usb: Add driver for Altus Metrum ChaosKey device (v2)
This is a hardware random number generator. The driver provides both a
/dev/chaoskeyX entry and hooks the entropy source up to the kernel
hwrng interface. More information about the device can be found at
http://chaoskey.org
The USB ID for ChaosKey was allocated from the OpenMoko USB vendor
space and is visible as 'USBtrng' here:
http://wiki.openmoko.org/wiki/USB_Product_IDs
v2: Respond to review from Oliver Neukum <oneukum@suse.de>
* Delete extensive debug infrastructure and replace it with calls to
dev_dbg.
* Allocate I/O buffer separately from device structure to obey
requirements for non-coherant architectures.
* Initialize mutexes before registering device to ensure that open
cannot be invoked before the device is ready to proceed.
* Return number of bytes read instead of -EINTR when partial read
operation is aborted due to a signal.
* Make sure device mutex is unlocked in read error paths.
* Add MAINTAINERS entry for the driver
Signed-off-by: Keith Packard <keithp@keithp.com>
Cc: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 358eb01..059a9d4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10129,6 +10129,12 @@
F: drivers/net/usb/cdc_*.c
F: include/uapi/linux/usb/cdc.h
+USB CHAOSKEY DRIVER
+M: Keith Packard <keithp@keithp.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/misc/chaoskey.c
+
USB CYPRESS C67X00 DRIVER
M: Peter Korsgaard <jacmet@sunsite.dk>
L: linux-usb@vger.kernel.org