linux/arch/tile/kernel
Nicolai Stange 45b586ef23 tile/time: Set ->min_delta_ticks and ->max_delta_ticks
In preparation for making the clockevents core NTP correction aware,
all clockevent device drivers must set ->min_delta_ticks and
->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a
clockevent device's rate is going to change dynamically and thus, the
ratio of ns to ticks ceases to stay invariant.

Currently, the tile's timer clockevent device is initialized as follows:

  evt->max_delta_ns = clockevent_delta2ns(MAX_TICK, evt);

and

  .min_delta_ns = 1000,

The first one translates to a ->max_delta_ticks value of MAX_TICK.
For the latter, note that the clockevent core will superimpose a
minimum of 1us by itself -- setting ->min_delta_ticks to 1 is safe here.

Initialize ->min_delta_ticks and ->max_delta_ticks with these values.

This patch alone doesn't introduce any change in functionality as the
clockevents core still looks exclusively at the (untouched) ->min_delta_ns
and ->max_delta_ns. As soon as this has changed, a followup patch will
purge the initialization of ->min_delta_ns and ->max_delta_ns from this
driver.

Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
2017-04-14 13:11:21 -07:00
..
vdso
Makefile
asm-offsets.c
backtrace.c
compat.c
compat_signal.c
early_printk.c
entry.S
ftrace.c
hardwall.c
head_32.S
head_64.S
hvglue.S
hvglue_trace.c
intvec_32.S
intvec_64.S
irq.c
jump_label.c
kgdb.c
kprobes.c
machine_kexec.c
mcount_64.S
messaging.c
module.c
pci-dma.c
pci.c
pci_gx.c
perf_event.c
pmc.c
proc.c
process.c
ptrace.c
reboot.c
regs_32.S
regs_64.S
relocate_kernel_32.S
relocate_kernel_64.S
setup.c
signal.c
single_step.c
smp.c
smpboot.c
stack.c
sys.c
sysfs.c
tile-desc_32.c
tile-desc_64.c
time.c
tlb.c
traps.c
unaligned.c
usb.c
vdso.c
vmlinux.lds.S