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- UniPhier GPIO controller
- Required properties:
- - compatible: Should be "socionext,uniphier-gpio".
- - reg: Specifies offset and length of the register set for the device.
- - gpio-controller: Marks the device node as a GPIO controller.
- - #gpio-cells: Should be 2. The first cell is the pin number and the second
- cell is used to specify optional parameters.
- - interrupt-controller: Marks the device node as an interrupt controller.
- - #interrupt-cells: Should be 2. The first cell defines the interrupt number.
- The second cell bits[3:0] is used to specify trigger type as follows:
- 1 = low-to-high edge triggered
- 2 = high-to-low edge triggered
- 4 = active high level-sensitive
- 8 = active low level-sensitive
- Valid combinations are 1, 2, 3, 4, 8.
- - ngpios: Specifies the number of GPIO lines.
- - gpio-ranges: Mapping to pin controller pins (as described in gpio.txt)
- - socionext,interrupt-ranges: Specifies an interrupt number mapping between
- this GPIO controller and its interrupt parent, in the form of arbitrary
- number of <child-interrupt-base parent-interrupt-base length> triplets.
- Optional properties:
- - gpio-ranges-group-names: Used for named gpio ranges (as described in gpio.txt)
- Example:
- gpio: gpio@55000000 {
- compatible = "socionext,uniphier-gpio";
- reg = <0x55000000 0x200>;
- interrupt-parent = <&aidet>;
- interrupt-controller;
- #interrupt-cells = <2>;
- gpio-controller;
- #gpio-cells = <2>;
- gpio-ranges = <&pinctrl 0 0 0>;
- gpio-ranges-group-names = "gpio_range";
- ngpios = <248>;
- socionext,interrupt-ranges = <0 48 16>, <16 154 5>, <21 217 3>;
- };
- Consumer Example:
- sdhci0_pwrseq {
- compatible = "mmc-pwrseq-emmc";
- reset-gpios = <&gpio UNIPHIER_GPIO_PORT(29, 4) GPIO_ACTIVE_LOW>;
- };
- Please note UNIPHIER_GPIO_PORT(29, 4) represents PORT294 in the SoC document.
- Unfortunately, only the one's place is octal in the port numbering. (That is,
- PORT 8, 9, 18, 19, 28, 29, ... are missing.) UNIPHIER_GPIO_PORT() is a helper
- macro to calculate 29 * 8 + 4.
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