caif-driver: Add CAIF-SPI Protocol driver.
This patch introduces the CAIF SPI Protocol Driver for
CAIF Link Layer.
This driver implements a platform driver to accommodate for a
platform specific SPI device. A general platform driver is not
possible as there are no SPI Slave side Kernel API defined.
A sample CAIF SPI Platform device can be found in
.../Documentation/networking/caif/spi_porting.txt
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/caif/Kconfig b/drivers/net/caif/Kconfig
index 6f33ee4..631a624 100644
--- a/drivers/net/caif/Kconfig
+++ b/drivers/net/caif/Kconfig
@@ -12,3 +12,22 @@
The CAIF TTY transport driver is a Line Discipline (ldisc)
identified as N_CAIF. When this ldisc is opened from user space
it will redirect the TTY's traffic into the CAIF stack.
+
+config CAIF_SPI_SLAVE
+ tristate "CAIF SPI transport driver for slave interface"
+ depends on CAIF
+ default n
+ ---help---
+ The CAIF Link layer SPI Protocol driver for Slave SPI interface.
+ This driver implements a platform driver to accommodate for a
+ platform specific SPI device. A sample CAIF SPI Platform device is
+ provided in Documentation/networking/caif/spi_porting.txt
+
+config CAIF_SPI_SYNC
+ bool "Next command and length in start of frame"
+ depends on CAIF_SPI_SLAVE
+ default n
+ ---help---
+ Putting the next command and length in the start of the frame can
+ help to synchronize to the next transfer in case of over or under-runs.
+ This option also needs to be enabled on the modem.