Change the way McBSP registers are maintained: store values written to the
device in a cache in order to make use of those cached values when
convenient.
This could help for developing the McBSP context save/restore features, as
well as solve the problem of possible register corruption, experienced on
OMAP1510 based Amstrad Delta board at least.
Series created against linux-omap for-next, commit
fb7380d70e041e4b3892f6b19dff7efb609d15a4 (2.6.33-rc3+ dated 2010-01-11).
All patches tested on OMAP1510 based Amstrad Delta and compile-tested using
omap_3430sdp_defconfig at least.
Latest changes:
- patch 3: allow for using the mcbsp->free as a guard for cache access,
adpot for fixed error handling in omap_mcbsp_request().
- patch 5: dropped
- all: refresh against latest l-o for-next tree.
Janusz Krzysztofik (4):
OMAP: McBSP: Use macros for all register read/write operations
OMAP: McBSP: Modify macros/functions API for easy cache access
OMAP: McBSP: Introduce caching in register write operations
OMAP: McBSP: Use cache when modifying individual register bits
arch/arm/mach-omap1/mcbsp.c | 16 -
arch/arm/mach-omap2/mcbsp.c | 20 +
arch/arm/plat-omap/include/plat/mcbsp.h | 3
arch/arm/plat-omap/mcbsp.c | 480
++++++++++++++++----------------
4 files changed, 278 insertions(+), 241 deletions(-)
Thanks,
Janusz
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