Commit Graph

11 Commits

Author SHA1 Message Date
Will Deacon d0a533b182 ARM: 7452/1: delay: allow timer-based delay implementation to be selected
This patch allows a timer-based delay implementation to be selected by
switching the delay routines over to use get_cycles, which is
implemented in terms of read_current_timer. This further allows us to
skip the loop calibration and have a consistent delay function in the
face of core frequency scaling.

To avoid the pain of dealing with memory-mapped counters, this
implementation uses the co-processor interface to the architected timers
when they are available. The previous loop-based implementation is
kept around for CPUs without the architected timers and we retain both
the maximum delay (2ms) and the corresponding conversion factors for
determining the number of loops required for a given interval. Since the
indirection of the timer routines will only work when called from C,
the sa1100 sleep routines are modified to branch to the loop-based delay
functions directly.

Tested-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-09 17:42:23 +01:00
Russell King f3bb3d7422 ARM: sa11x0: fix sleep entry
Sometimes, we get stuck while trying to enter sleep.  This seems
to occur if we do not have udelay() in the instruction cache. Avoid
this by requesting a short delay prior to modifying the SDRAM timings.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-09 15:34:11 +00:00
Russell King 34c79de6b2 ARM: pm: sa1100: move cpu_suspend into C code
We don't need a veneer for cpu_suspend, it can be called directly from
C code now.  Move it into sa11x0_pm_enter() along with the re-enabling
of clock switching.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-24 08:48:43 +01:00
Russell King e8856a8797 ARM: pm: convert cpu_suspend() to a normal function
cpu_suspend() has a weird calling method which makes it only possible to
call from assembly code: it returns with a modified stack pointer to
finish the suspend, but on resume, it 'returns' via a provided pointer.

We can make cpu_suspend() appear to be a normal function merely by
swapping the resume pointer argument and the link register.

Do so, and update all callers to take account of this more traditional
behaviour.

Acked-by: Frank Hofmann <frank.hofmann@tomtom.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-24 08:48:43 +01:00
Russell King 3125af241c ARM: pm: sa1100: no need to re-enable clock switching
This is now taken care of by calling cpu_proc_init() in the resume
path, so eliminate this unnecessary call.

Tested-by: Kevin Hilman <khilman@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-24 08:47:15 +01:00
Russell King 96c20015da ARM: pm: convert sa11x0 to generic suspend/resume support
Convert sa11x0 to use the generic CPU suspend/resume support, rather
than implementing its own version.  Tested on Assabet.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-22 17:11:24 +00:00
Kristoffer Ericson 93982535a2 [ARM] 5336/1: Formatting/Whitespace cleanups in mach-sa1100
This patch fixes bad formatting found in
mach-sa1100 files.

What it does is to replace/delete things like
excessive spaces (start || endline). The code
looks the same just alot less junk.

Signed-off-by: Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-12-01 17:22:45 +00:00
Russell King a09e64fbc0 [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
This just leaves include/asm-arm/plat-* to deal with.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:55:48 +01:00
Russell King be50972935 [ARM] Remove asm/hardware.h, use asm/arch/hardware.h instead
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h.
Then, since asm/hardware.h only exists to include asm/arch/hardware.h,
update everything to directly include asm/arch/hardware.h and remove
asm/hardware.h.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:40:08 +01:00
Russell King 801194e3bc [ARM] Remove MODE_(SVC|IRQ|FIQ|USR) and DEFAULT_FIQ
DEFAULT_FIQ was entirely unused.  MODE_* are just redefinitions
of *_MODE.  Use *_MODE instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-25 12:01:48 +01:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
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!
2005-04-16 15:20:36 -07:00