On Fri, 2011-03-18 at 18:54 +0530, Subhash Jadavani wrote: > On recent MSMs, ADM (Data Mover) HW is not present > which means existing SDCC driver can perform data > transfer in PIO (peripheral IO) mode only. > But PIO mode requires lot of CPU attention which > would mean consuming extra CPU MIPS. > > As a replacement on these recent MSMs, there is > a new DMA HW engine named SPS-BAM (as part of > Smart Peripheral System of MSM) is added for > data movement between SDCC core and system memory. > > This patch has done changes in existing MSM SDCC > driver for using SPS-BAM as DMA engine. 1300+ lines of code might warrant more of a description .. In the subject you say "DMA engine" but does this use drivers/dma/dmaengine.c ? > Signed-off-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx> > --- > drivers/mmc/host/Kconfig | 10 + > drivers/mmc/host/Makefile | 1 + > drivers/mmc/host/msm_sdcc.c | 929 +++++++++++++++++++++++++++++++++++++-- > drivers/mmc/host/msm_sdcc.h | 47 ++ > drivers/mmc/host/msm_sdcc_dml.c | 303 +++++++++++++ > drivers/mmc/host/msm_sdcc_dml.h | 120 +++++ > 6 files changed, 1374 insertions(+), 36 deletions(-) > create mode 100644 drivers/mmc/host/msm_sdcc_dml.c > create mode 100644 drivers/mmc/host/msm_sdcc_dml.h I'd do at least two patches. One that adds msm_sdcc_dml.[ch] and one that modifies msm_sdcc.[ch] and the Kconfig and Makefile. Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
