^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) * General Purpose Input Output (GPIO) bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) Properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) - compatible: "cavium,octeon-3860-gpio"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) Compatibility with all cn3XXX, cn5XXX and cn6XXX SOCs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) - reg: The base address of the GPIO unit's register bank.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) - gpio-controller: This is a GPIO controller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) - #gpio-cells: Must be <2>. The first cell is the GPIO pin.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) - interrupt-controller: The GPIO controller is also an interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) controller, many of its pins may be configured as an interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) source.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) - #interrupt-cells: Must be <2>. The first cell is the GPIO pin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) connected to the interrupt source. The second cell is the interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) triggering protocol and may have one of four values:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 1 - edge triggered on the rising edge.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 2 - edge triggered on the falling edge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 4 - level triggered active high.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 8 - level triggered active low.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) - interrupts: Interrupt routing for each pin.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) Example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) gpio-controller@1070000000800 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #gpio-cells = <2>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) compatible = "cavium,octeon-3860-gpio";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) reg = <0x10700 0x00000800 0x0 0x100>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) gpio-controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* Interrupts are specified by two parts:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * 1) GPIO pin number (0..15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * 2) Triggering (1 - edge rising
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * 2 - edge falling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * 4 - level active high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * 8 - level active low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) interrupt-controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #interrupt-cells = <2>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* The GPIO pin connect to 16 consecutive CUI bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) interrupts = <0 16>, <0 17>, <0 18>, <0 19>,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) <0 20>, <0 21>, <0 22>, <0 23>,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) <0 24>, <0 25>, <0 26>, <0 27>,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) <0 28>, <0 29>, <0 30>, <0 31>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) };