RK3568 gps N303-5Q

修改目录
kernel-5.10
device/rockchip/rk356x/
frameworks/base
system/core

dts配置

kernel-5.10
&uart4 {
        status = "okay";
        pinctrl-0 = <&uart4m0_xfer>;
+       gnss {
+                //compatible = "u-blox,neo-8";
+               dma-names = "!tx", "!rx";
+                vcc-supply = <&vcc3v3_gps>;
+                enable-gpios = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+               gps-rst-gpios = <&gpio3 RK_PC7 GPIO_ACTIVE_HIGH>;
+                current-speed = <115200>;
+        };
+
 };

ystem/core需将最新驱动更新，并且完全删除之前的gps配置

hardware\interfaces\gnss\2.0\default\ 下安卓接口代码修改

安卓6.0以上，需打开selinux关于串口、网络等的操作权限，否则hal获取不了串口数据。特别是user版本固件不能修改selinux权限为许可，需增加串口设备和vndbinder设备和tty_devies/serial_device等设备ioctl read write open等权限,才能正常启动GPS服务，才会读取到串口数据，要不然可能会启动服务失败导致so崩溃，编译前的修改参考：
在system/sepolicy/vendor/hal_gnss_default.te最后，增加：
allow hal_gnss_default vndbinder_device:chr_file { getattr ioctl read write open map };
allow hal_gnss_default serial_device:chr_file { getattr ioctl read write open map };
allow hal_gnss_default console_device:chr_file { getattr ioctl read write open map };
allow hal_gnss_default ttyS_device:chr_file { getattr ioctl read write open map };