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注册时间： 2019-10-15

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主线Linux驱动 16路GPIO+全端口中断扩展芯片 AW9523B 驱动尝鲜

I2C 16路GPIO复合全端口中断扩展芯片 AW9523B
给F1C100/200s扩展中断扩展GPIO，一拖16，对于低频率的外设中断挺管用的
https://item.szlcsc.com/159410.html
我觉得还蛮小蛮便宜的 4x4 TQFN 立创1000+：￥1.1954 / 个
测试Linux内核版本: Linux 5.4.73

&pio {
	aw9523b_pins: aw9523b-pins {
		pins = "PE10";
		function = "gpio_in";
		bias-pull-up;
	};
};

&i2c0 {
	pinctrl-names = "default";
	pinctrl-0 = <&i2c0_pe_pins>;
	status = "okay";

	aw9523b: gpio-expander@5b {
		compatible = "awinic,aw9523b-gpio";
		reg = <0x5b>;
		pinctrl-names = "default";
		pinctrl-0 = <&aw9523b_pins>;
		interrupt-parent = <&pio>;
		interrupts = <4 10 IRQ_TYPE_EDGE_FALLING>;
		gpio-controller;
		#gpio-cells = <2>;
		interrupt-controller;
		#interrupt-cells = <2>;
		wakeup-source;
	};
};

aw9523b.zip

恒流LED部分的驱动？没有

最近编辑记录 aodzip (2020-11-03 19:56:49)