f133 挖坑2 ,修改 uart0 -> uart3 设置
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按很多大老的分享! https://bbs.aw-ol.com/topic/1673/全志芯片tina-linux-修改-uart-引脚-uart端口?lang=zh-CN
按其操作! 结果卡死在这儿
自已一顿操作! 发现一些和一些大老分享不一样的地方
uart3_pins_a: uart3_pins@0 { /* for mq-r uart3 */ pins = "PB6", "PB7"; function = "uart3"; muxsel = <7>; drive-strength = <10>; bias-pull-up; }; uart3_pins_b: uart3_pins@1 { /* For mq-r uart3 */ pins = "PB6", "PB7"; function = "gpio_in"; };
function 很多大老指向 uart0 ,但是这个明明是给 uart3 用的!
再者 muxsel 必需要改成 7 ,这个才是 uart3 功能/* &uart0 { pinctrl-names = "default", "sleep"; pinctrl-0 = <&uart0_pins_a>; pinctrl-1 = <&uart0_pins_b>; status = "okay"; }; &uart3 { compatible = "allwinner,sun20iw1-dsp-uart"; pinctrl-names = "default", "sleep"; pinctrl-0 = <&uart3_pins_a>; pinctrl-1 = <&uart3_pins_a>; status = "disabled"; }; mq-r */ &uart0 { pinctrl-names = "default", "sleep"; pinctrl-0 = <&uart0_pins_a>; pinctrl-1 = <&uart0_pins_b>; status = "disabled"; }; &uart3 { pinctrl-names = "default", "sleep"; pinctrl-0 = <&uart3_pins_a>; pinctrl-1 = <&uart3_pins_b>; status = "okay"; };
这一句一定要删掉,要不然就开不起来
compatible = "allwinner,sun20iw1-dsp-uart";目前坑还在接著挖! 有新坑再上来 po 文
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