linux_old1/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt

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Aeroflex Gaisler GRGPIO General Purpose I/O cores.
The GRGPIO GPIO core is available in the GRLIB VHDL IP core library.
Note: In the ordinary environment for the GRGPIO core, a Leon SPARC system,
these properties are built from information in the AMBA plug&play.
Required properties:
- name : Should be "GAISLER_GPIO" or "01_01a"
- reg : Address and length of the register set for the device
- interrupts : Interrupt numbers for this device
Optional properties:
- nbits : The number of gpio lines. If not present driver assumes 32 lines.
For further information look in the documentation for the GLIB IP core library:
http://www.gaisler.com/products/grlib/grip.pdf