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46 lines
1.5 KiB
46 lines
1.5 KiB
Bindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers. |
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These bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345 |
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are the only ones which don't need a pinctrl driver. |
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BCM6338 have 8-bit data and dirout registers, where GPIO state can be read |
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and/or written, and the direction changed from input to output. |
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BCM6345 have 16-bit data and dirout registers, where GPIO state can be read |
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and/or written, and the direction changed from input to output. |
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Required properties: |
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- compatible: should be "brcm,bcm6345-gpio" |
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- reg-names: must contain |
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"dat" - data register |
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"dirout" - direction (output) register |
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- reg: address + size pairs describing the GPIO register sets; |
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order must correspond with the order of entries in reg-names |
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- #gpio-cells: must be set to 2. The first cell is the pin number and |
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the second cell is used to specify the gpio polarity: |
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0 = active high |
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1 = active low |
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- gpio-controller: Marks the device node as a gpio controller. |
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Optional properties: |
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- native-endian: use native endian memory. |
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Examples: |
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- BCM6338: |
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gpio: gpio-controller@fffe0407 { |
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compatible = "brcm,bcm6345-gpio"; |
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reg-names = "dirout", "dat"; |
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reg = <0xfffe0407 1>, <0xfffe040f 1>; |
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#gpio-cells = <2>; |
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gpio-controller; |
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}; |
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- BCM6345: |
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gpio: gpio-controller@fffe0406 { |
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compatible = "brcm,bcm6345-gpio"; |
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reg-names = "dirout", "dat"; |
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reg = <0xfffe0406 2>, <0xfffe040a 2>; |
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native-endian; |
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#gpio-cells = <2>; |
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gpio-controller; |
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};
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