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Merge plat-s3c64xx/s3c6400-clock.c mach-s3c64xx/clock.c placing all the
clock code into one place.
Note, no effort is made in this patch to squash the init functions
together.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Move the register and GPIO definition files from plat-s3c64xx into the
machine include direcotry as they are unlikely to be reused outside
mach-s3c64xx.
This move includes removing the empty <mach/regs-clock.h> and replacing
it with the <plat/regs-clock.h> implementation.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The new code calls the clock setup code on registration which
can be before the clock system has been fully initialised. The
following code re-does this setup at the end of the clock
registration and thus we get two printings.
Update the calls to only print on the last pass or when doing
the necessary resume work.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Change these two fields to have named initialisers as per the
review comments from Kyungmin Park.
sed used:
s@\.reg_src\(.*\)=\(.*\){\(.*\),\(.*\),\(.*\)}@.reg_src\1=\2{ .reg =\3, .shift =\4, .size =\5 }@g
s@\.reg_div\(.*\)=\(.*\){\(.*\),\(.*\),\(.*\)}@.reg_div\1=\2{ .reg =\3, .shift =\4, .size =\5 }@g
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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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: Ben Dooks <ben-linux@fluff.org>
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Move the s3c6400-clock.c implementation over to use the new common
plat-samsung based clock-clksrc.c.
Note, this does not delete the clocks definitions that are now unused
in the regs-clock.h to reduce the quantity of change in this commit.
Based on original patches by Harald Welte.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The individually named clocks are all static to the code
and thus can be compressed into a single array and then
the array can be referenced. This removes the need for
a seperate array of pointers to clocks.
Fix a minor problem of re-initialising the pointers in
s3c6400_set_clksrc() as this is also called by the cpufreq
code. Move these initialisations to the code that does the
registration.
Based on Harald Welte's original clock changes patch.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Remove the four fields from clksrc_clk.clk which are always the same
and init them when the clock is registered. This helps remove the amount
of repeated code.
This is a re-work of Harald Welte's clock changes for the latest kernel.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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There is a possibility of a loop happening in the PLL output clock
chain on the S3C64XX series. clk_mpll's parent was set to be
clk_mout_mpll, but this is fed from clk_fout_epll (which is also
clk_mpll).
clk_mpll is meant to be the output from the MPLL, and clk_mout_mpll
is a seperate clock derived from the mux of clk_mpll and clk_fin_mpll
and thus should be considered a seperate clock.
Anything using clk_mpll directly really should not be relying on this
being the clock that is eventually routed to a peripheral, so remove the
loop and ensure that the clocks accurately represent the clock chain
in the device.
The clk_mpll is not being used outside of the s3c6400-clock.c code, so
this change should not break anything else.
Do the same for the EPLL.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The current code assumes that the external clock mux will be set to
the crystal. Set this up explicitly within the clock API.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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In s3c64xx_roundrate_clksrc function, the calculation is wrong. This
patch fixes this calculation.
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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This ensures the clock hierarchy data structures are updated when we
change the clock source in the actual hardware registers.
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
[ben-linux@fluff.org: Minor re-indentation of subject]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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In s3c64xx_setrate_clksrc() we used sclk->shift, but actually need to
use sclk->divider_shift to correctly calculate the value for the divider
register.
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
[ben-linux@fluff.org: Minor re-indentation of description]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The value of armclk_mask needs to be inverted for use as a mask on
the register value when updating ARM_RATIO.
This is critical for cpufreq support, without it attempts to scale
the frequency of the core trash pretty much the entire clock tree.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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If the requested clock is faster than the parent clock then the
parent clock is the closest we can get to the request so we need
to return that instead of the requested clock.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Add ARM clock to provide 'arm' from the APLL to the ARM core.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Add doubled HCLK to S3C64xx.
Signed-off-by: Werner Almesberger <werner@openmoko.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Add camera interface clock to S3C6410.
Signed-off-by: Werner Almesberger <werner@openmoko.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Some of the rate selection logic in s3c64xx_setrate_clksrc uses what
appears to be parent clock selection logic. This patch corrects it.
I also added a check for overly large dividers to prevent them from
changing unrelated clocks.
Signed-off-by: Werner Almesberger <werner@openmoko.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Fix the following sparse warnings in s3c6400-clock.c:
39:12: warning: symbol 'clk_ext_xtal_mux' was not declared. Should it be static?
66:12: warning: symbol 'clk_fout_apll' was not declared. Should it be static?
81:19: warning: symbol 'clk_mout_apll' was not declared. Should it be static?
91:12: warning: symbol 'clk_fout_epll' was not declared. Should it be static?
106:19: warning: symbol 'clk_mout_epll' was not declared. Should it be static?
126:19: warning: symbol 'clk_mout_mpll' was not declared. Should it be static?
148:12: warning: symbol 'clk_dout_mpll' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The clock list for the USB host bus clock was in the wrong order,
move clk_48m to position 0.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The usb-host-bus clock should be named usb-bus-host.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The clk_fout_epll clock wasn't registered as part of the initial clock
work, which can cause problems if it is used by one of the hardware
blocks.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Some of the startup output can be reduced to
KERN_DEBUG from KERN_INFO as it is only really
useful when trying to debug kernel initialisation
problems.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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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: Ben Dooks <ben-linux@fluff.org>
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