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authorSteven King <sfking@fdwdc.com>2010-01-20 13:49:44 -0700
committerGrant Likely <grant.likely@secretlab.ca>2010-01-20 13:49:44 -0700
commit34b8c66173666025020e3a6f8d4a5c238b19cde5 (patch)
tree00680c39dde5cefa549028532347902d9f714b4c /drivers/spi/Makefile
parent631e61b7ca12ef14c834f99f8948e410c539f585 (diff)
downloadvexpress-lsk-34b8c66173666025020e3a6f8d4a5c238b19cde5.tar.gz
spi: Add Freescale/Motorola Coldfire QSPI driver
Add support for the QSPI controller found some on Freescale/Motorola Coldfire MCUs. Full duplex, active high cs, spi modes 0-3 and word sizes 8-16 bits are supported. The hardware drives the MISO, MOSI and SCLK lines, but the chip selects are managed via GPIO and must be configured by the board code. The QSPI controller has an 80 byte buffer which allows us to transfer up to 16 words at a time. For transfers longer than 16 words, we split the buffer in half so we can update in one half while the controller is operating on the other half. Interrupt latencies then ultimately limits our sustained thru-put to something less than half the maximum speed supported by the part. Signed-off-by: Steven King <sfking@fdwdc.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/Makefile')
-rw-r--r--drivers/spi/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 84b490fb7f8..d3a65ab8ebb 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_SPI_BFIN) += spi_bfin5xx.o
obj-$(CONFIG_SPI_BITBANG) += spi_bitbang.o
obj-$(CONFIG_SPI_AU1550) += au1550_spi.o
obj-$(CONFIG_SPI_BUTTERFLY) += spi_butterfly.o
+obj-$(CONFIG_SPI_COLDFIRE_QSPI) += coldfire_qspi.o
obj-$(CONFIG_SPI_DAVINCI) += davinci_spi.o
obj-$(CONFIG_SPI_DESIGNWARE) += dw_spi.o
obj-$(CONFIG_SPI_DW_PCI) += dw_spi_pci.o