[POWERPC] bestcomm: core bestcomm support for Freescale MPC5200

This patch adds support for the core of the BestComm API
for the Freescale MPC5200(b). The BestComm engine is a
microcode-controlled / tasks-based DMA used by several
of the onchip devices.

Setting up the tasks / memory allocation and all common
low level functions are handled by this patch.
The specifics details of each tasks and their microcode
are split-out in separate patches.

This is not the official API, but a much cleaner one.
(hopefully)

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/bestcomm/Kconfig b/arch/powerpc/sysdev/bestcomm/Kconfig
new file mode 100644
index 000000000000..3366e24c10d6
--- /dev/null
+++ b/arch/powerpc/sysdev/bestcomm/Kconfig
@@ -0,0 +1,18 @@
+#
+# Kconfig options for Bestcomm
+#
+
+config PPC_BESTCOMM
+        tristate "Bestcomm DMA engine support"
+        depends on PPC_MPC52xx
+        default n
+        select PPC_LIB_RHEAP
+        help
+          BestComm is the name of the communication coprocessor found
+          on the Freescale MPC5200 family of processor. It's usage is
+          optionnal for some drivers (like ATA), but required for
+          others (like FEC).
+
+          If you want to use drivers that require DMA operations,
+          answer Y or M. Otherwise say N.
+