gpio: Add GPIO support for the ACCES 104-IDI-48

The ACCES 104-IDI-48 family of PC/104 utility boards feature 48
individually optically isolated digital inputs. Enabled inputs feature
change-of-state detection capability; if change-of-state detection is
enabled, an interrupt is fired off if a change of input level
(low-to-high or high-to-low) is detected. Change-of-state IRQs are
enabled/disabled on 8-bit boundaries, for a total of six boundaries.

This driver provides GPIO and IRQ support for these 48 channels of
digital input. The base port address for the device may be configured
via the idi_48_base module parameter. The interrupt line number for the
device may be configured via the idi_48_irq module parameter.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 18e1aa05a616..30d8bd3ed623 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -503,6 +503,15 @@ config GPIO_104_IDIO_16
           parameter. The interrupt line number for the device may be set via the
           idio_16_irq module parameter.
 
+config GPIO_104_IDI_48
+        tristate "ACCES 104-IDI-48 GPIO support"
+        select GPIOLIB_IRQCHIP
+        help
+          Enables GPIO support for the ACCES 104-IDI-48 family. The base port
+          address for the device may be configured via the idi_48_base module
+          parameter. The interrupt line number for the device may be configured
+          via the idi_48_irq module parameter.
+
 config GPIO_F7188X
         tristate "F71869, F71869A, F71882FG and F71889F GPIO support"
         help