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8051effcbc
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>
52 lines
1.7 KiB
Makefile
52 lines
1.7 KiB
Makefile
#
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# Makefile for kernel SPI drivers.
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#
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ifeq ($(CONFIG_SPI_DEBUG),y)
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EXTRA_CFLAGS += -DDEBUG
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endif
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# small core, mostly translating board-specific
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# config declarations into driver model code
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obj-$(CONFIG_SPI_MASTER) += spi.o
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# SPI master controller drivers (bus)
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obj-$(CONFIG_SPI_ATMEL) += atmel_spi.o
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obj-$(CONFIG_SPI_BFIN) += spi_bfin5xx.o
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obj-$(CONFIG_SPI_BITBANG) += spi_bitbang.o
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obj-$(CONFIG_SPI_AU1550) += au1550_spi.o
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obj-$(CONFIG_SPI_BUTTERFLY) += spi_butterfly.o
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obj-$(CONFIG_SPI_GPIO) += spi_gpio.o
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obj-$(CONFIG_SPI_IMX) += spi_imx.o
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obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o
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obj-$(CONFIG_SPI_PXA2XX) += pxa2xx_spi.o
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obj-$(CONFIG_SPI_OMAP_UWIRE) += omap_uwire.o
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obj-$(CONFIG_SPI_OMAP24XX) += omap2_mcspi.o
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obj-$(CONFIG_SPI_ORION) += orion_spi.o
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obj-$(CONFIG_SPI_PL022) += amba-pl022.o
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obj-$(CONFIG_SPI_MPC52xx_PSC) += mpc52xx_psc_spi.o
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obj-$(CONFIG_SPI_MPC52xx) += mpc52xx_spi.o
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obj-$(CONFIG_SPI_MPC8xxx) += spi_mpc8xxx.o
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obj-$(CONFIG_SPI_PPC4xx) += spi_ppc4xx.o
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obj-$(CONFIG_SPI_S3C24XX_GPIO) += spi_s3c24xx_gpio.o
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obj-$(CONFIG_SPI_S3C24XX) += spi_s3c24xx.o
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obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
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obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
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obj-$(CONFIG_SPI_XILINX_OF) += xilinx_spi_of.o
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obj-$(CONFIG_SPI_XILINX_PLTFM) += xilinx_spi_pltfm.o
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obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o
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obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o
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obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
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# ... add above this line ...
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# SPI protocol drivers (device/link on bus)
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obj-$(CONFIG_SPI_SPIDEV) += spidev.o
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obj-$(CONFIG_SPI_TLE62X0) += tle62x0.o
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# ... add above this line ...
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# SPI slave controller drivers (upstream link)
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# ... add above this line ...
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# SPI slave drivers (protocol for that link)
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# ... add above this line ...
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