[PATCHv5 00/10] clocksource: sunxi: Timer fixes and cleanup

Daniel Lezcano daniel.lezcano at linaro.org
Tue Jul 16 10:47:57 EDT 2013

On 07/11/2013 06:31 PM, Maxime Ripard wrote:

Applied to my tree for 3.12.

  -- Daniel

> Hi everyone,
> The first timer code we merged when adding support for the A13 some
> time back was mostly a clean up from the source drop we had, without
> any documentation.  This happened to work, but the code merged in
> turned out to be far from perfect, and had several flaws.
> This patchset hopefully fixes these flaws, and cleanup most of the
> driver as well, to end up in an almost complete rewrite of it (even
> though it's not that long).
> It also finally adds a clocksource driver using the second timer as
> our monotonic clock source.
> These flaws have all been spotted when trying to add the A31 support,
> work that is still ongoing, but will hopefully benefit from this
> patchset as well.
> Thanks,
> Maxime
> Changes from v4:
>   - Removed the last clk_get_rate() user
>   - Got a few beers
> Changes from v3:
>   - Reintroduce the rate variable to cache the parent clock rate
>   - Remove the interval programming at probe time that was
>     reintroduced in the v3 due to a poor rebase.
> Changes from v2:
>   - Use the clocksource timer to get the amount of time we have to
>     wait for when disabling and enabling back a timer
>   - Added patch to add parenthesis around the macros arguments
>   - Renamed the AUTORELOAD register define to the more meaningful
>     RELOAD name
> Changes from v1:
>   - Rebased on top of linux-next to benefit from the move to all
>     architectures of the sched_clock functions
>   - Moved the clock source to the second timer instead of the 64 bits
>     free-running counter like suggested by Thomas.
> Maxime Ripard (10):
>   clocksource: sun4i: Use the BIT macros where possible
>   clocksource: sun4i: Wrap macros arguments in parenthesis
>   clocksource: sun4i: rename AUTORELOAD define to RELOAD
>   clocksource: sun4i: Add clocksource and sched clock drivers
>   clocksource: sun4i: Don't forget to enable the clock we use
>   clocksource: sun4i: Fix the next event code
>   clocksource: sun4i: Factor out some timer code
>   clocksource: sun4i: Remove TIMER_SCAL variable
>   clocksource: sun4i: Cleanup parent clock setup
>   clocksource: sun4i: Fix bug when switching from periodic to oneshot
>     modes
>  drivers/clocksource/sun4i_timer.c | 110 +++++++++++++++++++++++++++-----------
>  1 file changed, 78 insertions(+), 32 deletions(-)

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