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>
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