tree adb1e8b2177f6091a873ccd47c06a20d7de88c49
parent 9c26df9b27b67c607f4881551222f36d8bde865b
author William Breathitt Gray <vilhelm.gray@gmail.com> 1453315811 -0500
committer Linus Walleij <linus.walleij@linaro.org> 1453971076 +0100

gpio: Add GPIO support for the ACCES 104-DIO-48E

The ACCES 104-DIO-48E device provides 48 lines digital I/O via two
Programmable Peripheral Interface (PPI) chips of type 82C55. Bit C3 at
each 24-bit Group can be used as an external interrupt, triggered by a
rising edge.

This driver provides GPIO and IRQ support for these 48 channels of
digital I/O. The base port address for the device may be configured via
the dio_48e_base module parameter. The interrupt line number for the
device may be configured via the dio_48e_irq module parameter.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>