Messages in this thread |  | | From | Alexandre Belloni <> | Subject | [PATCH v4 0/6] clocksource: rework Atmel TCB timer driver | Date | Wed, 18 Apr 2018 12:51:37 +0200 |
| |
Hi,
This series gets back on the TCB drivers rework. It introduces a new driver to handle the clocksource and clockevent devices.
As a reminder, this is necessary because: - 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 a mainline 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) - the current solution is wasting some TCB channels
The plan is to get this driver upstream, then convert the TCB PWM driver to be able to get rid of the tcb_clksrc driver along with atmel_tclib.
Changes in v4: - rebased on top of v4.17-rc1 - fixed an issue when setting max_delta for clockevents_config_and_register
Alexandre Belloni (6): ARM: at91: add TCB registers definitions clocksource/drivers: Add a new driver for the Atmel ARM TC blocks clocksource/drivers: atmel-pit: make option silent ARM: at91: Implement clocksource selection ARM: configs: at91: use new TCB timer driver ARM: configs: at91: unselect PIT
arch/arm/configs/at91_dt_defconfig | 2 +- arch/arm/configs/sama5_defconfig | 2 +- arch/arm/mach-at91/Kconfig | 25 ++ drivers/clocksource/Kconfig | 13 +- drivers/clocksource/Makefile | 3 +- drivers/clocksource/timer-atmel-tcb.c | 608 ++++++++++++++++++++++++++ include/soc/at91/atmel_tcb.h | 216 +++++++++ 7 files changed, 865 insertions(+), 4 deletions(-) create mode 100644 drivers/clocksource/timer-atmel-tcb.c create mode 100644 include/soc/at91/atmel_tcb.h
-- 2.17.0
|  |