This patch restores serial port operation which has been broken since
commit 60e93575 ("serial: samsung: enable clock before clearing
pending interrupts during init")

That commit only uncovered the real issue which was missing clkdev
entries for the "uart" clocks on S3C2440. It went unnoticed so far
because return value of clk API calls were not being checked at all
in the samsung serial port driver.

This patch should be backported to at least 3.10 stable kernel, since
the serial port has not been working on s3c2440 since 3.10-rc5.

Cc: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: NSylwester Nawrocki <sylvester.nawrocki@gmail.com>
[on S3C2440 SoC based Mini2440 board]
Tested-by: NSylwester Nawrocki <sylvester.nawrocki@gmail.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Tested-by: NJuergen Beisert <jbe@pengutronix.de>
Cc: <stable@vger.kernel.org>	[3.10]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

s3c2443_common_setup_clocks is always called through
s3c2443_common_init_clocks, so there is no need to call it separately.
It was also called twice through this separate call.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

plat-samsung/clock.h currently keeps all the SoC specific clock
declarations. As we want to get rid of s3c2410.h altogether, move
the s3c2410_baseclk_add there too.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

plat-samsung/clock.h currently keeps all the SoC specific clock
declarations except the ones for S3C2443/S3C2416 which were kept in
s3c2443.h.

This patch moves them out of s3c2443.h to get rid of the header
completely later on.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The plat/clock.h revised to prevent declaring duplicated.
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

clkdev framework uses global mutex to protect clock tree, so it is not
possible to call clk_get() in interrupt context. This patch fixes this
issue and makes system reset by watchdog call working again.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The struct clk definition for Samsung platforms is extended to include
a instance of struct clk_lookup and a device name. When clocks are
registered using s3c24xx_register_clock function, the dev_id, con_id
and clk members are initialized with information from the struct clk
instance and struct clk_lookup member is registered.
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>

This patch adds support for clock information exposed to debug-fs interface.
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
[kgene.kim@samsung.com: removed useless empty lines]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This adds the xusbxti clock to S3C64XX platform.
Signed-off-by: NMaurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add s3c_disable_clocks() and change the clock registration code to use
the s3c_register_clocks() followed by s3c_disable_clocks() instead of
the loops it was using.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Turn the init sequence of
	s3c24xx_register_baseclocks(xtal);
	s3c64xx_register_clocks();
	s3c6400_register_clocks(S3C6410_CLKDIV0_ARM_MASK);

into a single call as this is now contained within one file.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

This patch adds clock and pll support for S5P6440. This patch are based on
Harald Welte's patches and Ben's plat-samsung.
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

This patch makes clk_default_setrate and clk_ops_def_setrate available
to code outside plat-samsung clock code.
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add s3c_register_clocks() to register an array of clocks, printing
an error message if there is a problem. Replace all points in the code
where this could be used.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Reduce the size of struct clk by 12 bytes and make defining clocks with
common implementation functions easier by moving the set_rate, get_rate,
round_rate and set_parent calls into a new structure called 'struct clk_ops'
and using that instead.

This change does make a few clocks larger as they need their own clk_ops,
but this is outweighed by the number of clocks with either no ops or having
a common set of ops.

Update all the users of this.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move the <plat/clock.h> header to plat-samsung where it can be used by all
the platforms, and readies it for the next round of clock updates where
the clock code will be amalgamated.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add doubled HCLK to S3C64xx.
Signed-off-by: NWerner Almesberger <werner@openmoko.org>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

The S3C64XX timer is running at the wrong rate due to the
assumptions made in the timer initialisation about the way
the pwm dividers work. This means that time on the S3C64XX
runs twice as fast as it should.

Fix the problem by moving to using the clk framework to setup
the pwm timer clock muxes, as the pwm-clock code has all the
necessary knowledge of how the timer clock inputs are routed.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add the PLL clock initialisation and clock registration
and include the clocks sourced via CLKDIVx for most of
the on-chip peripherals.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add the initial clocks definitions for the s3c6400
and s3c6410. Move the epll and ext clock from the
s3c2443 support into the common code.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move clock.h, cpu.h and devs.h to plat-s3c for use
with the s3c64xx support.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Update the clock settings on resume for suspend/resume
support so that if the boot loader changes anything or
the system's PLL is reset then we return with the correct
settings.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

We cannot sleep if we have cpufreq pm enabled during some
of the clock operations, so change to use a spinlock to
protect the clock system.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Continue moving the include files into arch/arm
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Remove the clocks from the s3c24xx_board as part
of the process of simplifying the initialisation
sequence by removing struct s3c24xx_board.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The following patch and script moves the arch/arm/mach-s3c2410
directory into arch/arm/plat-s3c24xx for the generic core code
and inti arch/arm/mach-s3c{cpu} for the cpu/machine support files

Include directory include/asm-arm/plat-s3c24xx is added for the
core include files.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Update the clocks with the MPLL clock, and
use it as the parent. Also export these to
the rest of arch/arm/mach-s3c2410
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Add a get_rate call to allow an given clock
to over-ride the clk_get_rate() call.

This provides support for clocks which rely on
division of their parent to correctly report
their frequency when the parent can also change.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Split the s3c2410 specific clocks from the core
clock code, as part of the work to support more
of the Samsung line of SoCs.

The patch does not use the sysdev mechanism as
the clocks are needed for the timer init, which
is very early in the kernel init sequence.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Add USB bus clock definition for 48MHz fed to OHCI and gadget cores
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Add support for clk_set_rate and clk_round_rate to the
s3c2410 clock implementation
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Add clk_set_parent() call to clock code
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Move to using an enable count for the shared clocks
and protect the clock system using a mutex instead
of just disabling IRQs during the clock update.

Since there is little more code in the path for
non-shared clocks, the enable and disable calls
use the same code for each.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

It seems that clk_use() and clk_unuse() are additional complexity
which isn't required anymore.  Remove them from the clock framework
to avoid the additional confusion which they cause, and update all
ARM machine types except for OMAP.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!