FMC: create drivers/fmc and toplevel Kconfig question

This commit creates the drivers/fmc directory and puts the necessary
hooks for kbuild and kconfig.  The code is currently a placeholder
that only registers an empty bus.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Juan David Gonzalez Cobas <dcobas@cern.ch>
Acked-by: Emilio G. Cota <cota@braap.org>
Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

6 files changed, 57 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 5be702cc8449..14746ad5ee15 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3309,6 +3309,15 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/jikos/floppy.git
 S:      Odd fixes
 F:      drivers/block/floppy.c
 
+FMC SUBSYSTEM
+M:      Alessandro Rubini <rubini@gnudd.com>
+W:      http://www.ohwr.org/projects/fmc-bus
+S:      Supported
+F:      drivers/fmc/
+F:      include/linux/fmc*.h
+F:      include/linux/ipmi-fru.h
+K:      fmc_d.*register
+
 FPU EMULATOR
 M:      Bill Metzenthen <billm@melbpc.org.au>
 W:      http://floatingpoint.sourceforge.net/emulator/index.html
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 9953a42809ec..ae050b54c368 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -166,4 +166,6 @@ source "drivers/ipack/Kconfig"
 
 source "drivers/reset/Kconfig"
 
+source "drivers/fmc/Kconfig"
+
 endmenu
diff --git a/drivers/Makefile b/drivers/Makefile
index 130abc1dfd65..336b0ad0acd0 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -152,3 +152,4 @@ obj-$(CONFIG_IIO)		+= iio/
 obj-$(CONFIG_VME_BUS)           += vme/
 obj-$(CONFIG_IPACK_BUS)         += ipack/
 obj-$(CONFIG_NTB)               += ntb/
+obj-$(CONFIG_FMC)               += fmc/
diff --git a/drivers/fmc/Kconfig b/drivers/fmc/Kconfig
new file mode 100644
index 000000000000..e28790267c69
--- /dev/null
+++ b/drivers/fmc/Kconfig
@@ -0,0 +1,17 @@
+#
+# FMC (ANSI-VITA 57.1) bus support
+#
+
+menuconfig FMC
+        tristate "FMC support"
+        help
+
+          FMC (FPGA Mezzanine Carrier) is a mechanical and electrical
+          standard for mezzanine cards that plug into a carrier board.
+          This kernel subsystem supports the matching between carrier
+          and mezzanine based on identifiers stored in the internal I2C
+          EEPROM, as well as having carrier-independent drivers.
+
+          The framework was born outside of the kernel and at this time
+          the off-tree code base is more complete.  Code and documentation
+          is at git://ohwr.org/fmc-projects/fmc-bus.git .
diff --git a/drivers/fmc/Makefile b/drivers/fmc/Makefile
new file mode 100644
index 000000000000..a2784d8b5306
--- /dev/null
+++ b/drivers/fmc/Makefile
@@ -0,0 +1,4 @@
+
+obj-$(CONFIG_FMC) += fmc.o
+
+fmc-y = fmc-core.o
diff --git a/drivers/fmc/fmc-core.c b/drivers/fmc/fmc-core.c
new file mode 100644
index 000000000000..fc3547f32d5e
--- /dev/null
+++ b/drivers/fmc/fmc-core.c
@@ -0,0 +1,24 @@
+/* Temporary placeholder so the empty code can build */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+static struct bus_type fmc_bus_type = {
+        .name = "fmc",
+};
+
+static int fmc_init(void)
+{
+        return bus_register(&fmc_bus_type);
+}
+
+static void fmc_exit(void)
+{
+        bus_unregister(&fmc_bus_type);
+}
+
+module_init(fmc_init);
+module_exit(fmc_exit);
+
+MODULE_LICENSE("GPL");