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driver: gpio: nct38xx: Add NCT38XX gpio driver support

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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>
This commit is contained in:
Wealian Liao 2021-11-08 11:02:01 +08:00 • committed by Anas Nashif
commit 5a9bc389f0
12 changed files with 1100 additions and 0 deletions
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17
include/drivers/gpio/gpio_nct38xx.h Normal file
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/*
* Copyright (c) 2021 Nuvoton Technology Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_DRIVERS_GPIO_GPIO_NCT38XX_H_
#define ZEPHYR_INCLUDE_DRIVERS_GPIO_GPIO_NCT38XX_H_
/**
* @brief Dispatch all GPIO ports ISR in the NCT38XX device.
*
* @param dev NCT38XX device.
*/
void nct38xx_gpio_alert_handler(const struct device *dev);
#endif /* ZEPHYR_INCLUDE_DRIVERS_GPIO_GPIO_NCT38XX_H_ */