diff options
Diffstat (limited to 'drivers/clocksource/Kconfig')
| -rw-r--r-- | drivers/clocksource/Kconfig | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 39aa21d01e05..eb661b539a3e 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -358,9 +358,23 @@ 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 + depends on GENERIC_SCHED_CLOCK && HAVE_CLK select CLKSRC_MMIO select TIMER_OF if OF @@ -570,12 +584,12 @@ config H8300_TPU config CLKSRC_IMX_GPT bool "Clocksource using i.MX GPT" if COMPILE_TEST - depends on (ARM || ARM64) && CLKDEV_LOOKUP + depends on (ARM || ARM64) && HAVE_CLK select CLKSRC_MMIO config CLKSRC_IMX_TPM bool "Clocksource using i.MX TPM" if COMPILE_TEST - depends on (ARM || ARM64) && CLKDEV_LOOKUP + depends on (ARM || ARM64) && HAVE_CLK select CLKSRC_MMIO select TIMER_OF help |