lkml.org 
[lkml]   [2019]   [Apr]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 00/12] clocksource: improve Atmel TCB timer driver
From
Date

Hi Alexandre,

except the comment for 3/12, the series looks good to me.



On 03/04/2019 16:11, Alexandre Belloni wrote:
> Hi,
>
> This series immproves the Atmel TCB clocksource driver to address the
> most urgent shortcomings:
> - the current tcb_clksrc driver is probed too late to be able to be used at
> boot and we now have SoCs that don't have a PIT. They currently are not able
> to boot an upstream kernel.
> - using the PIT doesn't work well with preempt-rt because its interrupt is
> shared (in particular with the UART) and their interrupt flags are
> incompatible). This also happen with the threadedirq command line
> switch.
> - there is currently no high resolution sched_clock.
>
> The plan is to get those changes upstream as soon as possible as they
> arre fixing real issues that people are facing. There are further
> changes needed on the clocksource driver to try to stop wasting a TCB
> channel.
> the PWM TCB driver will also be changed to actually used the reviewed
> binding and this will allow to get rif of atmel_tclib.
>
> Alexandre Belloni (12):
> ARM: at91: move SoC specific definitions to SoC folder
> misc: atmel_tclib: drop AVR32 support
> misc: atmel_tclib: move definitions to header file
> clocksource/drivers/tcb_clksrc: stop depending on atmel_tclib
> clocksource/drivers/tcb_clksrc: Use tcb as sched_clock
> ARM: at91: Implement clocksource selection
> clocksource/drivers/tcb_clksrc: move Kconfig option
> clocksource/drivers/timer-atmel-pit: rework Kconfig option
> clocksource/drivers/tcb_clksrc: Rename the file for consistency
> ARM: configs: at91: unselect PIT
> misc: atmel_tclib: do not probe already used TCBs
> clocksource/drivers/timer-atmel-tcb: Use ARRAY_SIZE instead of
> hardcoded size
>
> arch/arm/configs/at91_dt_defconfig | 1 +
> arch/arm/configs/sama5_defconfig | 1 +
> arch/arm/mach-at91/Kconfig | 23 ++++
> drivers/clocksource/Kconfig | 12 +-
> drivers/clocksource/Makefile | 2 +-
> .../{tcb_clksrc.c => timer-atmel-tcb.c} | 123 ++++++++++++------
> drivers/misc/Kconfig | 24 ----
> drivers/misc/atmel_tclib.c | 37 +-----
> drivers/pwm/pwm-atmel-tcb.c | 2 +-
> .../atmel_tc.h => soc/at91/atmel_tcb.h} | 25 +++-
> 10 files changed, 146 insertions(+), 104 deletions(-)
> rename drivers/clocksource/{tcb_clksrc.c => timer-atmel-tcb.c} (81%)
> rename include/{linux/atmel_tc.h => soc/at91/atmel_tcb.h} (95%)
>


--
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

\
 
 \ /
  Last update: 2019-04-11 18:34    [W:0.159 / U:48.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site