X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fspi%2FKconfig;h=83a185d52961e5075cd5330de7f770fc4eb28e79;hb=b2573eb586169dfb02772856a4e7cb760f21ec12;hp=b9d0efb6803f2919695c21ed6ba186303c51353c;hpb=62b3f981886b9b899eb0fc5fb59375f4512a1bd1;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index b9d0efb6803..83a185d5296 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -78,7 +78,7 @@ config SPI_AU1550
 	  will be called au1550_spi.
 
 config SPI_BITBANG
-	tristate "Bitbanging SPI master"
+	tristate "Utilities for Bitbanging SPI masters"
 	help
 	  With a few GPIO pins, your system can bitbang the SPI protocol.
 	  Select this to get SPI support through I/O pins (GPIO, parallel
@@ -100,6 +100,22 @@ config SPI_BUTTERFLY
 	  inexpensive battery powered microcontroller evaluation board.
 	  This same cable can be used to flash new firmware.
 
+config SPI_GPIO
+	tristate "GPIO-based bitbanging SPI Master"
+	depends on GENERIC_GPIO
+	select SPI_BITBANG
+	help
+	  This simple GPIO bitbanging SPI master uses the arch-neutral GPIO
+	  interface to manage MOSI, MISO, SCK, and chipselect signals.  SPI
+	  slaves connected to a bus using this driver are configured as usual,
+	  except that the spi_board_info.controller_data holds the GPIO number
+	  for the chipselect used by this controller driver.
+
+	  Note that this driver often won't achieve even 1 Mbit/sec speeds,
+	  making it unusually slow for SPI.  If your platform can inline
+	  GPIO operations, you should be able to leverage that for better
+	  speed with a custom version of this driver; see the source code.
+
 config SPI_IMX
 	tristate "Freescale iMX SPI controller"
 	depends on ARCH_IMX && EXPERIMENTAL
@@ -214,17 +230,6 @@ config SPI_XILINX
 #
 comment "SPI Protocol Masters"
 
-config SPI_AT25
-	tristate "SPI EEPROMs from most vendors"
-	depends on SYSFS
-	help
-	  Enable this driver to get read/write support to most SPI EEPROMs,
-	  after you configure the board init code to know about each eeprom
-	  on your target board.
-
-	  This driver can also be built as a module.  If so, the module
-	  will be called at25.
-
 config SPI_SPIDEV
 	tristate "User mode SPI device driver support"
 	depends on EXPERIMENTAL