Messages in this thread | | | Subject | Re: [PATCH v3 0/9] clocksource: improve Atmel TCB timer driver | From | Daniel Lezcano <> | Date | Sun, 28 Apr 2019 11:54:23 +0200 |
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Applied, thanks.
-- Daniel
On 26/04/2019 23:47, 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 are 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 use the reviewed binding > and this will allow to get rid of atmel_tclib. > > Changes in v3: > - collected ack from GKH > - return -EBUSY instead of 0 when the TCB is already used > > Changes in v2: > - collected acks from Thierry and Arnd > - dropped most of the atmel_tclib changes that coud be separated. > - added a patch from kbuild > - dropped the patch removing the PIT from the defconfig > - moved the atmel_tcb.h inclusion in drivers/pwm/pwm-atmel-tcb.c as requested > by Thierry > - stopped using atmel_tcb_config > - reworked the irq number parsing to only care for channel 2 > > > Alexandre Belloni (8): > ARM: at91: move SoC specific definitions to SoC folder > 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 > misc: atmel_tclib: do not probe already used TCBs > > kbuild test robot (1): > clocksource/drivers/timer-atmel-tcb: tc_clksrc_suspend() can be static > > arch/arm/mach-at91/Kconfig | 23 ++++ > drivers/clocksource/Kconfig | 12 +- > drivers/clocksource/Makefile | 2 +- > .../{tcb_clksrc.c => timer-atmel-tcb.c} | 130 ++++++++++++------ > drivers/misc/Kconfig | 24 ---- > drivers/misc/atmel_tclib.c | 5 +- > drivers/pwm/pwm-atmel-tcb.c | 2 +- > .../atmel_tc.h => soc/at91/atmel_tcb.h} | 4 +- > 8 files changed, 129 insertions(+), 73 deletions(-) > rename drivers/clocksource/{tcb_clksrc.c => timer-atmel-tcb.c} (79%) > rename include/{linux/atmel_tc.h => soc/at91/atmel_tcb.h} (99%) >
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