PPS信号的生成和输出:除了作为PPS信号的消费者,PPS-GPIO也可以用于生成PPS信号。有些项目,如pps-gen-gpio,提供了通过GPIO引脚生成PPS信号的功能,这在测试和模拟PPS信号时非常有用。 module_platform_driver pps_gpio_driver pps_gpio_probe pps_gpio_setup--根据dts配置获取GPIO pin、是否assert-falling-edge、echo...
1. kernel timer client 是内核软件模拟的pps信号,用于测试 2. pps client using gpio 是以gpio作为pps信号源 pps-gpio.c源码实现也比较简单,主要通过注册gpio中断,当gpio电平变化时,记录当前系统运行时刻,然后post event到用户空间。 因为使用了外部GPIO,因此在使用该模块之前,需要在dts中指定相关的gpio引脚,compati...
356: 0 0 0 0 mpc8xxx-gpio 28 Edge pps.-1IPI0: 33569268 50029802 40483554 40281328 Rescheduling interruptsIPI1: 170 527 539 468 Function call interruptsIPI2: 0 0 0 0 CPU stop interruptsIPI3: 0 0 0 0 CPU stop (for crash dump) interruptsIPI4: 0 0 0 0 Timer broadcast interruptsIP...
am335x-boneblack.dts pps-gen-gpio.txt pps_gen_gpio.c README GPL-2.0 license pps-gen-gpio Linux kernel PPS generator using GPIO pins. In kernel 5.4 there is no support for using a GPIO pin as a PPS generator, only a GPIO PPS client is available. This driver is derived from the cur...
我们有自定义 tda4板、我们计划将来自 GPS 器件的 PPS 信号连接到 WKUP_GPIO0_12。 我们在内核中启用了 PPS 支持、并在 K3-j721e-common-proc-board.dts 文件中添加了以下更改: 我连接引脚 WKUP_GPIO0_12和 WKUP_GPIO0_13、并使用 ppstest 工具。日志如下: ...
Linux_for_Tegra/sources/hardware/nvidia/soc/t210/kernel-dts/tegra210-soc/tegra210-soc-base.dtsi pps { gpios = <&gpio TEGRA_GPIO(B, 7) 0>; compatible = "pps-gpio"; status = "okay"; }; I want to know is there any easier way to make it work?
- gpio =<&gpio37GPIO_ACTIVE_HIGH>; - off-on-delay-us = <12000>; - enable-active-high; - }; - reg_vdd_12v: regulator-vdd-12v { compatible = "regulator-fixed"; regulator-name = "reg_vdd_12v"; @@ -770,21 +766,6 @@
硬件接口:3.3V、UART5(J58/H58, ttyTHS4)、PPS_GPIO(B58, GPIO_PA.00) BSP支持 1、添加PPS 支持 由于Xavier(NX/Nano/TX)不支持专用PPS硬件信号,通过软件将GPIO模拟接收PPS信号,修改如下: hardware\nvidia\platform\t19x\galen\kernel-dts\common\tegra194-p2888-0000-a00.dtsi ...
cp -r $kernel_out/arch/arm64/boot/dts/nvidia $JETPACK/kernel/dtb 编译前,需要修改三点: 1. kernel/kernel-5.10/arch/arm64/configs/tegra_defconfig CONFIG_PPS=y CONFIG_PPS_DEBUG=y CONFIG_PPS_CLIENT_KTIMER=y CONFIG_PPS_CLIENT_GPIO=y
pps-gen-gpio: Update driver to kernel 4.14 Feb 22, 2018 am335x-boneblack.dts pps-gen-gpio: Update driver to kernel 4.14 Feb 22, 2018 pps-gen-gpio.txt first commit Jul 18, 2014 pps_gen_gpio.c Fixes to move to timespec64 to build on Linux v5.15 ...