Colin Cross 128f79c82d [ARM] twd: Allow twd rescaling to match cpu frequency ...

The clock to the ARM TWD local timer scales with the cpu
frequency.  To allow the cpu frequency to change while
maintaining a constant TWD frequency, pick a lower target
frequency for the TWD and use the prescaler to divide down
to the closest lower frequency.

This patch provides a new initialization function that takes
a target TWD frequency and the relation between the cpu
clock and the TWD clock, required to be an integer divider
>= 2 by the ARM spec.  It also provides a function to be
called from cpufreq drivers to set the prescaler whenever
the cpu frequency changes.

Also fixes a typo in the printk of the calibrated frequency.

Change-Id: I3fa8ef718ff5518170f1b2bab29efe960741853e
Signed-off-by: Colin Cross <ccross@google.com>

2010-10-06 16:27:39 -07:00

..

hardware

Add "nol2x0" early param to avoid initialisation of the L2 controller

2010-10-06 16:26:32 -07:00

mach

Merge branch 'devel-stable' into devel

2010-07-31 14:20:16 +01:00

a.out-core.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

a.out.h

headers_check fix: arm, a.out.h

2009-02-01 11:01:22 +05:30

asm-offsets.h

kbuild: move asm-offsets.h to include/generated

2009-12-12 13:08:14 +01:00

assembler.h

ARM: fix build error in arch/arm/kernel/process.c

2010-04-21 08:45:21 +01:00

atomic.h

ARM: 6212/1: atomic ops: add memory constraints to inline asm

2010-07-09 11:29:35 +01:00

auxvec.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

bitops.h

ARM: boolean bit testing

2009-10-11 16:25:06 +01:00

bitsperlong.h

asm-generic: introduce asm/bitsperlong.h

2009-06-11 21:02:14 +02:00

bug.h

[ARM] 5211/2: fix a couple warnings from BUG() usage

2008-09-01 12:06:27 +01:00

bugs.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

byteorder.h

byteorder: make swab.h include asm/swab.h like a regular header

2009-01-14 19:56:50 -08:00

cache.h

dma-mapping: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN

2010-08-11 08:59:21 -07:00

cacheflush.h

ARM: 6112/1: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMP

2010-05-08 10:44:30 +01:00

cachetype.h

[ARM] Introduce new bitmask based cache type macros

2008-09-25 15:35:28 +01:00

checksum.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

clkdev.h

ARM: 6001/1: removing compilation warning comming from clkdev.h

2010-03-29 17:33:32 +01:00

cpu-multi32.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

cpu-single.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

cpu.h

ARM: 5872/1: ARM: include needed linux/cpu.h in asm/cpu.h

2010-01-10 13:03:52 +00:00

cputime.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

cputype.h

Merge branch 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel

2009-09-21 16:02:30 +01:00

current.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

delay.h

[ARM] Add ARCH_PROVIDES_UDELAY config option

2010-10-06 16:26:54 -07:00

device.h

Driver Core: Add platform device arch data V3

2009-07-22 00:28:38 +02:00

div64.h

[ARM] 5320/1: fix assembly constraints in implementation of do_div()

2008-10-23 12:53:32 +01:00

dma-mapping.h

Revert "[ARM] pxa: remove now unnecessary dma_needs_bounce()"

2010-09-08 12:28:39 +01:00

dma.h

ARM: 5870/1: arch/arm: Fix build failure for defconfigs without CONFIG_ISA_DMA_API set

2010-01-10 00:08:03 +00:00

domain.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

ecard.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

elf.h

ARM: 6189/1: Add support for the MOVW/MOVT relocations in Thumb-2

2010-08-05 10:35:46 +01:00

emergency-restart.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

entry-macro-vic2.S

ARM: Add common entry code for system with two VICs

2010-01-15 17:10:14 +09:00

errno.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

fb.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

fcntl.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

fiq.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

fixmap.h

[ARM] fixmap support

2009-03-15 21:01:20 -04:00

flat.h

flat: fix data sections alignment

2009-05-29 08:40:02 -07:00

floppy.h

[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach

2008-08-07 09:55:48 +01:00

fpstate.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

ftrace.h

Merge branch 'devel-stable' into devel

2009-09-12 12:02:26 +01:00

futex.h

ARM: fix build error in arch/arm/kernel/process.c

2010-04-21 08:45:21 +01:00

glue.h

ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()

2009-10-02 22:34:32 +01:00

gpio.h

[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach

2008-08-07 09:55:48 +01:00

hardirq.h

ARM: 6138/1: Add support for 10 hardirq bits

2010-05-20 23:51:07 +01:00

highmem.h

kmap_atomic: make kunmap_atomic() harder to misuse

2010-08-09 20:44:54 -07:00

hw_irq.h

[ARM] Fix circular include dependency with IRQ headers

2008-08-07 09:39:37 +01:00

hwcap.h

ARM: 6207/1: Replace CONFIG_HAS_TLS_REG with HWCAP_TLS and check for it on V6

2010-07-09 14:41:35 +01:00

ide.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

io.h

ARM: Add barriers to io{read,write}{8,16,32} accessors as well

2010-07-29 14:04:37 +01:00

ioctl.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

ioctls.h

tty: Add EXTPROC support for LINEMODE

2010-08-10 13:47:39 -07:00

ipcbuf.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

irq_regs.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

irq.h

ARM: 6197/2: preliminary support for sparse IRQ

2010-07-09 14:41:33 +01:00

irqflags.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

Kbuild

archs: replace unifdef-y with header-y

2010-08-14 22:26:51 +02:00

kdebug.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

kexec.h

ARM: 6117/1: kdump: implement crash_setup_regs()

2010-07-09 15:00:51 +01:00

kgdb.h

kgdb,arm: Individual register get/set for arm

2010-08-05 09:22:21 -05:00

kmap_types.h

kdb: core for kgdb back end (2 of 2)

2010-05-20 21:04:21 -05:00

kprobes.h

[ARM] 5206/1: remove kprobe_trap_handler() hack

2008-09-01 12:06:26 +01:00

leds.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

limits.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

linkage.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

local64.h

arch: Implement local64_t

2010-06-09 11:12:36 +02:00

local.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

localtimer.h

[ARM] smp: allow re-use of realview localtimer TWD support

2009-05-17 19:16:41 +01:00

locks.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

mach-types.h

arm: move mach-types to include/generated

2009-12-12 13:08:14 +01:00

mc146818rtc.h

[ARM] Convert asm/io.h to linux/io.h

2008-09-06 12:10:45 +01:00

memblock.h

ARM: Convert platform reservations to use LMB rather than bootmem

2010-07-27 08:48:23 +01:00

memory.h

Merge branch 'misc' into devel

2010-07-31 14:20:02 +01:00

mman.h

arm: add arch_mmap_check(), get rid of sys_arm_mremap()

2009-12-11 06:34:09 -05:00

mmu_context.h

ARM: 5905/1: ARM: Global ASID allocation on SMP

2010-02-15 21:39:51 +00:00

mmu.h

ARM: 5905/1: ARM: Global ASID allocation on SMP

2010-02-15 21:39:51 +00:00

module.h

[ARM] 5384/1: unwind: Add stack unwinding support for loadable modules

2009-02-19 11:27:19 +00:00

msgbuf.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

mtd-xip.h

[ARM] move asm/xip.h's mach/hardware.h include to mach/xip.h

2008-12-14 13:22:51 +00:00

mutex.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

nwflash.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

outercache.h

ARM: 5994/1: ARM: Add outer_cache_fns.sync function pointer (2/4)

2010-03-25 21:13:49 +00:00

page-nommu.h

nommu: Remove the memory_start/end variables from ARM page-nommu.h

2009-07-24 12:35:01 +01:00

page.h

ARM: Pass VMA to copy_user_highpage() implementations

2009-10-05 15:17:45 +01:00

param.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

parport.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

pci.h

ARM: 6058/1: Add support for PCI domains

2010-04-22 21:38:11 +01:00

percpu.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

perf_event.h

ARM: 6330/1: perf: reword comments relating to perf_event_do_pending

2010-09-01 10:06:08 +01:00

pgalloc.h

ARM: implement highpte

2009-08-17 20:02:06 +01:00

pgtable-hwdef.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

pgtable-nommu.h

ARM: 5988/1: pgprot_dmacoherent() for non-mmu builds

2010-03-13 10:48:22 +00:00

pgtable.h

ARM: 6383/1: Implement phys_mem_access_prot() to avoid attributes aliasing

2010-09-19 12:19:18 +01:00

pmu.h

ARM: 6064/1: pmu: register IRQs at runtime

2010-05-17 11:53:57 +01:00

poll.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

posix_types.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

proc-fns.h

ARM: Kill CONFIG_CPU_32

2009-12-18 16:07:53 +00:00

processor.h

ARM: 6194/1: change definition of cpu_relax() for ARM11MPCore

2010-07-01 10:13:52 +01:00

procinfo.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

ptrace.h

ARM: Tighten check for allowable CPSR values

2010-08-15 22:04:24 +01:00

resource.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

scatterlist.h

asm-generic: remove ARCH_HAS_SG_CHAIN in scatterlist.h

2010-05-27 09:12:54 -07:00

sections.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

segment.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

sembuf.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

serial.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

setup.h

ARM: Remove DISCONTIGMEM support

2010-07-16 10:57:35 +01:00

shmbuf.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

shmparam.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

sigcontext.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

siginfo.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

signal.h

asm-generic: rename termios.h, signal.h and mman.h

2009-06-11 21:01:52 +02:00

sizes.h

[ARM] Kirkwood: create a mapping for the Security Accelerator SRAM

2009-06-08 13:05:02 -04:00

smp_plat.h

ARM: Fix ptrace accesses

2009-12-14 14:54:28 +00:00

smp_scu.h

[ARM] smp: separate SCU support code from realview

2009-05-17 19:00:37 +01:00

smp_twd.h

[ARM] twd: Allow twd rescaling to match cpu frequency

2010-10-06 16:27:39 -07:00

smp.h

ARM: rename mach_cpu_disable() to platform_cpu_disable()

2010-05-15 15:03:51 +01:00

socket.h

net: Generalize socket rx gap / receive queue overflow cmsg

2009-10-12 13:26:31 -07:00

sockios.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

sparsemem.h

[ARM] mm: enable sparsemem on clps7500 and RiscPC

2008-10-01 17:24:04 +01:00

spinlock_types.h

locking: Convert raw_rwlock to arch_rwlock

2009-12-14 23:55:32 +01:00

spinlock.h

ARM: 5897/1: spinlock: don't use deprecated barriers on ARMv7

2010-02-15 21:39:50 +00:00

stackprotector.h

ARM: initial stack protector (-fstack-protector) support

2010-06-14 21:31:00 -04:00

stacktrace.h

[ARM] 5382/1: unwind: Reorganise the stacktrace support

2009-02-12 13:21:17 +00:00

stat.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

statfs.h

ARM: Use <asm-generic/statfs.h>

2008-09-04 09:46:11 +01:00

string.h

[ARM] remove memzero()

2008-11-27 12:37:59 +00:00

swab.h

ARM: 5772/1: Use REV and REV16 for byte swapping on ARMv6+

2009-10-25 15:59:53 +00:00

system.h

ARM: enable CONFIG_CPU_IDLE support

2010-10-03 23:08:57 -07:00

tcm.h

ARM: 5580/2: ARM TCM (Tightly-Coupled Memory) support v3

2009-09-15 22:11:05 +01:00

termbits.h

tty: Add EXTPROC support for LINEMODE

2010-08-10 13:47:39 -07:00

termios.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

therm.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

thread_info.h

add descriptive comment for TIF_MEMDIE task flag declaration.

2010-05-14 11:13:27 +02:00

thread_notify.h

ARM: Convert VFP/Crunch/XscaleCP thread_release() to exit_thread()

2009-12-18 14:53:41 +00:00

timex.h

[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach

2008-08-07 09:55:48 +01:00

tlb.h

mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()

2009-07-27 12:10:38 -07:00

tlbflush.h

ARM: 6299/1: errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID

2010-08-10 22:10:54 +01:00

tls.h

ARM: 6207/1: Replace CONFIG_HAS_TLS_REG with HWCAP_TLS and check for it on V6

2010-07-09 14:41:35 +01:00

topology.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

traps.h

[ARM] 5381/1: unwind: Reorganise the traps.c code

2009-02-12 13:21:15 +00:00

types.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

uaccess.h

ARM: fix build error in arch/arm/kernel/process.c

2010-04-21 08:45:21 +01:00

ucontext.h

ARM: 6051/1: VFP: preserve the HW context when calling signal handlers

2010-04-14 11:11:30 +01:00

unaligned.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

unified.h

Fix "W" macro in arch/arm/include/asm/unified.h

2009-09-18 23:30:11 +01:00

unistd.h

ARM: 6343/1: wire up fanotify and prlimit64 syscalls on ARM

2010-09-01 10:06:08 +01:00

unwind.h

[ARM] 5383/2: unwind: Add core support for ARM stack unwinding

2009-02-19 11:26:24 +00:00

user.h

ARM: 6051/1: VFP: preserve the HW context when calling signal handlers

2010-04-14 11:11:30 +01:00

vfp.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00

vfpmacros.h

ARM: 6203/1: Make VFPv3 usable on ARMv6

2010-07-09 14:41:34 +01:00

vga.h

[ARM] Convert asm/io.h to linux/io.h

2008-09-06 12:10:45 +01:00

xor.h

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02 21:32:35 +01:00