diff options
| author | Magnus Damm <damm@opensource.se> | 2009-11-26 11:10:05 +0000 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2009-12-13 00:48:27 -0700 |
| commit | 8051effcbced8478119167b93b0e9554cb82d28e (patch) | |
| tree | 03ce88851ca697c8ed5f1d8eadcb32972342dbac /drivers/spi/Makefile | |
| parent | 41df70d9ac2d0d36b23a0ec4866f67e540f366ff (diff) | |
spi: SuperH MSIOF SPI Master driver V2
This patch is V2 of SPI Master support for the SuperH MSIOF.
Full duplex, spi mode 0-3, active high cs, 3-wire and lsb
first should all be supported, but the driver has so far
only been tested with "mmc_spi".
The MSIOF hardware comes with 32-bit FIFOs for receive and
transmit, and this driver simply breaks the SPI messages
into FIFO-sized chunks. The MSIOF hardware manages the pins
for clock, receive and transmit (sck/miso/mosi), but the chip
select pin is managed by software and must be configured as
a regular GPIO pin by the board code.
Performance wise there is still room for improvement, but
on a Ecovec board with the built-in sh7724 MSIOF0 this driver
gets Mini-sd read speeds of about half a megabyte per second.
Future work include better clock setup and merging of 8-bit
transfers into 32-bit words to reduce interrupt load and
improve throughput.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/Makefile')
| -rw-r--r-- | drivers/spi/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 2f2bebc63b64..9c51e2526892 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -35,6 +35,7 @@ obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o obj-$(CONFIG_SPI_XILINX_OF) += xilinx_spi_of.o obj-$(CONFIG_SPI_XILINX_PLTFM) += xilinx_spi_pltfm.o obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o +obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o # ... add above this line ... |