diff options
| author | Caleb James DeLisle <cjd@cjdns.fr> | 2025-05-07 13:44:55 +0000 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2025-05-16 11:10:33 +0200 |
| commit | 3b4c33ac87d0d11308f4445ecec2a124e2e77724 (patch) | |
| tree | 92b199e6334aa3cecc78b0a3ed83620184c7bd63 /drivers/clocksource/Kconfig | |
| parent | 30fddbd5325459102e448c9a26a1bc15ef563381 (diff) | |
clocksource/drivers: Add EcoNet Timer HPT driver
Introduce a clocksource driver for the so-called high-precision timer (HPT)
in the EcoNet EN751221 and EN751627 MIPS SoCs.
It's a 32 bit upward-counting one-shot timer which relies on the crystal so it
is unaffected by CPU power mode. On MIPS 34K devices (single core) there is
one timer, and on 1004K devices (dual core) there are two.
Each timer has two sets of count/compare registers so that there is one for
each of the VPEs on the core. Because each core has 2 VPEs, register selection
takes the CPU number / 2 for the timer corrisponding to the core, then CPU
number % 2 for the register corrisponding to the VPE.
These timers use a percpu-devid IRQ to route interrupts to the VPE which set
the event.
Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr>
Link: https://lore.kernel.org/r/20250507134500.390547-3-cjd@cjdns.fr
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource/Kconfig')
| -rw-r--r-- | drivers/clocksource/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 3b63a2874f56..645f517a1ac2 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -73,6 +73,14 @@ config DW_APB_TIMER_OF select DW_APB_TIMER select TIMER_OF +config ECONET_EN751221_TIMER + bool "EcoNet EN751221 High Precision Timer" if COMPILE_TEST + depends on HAS_IOMEM + select CLKSRC_MMIO + select TIMER_OF + help + Support for CPU timer found on EcoNet MIPS based SoCs. + config FTTMR010_TIMER bool "Faraday Technology timer driver" if COMPILE_TEST depends on HAS_IOMEM |