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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt new file mode 100644 index 000000000..4a63bc96b --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt @@ -0,0 +1,52 @@ +Broadcom Kona Family GPIO +========================= + +This GPIO driver is used in the following Broadcom SoCs: + BCM11130, BCM11140, BCM11351, BCM28145, BCM28155 + +The Broadcom GPIO Controller IP can be configured prior to synthesis to +support up to 8 banks of 32 GPIOs where each bank has its own IRQ. The +GPIO controller only supports edge, not level, triggering of interrupts. + +Required properties +------------------- + +- compatible: "brcm,bcm11351-gpio", "brcm,kona-gpio" +- reg: Physical base address and length of the controller's registers. +- interrupts: The interrupt outputs from the controller. There is one GPIO + interrupt per GPIO bank. The number of interrupts listed depends on the + number of GPIO banks on the SoC. The interrupts must be ordered by bank, + starting with bank 0. There is always a 1:1 mapping between banks and + IRQs. +- #gpio-cells: Should be <2>. The first cell is the pin number, the second + cell is used to specify optional parameters: + - bit 0 specifies polarity (0 for normal, 1 for inverted) + See also "gpio-specifier" in .../devicetree/bindings/gpio/gpio.txt. +- #interrupt-cells: Should be <2>. The first cell is the GPIO number. The + second cell is used to specify flags. The following subset of flags is + supported: + - trigger type (bits[1:0]): + 1 = low-to-high edge triggered. + 2 = high-to-low edge triggered. + 3 = low-to-high or high-to-low edge triggered + Valid values are 1, 2, 3 + See also .../devicetree/bindings/interrupt-controller/interrupts.txt. +- gpio-controller: Marks the device node as a GPIO controller. +- interrupt-controller: Marks the device node as an interrupt controller. + +Example: + gpio: gpio@35003000 { + compatible = "brcm,bcm11351-gpio", "brcm,kona-gpio"; + reg = <0x35003000 0x800>; + interrupts = + <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH + GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH + GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH + GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH + GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH + GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>; + #gpio-cells = <2>; + #interrupt-cells = <2>; + gpio-controller; + interrupt-controller; + }; |