diff options
| author | Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> | 2010-02-15 10:03:33 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-02-15 10:03:33 -0800 |
| commit | c8c99699bd25d8b238ba75d2530d1be90e3c39ea (patch) | |
| tree | 50d4b5fa730c3f1a77c96ebb4abd7593c0fcb7e0 /arch/arm/plat-omap/include/plat/mcbsp.h | |
| parent | 8ea3200f1de1c3d8f3c884a704107fb1e7449547 (diff) | |
omap: McBSP: Introduce caching in register write operations
Determine cache size required per McBSP port at init time, based on
processor type running on.
Allocate space for storing cached copies of McBSP register values at
port request.
Modify omap_msbcp_write() function to update the cache with every
register write operation.
Modify omap_mcbsp_read() to support reading from cache or hardware.
Update MCBSP_READ() macro for modified omap_mcbsp_read() function API.
Introduce a new macro that reads from the cache.
Tested on OMAP1510 based Amstrad Delta using linux-omap for-next, commit
fb7380d70e041e4b3892f6b19dff7efb609d15a4 (2.6.33-rc3+ dated 2010-01-11).
Compile-tested with: omap_perseus2_730_defconfig, omap_generic_1610_defconfig,
omap_generic_2420_defconfig, omap_2430sdp_defconfig, omap_3430sdp_defconfig,
omap_4430sdp_defconfig with CONFIG_OMAP_MCBSP=y selected.
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/include/plat/mcbsp.h')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/mcbsp.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/include/plat/mcbsp.h b/arch/arm/plat-omap/include/plat/mcbsp.h index d93fa44b1c9a..4df957b1d252 100644 --- a/arch/arm/plat-omap/include/plat/mcbsp.h +++ b/arch/arm/plat-omap/include/plat/mcbsp.h @@ -414,9 +414,10 @@ struct omap_mcbsp { u16 max_tx_thres; u16 max_rx_thres; #endif + void *reg_cache; }; extern struct omap_mcbsp **mcbsp_ptr; -extern int omap_mcbsp_count; +extern int omap_mcbsp_count, omap_mcbsp_cache_size; int omap_mcbsp_init(void); void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config, |