The customers may want to adjust the whole PLL and dividers according to
different user scenerios, and this causes the parent clock of sirf clocksource
not be divided exactly by the current hard-coded 1MHz clock rate.
This patch removes the hard-coded rate and makes the clocksource driver more
adaptive to the external changes.
Signed-off-by: NYanchang Li <yl22@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

According to HW spec, we have to disable the counter before setting
it, if we don't this, in pressure test, sometimes the timer might
not generate interrupt any more.

And this patch also fixes a typo for register set by changing 0x7
to 0x3. 0x7 is loop mode in HW, but here we are using oneshot 0x3.
Signed-off-by: NHao Liu <Hao.Liu@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

In the clocksource driver, we didn't explicitly enable the clock. it makes the
clk reference counter wrong. We didn't encounter any hang issue because the
tick's clock input has been open and is shared by some other hardware
components, but if we don't enable those components in kernel, in the stage of
disabling unused clk in kernel boot, Linux tick hangs.

This patch fixes it. it does an explicit prepare and enable to the clock input,
and increases the usage counter of the clk.
Signed-off-by: NZhiwu Song <Zhiwu.Song@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

irqchip will reject the affinity set to CPUs which is not online
yet. but in the CPU1 wakeup stage, OS only sets CPU1 to be online
after local timer is set, so that causes the irq_set_affinity not
work. this patch moves to irq_force_affinity() for the low level
boot stage.
Signed-off-by: NZhiwu Song <Zhiwu.Song@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

Nobody want to know the connection between io clk and timer clk,
so exposing this information to timer module is not reasonable.
this patch moves to define the timers' clk in dt.
Signed-off-by: NZhiwu Song <Zhiwu.Song@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>

Since CSR SiRF was converted to multi platform in cf82e0e4 (ARM: sirf:
enable multiplatform support) the symbol CLOCK_TICK_RATE isn't the
platform specific definition any more, but a global dummy value. There
was no harm introduced in cf82e0e4 because the global value happens to
match the old platform specific one, still this dummy value isn't
intended to be used and will hopefully disappear soon, so introduce a
local #define and use that instead.
Acked-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>

The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

This removes all the drivers/clocksource and drivers/irqchip uses of
the __cpuinit macros from all C files.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Separate the marco local timers from the local timer API. This
will allow us to remove ARM local timer support in the near future
and gets us closer to moving this driver to drivers/clocksource.
Acked-by: NMarc Zyngier <marc.zyngier@arm.com>
Cc: Barry Song <baohua.song@csr.com>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>

Nothing about the sched_clock implementation in the ARM port is
specific to the architecture. Generalize the code so that other
architectures can use it by selecting GENERIC_SCHED_CLOCK.
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
[jstultz: Merge minor collisions with other patches in my tree]
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>

This moves the two sirf clocksource drivers to drivers/clocksource
and integrates them into the framework for locating the clock sources
automatically.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Tested-by: NBarry Song <Baohua.Song@csr.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>

this patch adds tick timer, smp entries and generic DT machine
for SiRFmarco dual-core SMP chips.

with the added marco, we change the defconfig, using the same
defconfig, we get a zImage which can work on both prima2 and
marco.
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Cc: Mark Rutland <mark.rutland@arm.com>