[PATCH 0/3] ARM sched_clock selection enhancements
Rob Herring
robherring2 at gmail.com
Mon Mar 11 22:26:34 EDT 2013
From: Rob Herring <rob.herring at calxeda.com>
In preparation to move more timer initialization to use CLKSRC_OF and
out of the platforms, a way to select the timer used for sched_clock is
needed. This series makes the ARM sched_clock support code prefer 64-bit
counters or higher frequency counters. This is sufficient at least on
ARM Ltd boards to use the 24MHz counter rather than sp804 and to always
use the 64-bit architected timer when present. This mechanism can be
extended to DT properties if needed for any non-discoverable h/w feature.
Rob
Rob Herring (3):
ARM: sched_clock: allow changing to higher frequency counter
ARM: sched_clock: support 64-bit counters
ARM: arch_timer: use the 64-bit sched_clock setup
arch/arm/include/asm/sched_clock.h | 1 +
arch/arm/kernel/arch_timer.c | 8 +-------
arch/arm/kernel/sched_clock.c | 35 ++++++++++++++++++++++++++++++++---
3 files changed, 34 insertions(+), 10 deletions(-)
--
1.7.10.4
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