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3 commits

Author SHA1 Message Date
Keith Short ea40f3af24 mfd: Add NCT38xx multi-function driver 
The Nuvoton NCT38xx is a multi-function device providing a TCPC
controller and a I/O expander (GPIO driver).  Add a multi-function
driver to manage exclusive access to the device.

Tested with "twister -T tests/drivers/build_all/gpio".

Signed-off-by: Keith Short <keithshort@google.com>
 2023-09-11 11:00:47 +02:00
Kumar Gala ac15cb668b dts: bindings: gpio: device labels are now optional 
All in tree device drivers use some form of DEVICE_DT_GET
so we no longer need to require label properties.

Signed-off-by: Kumar Gala <galak@kernel.org>
 2022-07-18 10:38:55 +00:00
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