iio: 104-quad-8: Add IIO support for the ACCES 104-QUAD-8

The ACCES 104-QUAD-8 is a general purpose quadrature encoder
counter/interface board. The 104-QUAD-8 is capable of monitoring the
outputs of eight encoders via four on-board LSI/CSI LS7266R1 24-bit
dual-axis quadrature counter chips. Core functions handled by the
LS7266R1, such as direction and total count, are available.

Performing a write to a counter's IIO_CHAN_INFO_RAW sets the counter and
also clears the counter's respective error flag. Although the counters
have a 25-bit range, only the lower 24 bits may be set, either directly
or via a counter's preset attribute. Interrupts are not supported by
this driver.

This driver adds IIO support for the ACCES 104-QUAD-8 and ACCES
104-QUAD-4. The base port addresses for the devices may be configured
via the base array module parameter.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index e013c2be6d23..982dff301045 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -255,6 +255,12 @@ L:	linux-gpio@vger.kernel.org
 S:      Maintained
 F:      drivers/gpio/gpio-104-idio-16.c
 
+ACCES 104-QUAD-8 IIO DRIVER
+M:      William Breathitt Gray <vilhelm.gray@gmail.com>
+L:      linux-iio@vger.kernel.org
+S:      Maintained
+F:      drivers/iio/counter/104-quad-8.c
+
 ACENIC DRIVER
 M:      Jes Sorensen <jes@trained-monkey.org>
 L:      linux-acenic@sunsite.dk