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52 lines
2.1 KiB
52 lines
2.1 KiB
Broadcom Kona Family GPIO |
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========================= |
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This GPIO driver is used in the following Broadcom SoCs: |
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BCM11130, BCM11140, BCM11351, BCM28145, BCM28155 |
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The Broadcom GPIO Controller IP can be configured prior to synthesis to |
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support up to 8 banks of 32 GPIOs where each bank has its own IRQ. The |
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GPIO controller only supports edge, not level, triggering of interrupts. |
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Required properties |
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------------------- |
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- compatible: "brcm,bcm11351-gpio", "brcm,kona-gpio" |
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- reg: Physical base address and length of the controller's registers. |
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- interrupts: The interrupt outputs from the controller. There is one GPIO |
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interrupt per GPIO bank. The number of interrupts listed depends on the |
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number of GPIO banks on the SoC. The interrupts must be ordered by bank, |
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starting with bank 0. There is always a 1:1 mapping between banks and |
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IRQs. |
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- #gpio-cells: Should be <2>. The first cell is the pin number, the second |
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cell is used to specify optional parameters: |
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- bit 0 specifies polarity (0 for normal, 1 for inverted) |
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See also "gpio-specifier" in .../devicetree/bindings/gpio/gpio.txt. |
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- #interrupt-cells: Should be <2>. The first cell is the GPIO number. The |
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second cell is used to specify flags. The following subset of flags is |
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supported: |
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- trigger type (bits[1:0]): |
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1 = low-to-high edge triggered. |
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2 = high-to-low edge triggered. |
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3 = low-to-high or high-to-low edge triggered |
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Valid values are 1, 2, 3 |
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See also .../devicetree/bindings/interrupt-controller/interrupts.txt. |
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- gpio-controller: Marks the device node as a GPIO controller. |
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- interrupt-controller: Marks the device node as an interrupt controller. |
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Example: |
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gpio: gpio@35003000 { |
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compatible = "brcm,bcm11351-gpio", "brcm,kona-gpio"; |
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reg = <0x35003000 0x800>; |
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interrupts = |
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<GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH |
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GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH |
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GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH |
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GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH |
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GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH |
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GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>; |
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#gpio-cells = <2>; |
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#interrupt-cells = <2>; |
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gpio-controller; |
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interrupt-controller; |
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};
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