftrace recursion
devicetree v1 patches:
https://patchwork.ozlabs.org/patch/699019/
https://patchwork.ozlabs.org/patch/699020/
kernel v1 patches:
https://patchwork.kernel.org/patch/9443975/
https://patchwork.kernel.org/patch/9443971/
https://patchwork.kernel.org/patch/9443959/
https://patchwork.kernel.org/patch/9443963/
https://patchwork.kernel.org/patch/9443979/
https://patchwork.kernel.org/patch/9443989/
https://patchwork.kernel.org/patch/9443987/
https://patchwork.kernel.org/patch/9443977/
https://patchwork.kernel.org/patch/9443991/
Alexander Kochetkov (8):
dt-bindings: clarify compatible property for rockchip timers
ARM: dts: rockchip: update compatible property for rk322x timer
ARM: dts: rockchip: add timer entries to rk3188 SoC
ARM: dts: rockchip: disable arm-global-timer for rk3188
clocksource/drivers/rockchip_timer: split bc_timer into rk_timer and
rk_clock_event_device
clocksource/drivers/rockchip_timer: low level routines take rk_timer
as parameter
clocksource/drivers/rockchip_timer: move TIMER_INT_UNMASK out of
rk_timer_enable()
clocksource/drivers/rockchip_timer: implement clocksource timer
.../bindings/timer/rockchip,rk-timer.txt | 12 +-
arch/arm/boot/dts/rk3188.dtsi | 17 ++
arch/arm/boot/dts/rk322x.dtsi | 2 +-
drivers/clocksource/rockchip_timer.c | 207 +++++++++++++++-----
4 files changed, 183 insertions(+), 55 deletions(-)
--
1.7.9.5
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