Jetson Orin Nano 平台PPS GPIO驱动调试记录

1. 前言

版本： jetpack 5.1.2

我将GNSS模块的PPS引脚连接到Jetson Orin Nano Devkit，

如下所示:

 对device-tree进行如下配置:

/ {
 
        pps {
                gpios = <&tegra_main_gpio TEGRA234_MAIN_GPIO(AC, 6) GPIO_ACTIVE_HIGH>;
 
                compatible = "pps-gpio";
                status = "okay";
        };
};

报错：

[    1.513054] pps_core: LinuxPPS API ver. 1 registered
[    1.518017] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    4.404332] pps-gpio pps: failed to request PPS GPIO
[    4.409427] pps-gpio: probe of pps failed with error -22

是否应该修改40针头的GPIO09(目前为SFIO)为默认配置?

2. 查看 PAC.06

$ sudo cat