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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-06-30 15:27:32 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-06-30 15:27:32 -0300 |
| commit | 857286e4c5ae5d2e860fd15d4628e707b434d7e5 (patch) | |
| tree | 520ea5916f50fb2a4289d8d70438d559c6808b01 /drivers/clocksource/Kconfig | |
| parent | 51f382428c17f172f430f9be8de4246b8f15f97c (diff) | |
| parent | 007b350a58754a93ca9fe50c498cc27780171153 (diff) | |
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up fixes.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'drivers/clocksource/Kconfig')
| -rw-r--r-- | drivers/clocksource/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 39aa21d01e05..9fa28237715a 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -358,6 +358,20 @@ config ARM_GLOBAL_TIMER help This option enables support for the ARM global timer unit. +config ARM_GT_INITIAL_PRESCALER_VAL + int "ARM global timer initial prescaler value" + default 2 if ARCH_ZYNQ + default 1 + depends on ARM_GLOBAL_TIMER + help + When the ARM global timer initializes, its current rate is declared + to the kernel and maintained forever. Should it's parent clock + change, the driver tries to fix the timer's internal prescaler. + On some machs (i.e. Zynq) the initial prescaler value thus poses + bounds about how much the parent clock is allowed to decrease or + increase wrt the initial clock value. + This affects CPU_FREQ max delta from the initial frequency. + config ARM_TIMER_SP804 bool "Support for Dual Timer SP804 module" if COMPILE_TEST depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP |