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3 commits

Author SHA1 Message Date
Kumar Gala 957e263120 drivers: gpio: Update drivers to use devicetree Kconfig symbol 
Update gpio drivers to use DT_HAS_<compat>_ENABLED Kconfig symbol
to expose the driver and enable it by default based on devicetree.

We remove 'depend on' Kconfig for symbols that would be implied by
the devicetree node existing.

Signed-off-by: Kumar Gala <galak@kernel.org>
 2022-07-23 09:26:09 -05:00
Wealian Liao 1a3a7b1d5e driver: gpio: nct38xx: Improve kconfig prompt 
As per the guidelines:
https://docs.zephyrproject.org/latest/guides/build/kconfig/tips.html#prompt-strings
This improves the NCT38XX Kconfig prompt string.

Signed-off-by: Wealian Liao <WHLIAO@nuvoton.com>
 2021-11-23 13:19:21 -05:00
Wealian Liao 5a9bc389f0 driver: gpio: nct38xx: Add NCT38XX gpio driver support 
NCT38XX series, which are i2c-based chips, support a different number
of GPIO functionality. For NCT3807, it has 2 GPIO ports on the same i2c
device address. For NCT3808, it has 2 GPIO ports on different i2c
device addresses. This commit adds NCT38XX GPIO driver support &
provides the interrupt handler for the share alert pin.

The following is NCT3807 devicetree node example:
```
&i2c0_0 {
	nct3807_0: nct3807@70 {
		#address-cells = <1>;
		#size-cells = <0>;
		compatible = "nuvoton,nct38xx-gpio";
		reg = <0x70>;
		label = "NCT3807_0";

		gpio@0 {
			compatible = "nuvoton,nct38xx-gpio-port";
			reg = <0x0>;
			label = "NCT3807_0_GPIO0";
			gpio-controller;
			#gpio-cells = <2>;
			ngpios = <8>;
			pin_mask = <0xff>;
			pinmux_mask = <0xf7>;
		};

		gpio@1 {
			compatible = "nuvoton,nct38xx-gpio-port";
			reg = <0x1>;
			label = "NCT3807_0_GPIO1";
			gpio-controller;
			#gpio-cells = <2>;
			ngpios = <8>;
			pin_mask = <0xff>;
		};
	};
};
```

Signed-off-by: Wealian Liao <WHLIAO@nuvoton.com>
 2021-11-20 08:00:38 -05:00