This patch remove the hardcoded link between local timers and PPIs,
and convert the PPI users (TWD, MCT and MSM timers) to the new
*_percpu_irq interface. Also some collateral cleanup
(local_timer_ack() is gone, and the interrupt handler is strictly
private to each driver).

PPIs are now useable for more than just the local timers.

Additional testing by David Brown (msm8250 and msm8660) and
Shawn Guo (imx6q).

Cc: David Brown <davidb@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: NDavid Brown <davidb@codeaurora.org>
Tested-by: NDavid Brown <davidb@codeaurora.org>
Tested-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

The DGT runs at 27 MHz divided by 4 on 8660 and 8960.
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>

Some msm targets have timers whose lower bits are unreliable. So, we
present our timers as lower frequency than they actually are, and ignore
the bottom 5 bits on such targets. This compensation was erroneously
removed from the msm_read_timer_count function, so restore it.

This was broken by 94790ec2 "msm: timer: SMP timer support for msm".
Signed-off-by: NJeff Ohlstein <johlstei@codeaurora.org>

Fix build breakage on SMP=y builds due to 0f7b332f (ARM:
consolidate SMP cross call implementation, 2011-04-03)

arch/arm/mach-msm/timer.c: In function 'local_timer_setup':
arch/arm/mach-msm/timer.c:295: error: implicit declaration of
function 'gic_enable_ppi'
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>

Change af90f10d "ARM: 6759/1: smp: Select local timers vs broadcast
timer support runtime" missed a return statement, causing a compile
warning:

  arch/arm/mach-msm/timer.c:272: warning: 'return' with no value, in
  function returning non-void

Trivially return 0 for success when running on cpu 0 (to match the
comment and previous behavior).
Signed-off-by: NDavid Brown <davidb@codeaurora.org>

The current code support of dummy timers in absence of local
timer is compile time. This is an attempt to convert it to runtime
so that on few SOC version if the local timers aren't supported
kernel can switch to dummy timers. OMAP4430 ES1.0 does suffer from
this limitation.

This patch should not have any functional impact on affected
files.

Cc: Daniel Walker <dwalker@codeaurora.org>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Colin Cross <ccross@android.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Modify the macros in the MSM timer driver to support the
MSM8960 chip.
Signed-off-by: NStepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>

Allow the timer register to be determined dynamically instead of at
compile time.  Use common virtual addresses for the registers across
all MSM chips, and select the register mappings based on the detected
CPU.
Signed-off-by: NDavid Brown <davidb@codeaurora.org>

The msm provides timer hardware that is private to each core. Each
timer has separate counter and match registers, so we create separate
clock_event_devices for each core. For the global clocksource, use
cpu 0's counter.
Signed-off-by: NJeff Ohlstein <johlstei@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>

In d7e81c26 (clocksource: Add clocksource_register_hz/khz interface) new
interfaces were added which simplify (and optimize) the selection of the
divisor shift/mult constants.  Switch over to using this new interface.
Tested-By: NJeff Ohlstein <johlstei@codeaurora.org>
Acked-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The shift of 24 causes the shift and multiply operation to sometimes
overflow, resulting in incorrect timer values and poor performance.
Signed-off-by: NJeff Ohlstein <johlstei@codeaurora.org>
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>

Signed-off-by: NJeff Ohlstein <johlstei@codeaurora.org>
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>

Some SoC need to redefine MSM_DGT_BASE from it's default.
This allows it to be defined in a header to override the
default value.
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>

Pass clocksource pointer to the read() callback for clocksources.  This
allows us to share the callback between multiple instances.

[hugh@veritas.com: fix powerpc build of clocksource pass clocksource mods]
[akpm@linux-foundation.org: cleanup]
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Acked-by: NJohn Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Impact: change calling convention of existing clock_event APIs

struct clock_event_timer's cpumask field gets changed to take pointer,
as does the ->broadcast function.

Another single-patch change.  For safety, we BUG_ON() in
clockevents_register_device() if it's not set.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Cc: Ingo Molnar <mingo@elte.hu>

- Add some more peripherals (sdcc, etc) to the iomap.
- Remove virtual base addresses for devices that we should be passing
  physical addresses to drivers via resources and ioremap()ing.
- don't try to use uarts for ll debug once the mmu is enabled due to
  problems with the peripheral window
- make base addresses void __iomem * and fixup irq.c and timer.c
- Remove common.c and bring in devices.c/devices.h similar to
  the PXA architecture.
Signed-off-by: NBrian Swetland <swetland@google.com>

Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This just leaves include/asm-arm/plat-* to deal with.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

- Vectored Interrupt Controller support
- Timer support using the GPT and DGT timers
Signed-off-by: NBrian Swetland <swetland@google.com>