UIO: add automata sercos3 pci card support

Here is a new version of the patch to support the Automata Sercos III
PCI card driver. I now check that the IRQ is enabled before accepting
the interrupt.

I still use a logical OR to store the enabled interrupts and I've
added a second use of a logical OR when restoring the enabled
interrupts. I added an explanation of why I do this in comments at the
top of the source file.

Since I use a logical OR, I also removed the extra checks if the
Interrupt Enable Register and ier0_cache are 0.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Hans J. Koch <hjk@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index 4190be64917f..04b954cfce76 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -58,4 +58,17 @@ config UIO_SMX
 
           If you compile this as a module, it will be called uio_smx.
 
+config UIO_SERCOS3
+        tristate "Automata Sercos III PCI card driver"
+        default n
+        help
+          Userspace I/O interface for the Sercos III PCI card from
+          Automata GmbH. The userspace part of this driver will be
+          available for download from the Automata GmbH web site.
+
+          Automata GmbH:        http://www.automataweb.com
+          Sercos III interface: http://www.sercos.com
+
+          If you compile this as a module, it will be called uio_sercos3.
+
 endif