[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-09 05:34:19 +08:00
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#
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# Makefile for kernel SPI drivers.
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#
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2010-09-25 03:17:32 +08:00
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ccflags-$(CONFIG_SPI_DEBUG) := -DDEBUG
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-09 05:34:19 +08:00
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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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2011-06-06 15:16:30 +08:00
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obj-$(CONFIG_SPI_SPIDEV) += spidev.o
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-09 05:34:19 +08:00
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# SPI master controller drivers (bus)
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2011-06-06 15:16:30 +08:00
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obj-$(CONFIG_SPI_ALTERA) += spi-altera.o
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obj-$(CONFIG_SPI_ATMEL) += spi-atmel.o
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obj-$(CONFIG_SPI_ATH79) += spi-ath79.o
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obj-$(CONFIG_SPI_AU1550) += spi-au1550.o
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obj-$(CONFIG_SPI_BFIN) += spi-bfin5xx.o
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obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o
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obj-$(CONFIG_SPI_BITBANG) += spi-bitbang.o
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obj-$(CONFIG_SPI_BUTTERFLY) += spi-butterfly.o
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obj-$(CONFIG_SPI_COLDFIRE_QSPI) += spi-coldfire-qspi.o
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obj-$(CONFIG_SPI_DAVINCI) += spi-davinci.o
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obj-$(CONFIG_SPI_DESIGNWARE) += spi-dw.o
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obj-$(CONFIG_SPI_DW_MMIO) += spi-dw-mmio.o
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obj-$(CONFIG_SPI_DW_PCI) += spi-dw-midpci.o
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spi-dw-midpci-objs := spi-dw-pci.o spi-dw-mid.o
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obj-$(CONFIG_SPI_EP93XX) += spi-ep93xx.o
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obj-$(CONFIG_SPI_FSL_LIB) += spi-fsl-lib.o
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obj-$(CONFIG_SPI_FSL_ESPI) += spi-fsl-espi.o
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obj-$(CONFIG_SPI_FSL_SPI) += spi-fsl-spi.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_MPC512x_PSC) += spi-mpc512x-psc.o
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obj-$(CONFIG_SPI_MPC52xx_PSC) += spi-mpc52xx-psc.o
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obj-$(CONFIG_SPI_MPC52xx) += spi-mpc52xx.o
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obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o
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obj-$(CONFIG_SPI_OC_TINY) += spi-oc-tiny.o
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obj-$(CONFIG_SPI_OMAP_UWIRE) += spi-omap-uwire.o
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obj-$(CONFIG_SPI_OMAP_100K) += spi-omap-100k.o
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obj-$(CONFIG_SPI_OMAP24XX) += spi-omap2-mcspi.o
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obj-$(CONFIG_SPI_ORION) += spi-orion.o
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obj-$(CONFIG_SPI_PL022) += spi-pl022.o
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obj-$(CONFIG_SPI_PPC4xx) += spi-ppc4xx.o
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obj-$(CONFIG_SPI_PXA2XX) += spi-pxa2xx.o
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obj-$(CONFIG_SPI_PXA2XX_PCI) += spi-pxa2xx-pci.o
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2012-03-07 13:46:25 +08:00
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obj-$(CONFIG_SPI_RSPI) += spi-rspi.o
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2011-06-06 15:16:30 +08:00
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obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o
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spi-s3c24xx-hw-y := spi-s3c24xx.o
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spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o
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obj-$(CONFIG_SPI_S3C64XX) += spi-s3c64xx.o
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obj-$(CONFIG_SPI_SH) += spi-sh.o
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2012-03-02 09:10:17 +08:00
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obj-$(CONFIG_SPI_SH_HSPI) += spi-sh-hspi.o
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2011-06-06 15:16:30 +08:00
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obj-$(CONFIG_SPI_SH_MSIOF) += spi-sh-msiof.o
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obj-$(CONFIG_SPI_SH_SCI) += spi-sh-sci.o
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obj-$(CONFIG_SPI_STMP3XXX) += spi-stmp.o
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obj-$(CONFIG_SPI_TEGRA) += spi-tegra.o
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obj-$(CONFIG_SPI_TI_SSP) += spi-ti-ssp.o
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obj-$(CONFIG_SPI_TLE62X0) += spi-tle62x0.o
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obj-$(CONFIG_SPI_TOPCLIFF_PCH) += spi-topcliff-pch.o
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obj-$(CONFIG_SPI_TXX9) += spi-txx9.o
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obj-$(CONFIG_SPI_XILINX) += spi-xilinx.o
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2009-12-15 14:20:24 +08:00
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