1Broadcom Kona Family GPIO 2========================= 3 4This GPIO driver is used in the following Broadcom SoCs: 5 BCM11130, BCM11140, BCM11351, BCM28145, BCM28155 6 7The Broadcom GPIO Controller IP can be configured prior to synthesis to 8support up to 8 banks of 32 GPIOs where each bank has its own IRQ. The 9GPIO controller only supports edge, not level, triggering of interrupts. 10 11Required properties 12------------------- 13 14- compatible: "brcm,bcm11351-gpio", "brcm,kona-gpio" 15- reg: Physical base address and length of the controller's registers. 16- interrupts: The interrupt outputs from the controller. There is one GPIO 17 interrupt per GPIO bank. The number of interrupts listed depends on the 18 number of GPIO banks on the SoC. The interrupts must be ordered by bank, 19 starting with bank 0. There is always a 1:1 mapping between banks and 20 IRQs. 21- #gpio-cells: Should be <2>. The first cell is the pin number, the second 22 cell is used to specify optional parameters: 23 - bit 0 specifies polarity (0 for normal, 1 for inverted) 24 See also "gpio-specifier" in .../devicetree/bindings/gpio/gpio.txt. 25- #interrupt-cells: Should be <2>. The first cell is the GPIO number. The 26 second cell is used to specify flags. The following subset of flags is 27 supported: 28 - trigger type (bits[1:0]): 29 1 = low-to-high edge triggered. 30 2 = high-to-low edge triggered. 31 3 = low-to-high or high-to-low edge triggered 32 Valid values are 1, 2, 3 33 See also .../devicetree/bindings/interrupt-controller/interrupts.txt. 34- gpio-controller: Marks the device node as a GPIO controller. 35- interrupt-controller: Marks the device node as an interrupt controller. 36 37Example: 38 gpio: gpio@35003000 { 39 compatible = "brcm,bcm11351-gpio", "brcm,kona-gpio"; 40 reg = <0x35003000 0x800>; 41 interrupts = 42 <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH 43 GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH 44 GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH 45 GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH 46 GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH 47 GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>; 48 #gpio-cells = <2>; 49 #interrupt-cells = <2>; 50 gpio-controller; 51 interrupt-controller; 52 }; 53