| author | daisy.skye的博客_CSDN博客-Qt,嵌入式,Linux领域博主 https://blog.csdn.net/qq_40715266?type=blog |
| 系列 | 基于RK3568的Linux驱动开发——GPIO知识点（一）_daisy.skye的博客-CSDN博客基于RK3568的Linux驱动开发—— GPIO知识点（二）_daisy.skye的博客-CSDN博客 |
| adb 查看 显示不同的状态 |
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| NO PULL | bias-disable; /* No PULL */ drive-strength = <2>; /* 2 MA */ |
代码修改：
qdsd_cmd_trace: cmd_trace {config {
pins = "gpio2";
bias-pull-down; /* pull down */
drive-strength = <2>; /* 2 MA */};};
qdsd_cmd_swduart: cmd_uart {config {
pins = "gpio3";
bias-pull-up; /* pull up */
drive-strength = <2>; /* 2 MA */};};
qdsd_cmd_jtag: cmd_jtag {config {
pins = "gpio4";
bias-disable; /* NO pull */
drive-strength = <8>; /* 8 MA */};};
