0001 Broadcom Kona Family GPIO
0002 =========================
0003
0004 This GPIO driver is used in the following Broadcom SoCs:
0005 BCM11130, BCM11140, BCM11351, BCM28145, BCM28155
0006
0007 The Broadcom GPIO Controller IP can be configured prior to synthesis to
0008 support up to 8 banks of 32 GPIOs where each bank has its own IRQ. The
0009 GPIO controller only supports edge, not level, triggering of interrupts.
0010
0011 Required properties
0012 -------------------
0013
0014 - compatible: "brcm,bcm11351-gpio", "brcm,kona-gpio"
0015 - reg: Physical base address and length of the controller's registers.
0016 - interrupts: The interrupt outputs from the controller. There is one GPIO
0017 interrupt per GPIO bank. The number of interrupts listed depends on the
0018 number of GPIO banks on the SoC. The interrupts must be ordered by bank,
0019 starting with bank 0. There is always a 1:1 mapping between banks and
0020 IRQs.
0021 - #gpio-cells: Should be <2>. The first cell is the pin number, the second
0022 cell is used to specify optional parameters:
0023 - bit 0 specifies polarity (0 for normal, 1 for inverted)
0024 See also "gpio-specifier" in .../devicetree/bindings/gpio/gpio.txt.
0025 - #interrupt-cells: Should be <2>. The first cell is the GPIO number. The
0026 second cell is used to specify flags. The following subset of flags is
0027 supported:
0028 - trigger type (bits[1:0]):
0029 1 = low-to-high edge triggered.
0030 2 = high-to-low edge triggered.
0031 3 = low-to-high or high-to-low edge triggered
0032 Valid values are 1, 2, 3
0033 See also .../devicetree/bindings/interrupt-controller/interrupts.txt.
0034 - gpio-controller: Marks the device node as a GPIO controller.
0035 - interrupt-controller: Marks the device node as an interrupt controller.
0036
0037 Example:
0038 gpio: gpio@35003000 {
0039 compatible = "brcm,bcm11351-gpio", "brcm,kona-gpio";
0040 reg = <0x35003000 0x800>;
0041 interrupts =
0042 <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH
0043 GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH
0044 GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH
0045 GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH
0046 GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH
0047 GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
0048 #gpio-cells = <2>;
0049 #interrupt-cells = <2>;
0050 gpio-controller;
0051 interrupt-controller;
0052 };
