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Add the initial support for the S3C64XX based systems to use
suspend-to-RAM to sleep.
Includes basic debugging for use with the SMDK6410 usign the
LEDs on the baseboard.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Add the facility to save the UART UDIVSLOT register if the UART
state is being saved over suspend.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Add a simple debug message on saving the UART state and add a per-arch
pre-restore function to be used by the s3c64xx restore code to ensure
the UARTs control registers do not go through any illegal state changes.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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As noted by Russell King, the sleep code path is not
elegant and makes use of leaving items on the stack
between calls.
Change the code that does the following:
if (s3c_cpu_save(regs_save) == 0) {
flush_cache_all();
S3C_PMDBG("preparing to sleep\n");
pm_cpu_sleep();
}
to simply call s3c_cpu_save, and let that do the
necessary calls to quiesce and sleep the system.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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The PM CRC checking code kmallocs an area to save a set of
CRC values during suspend. This triggers a warning due to the
call of a function that might sleep whilst the system is not
in a valid state to do so.
Move the allocation and free to points in the suspend and resume
process where they can call a function that might-sleep.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Change the way the UART state is saved over suspend to allow the s3c64xx
code to modify the settings on resume to avoid any illegal state changes
to the UART clocks. This will also allow us to save the UDIVSLOT register
on newer SoCs.
Move to using a structure for the UART use the extant Kconfig configuration
specifying the number of UARTs.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Rename s3c2410_cpu_resume to s3c_cpu_resume and s3c2410_cpu_save to
s3c_cpu_save to remove the CPU specific naming of these functions
which are now in the generic PM code.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Since we have moved a large proportion of the PM code to the common
support area, remove the cpu specific name from the initialisation
function.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Move the IRQ_EINT sleep control to be available to all
s3c impelmentations. Since s3c_irqext_wake is not large,
place it in arch/arm/plat-s3c/pm.c as adding it to a new
file would be a waste of compile time.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Move parts of the core and debug suspend code into the
plat-s3c for use with the new s3c64xx code.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Start moving the PM code by moving all the common support functions
to a common location in arch/arm/plat-s3c. With the move we rename
the functions from s3cxxx_ to s3c_ to fit the new location.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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