System: 64-bit Kernel version: 6.6 Debian version: 12 (bookworm) $ sudo ./load_module.sh insmod: ERROR: could not insert module hc_sr04.ko: Operation not permitted $dmesg [ 5297.940325] [HC-SR04]: ERROR: GPIO 15 request The failure ofgpio_requestcause the failedinsmod: Operation not per...
其原型为int gpio_request(unsigned gpio, const char *label)先说说其参数,gpio则为你要申请的哪一个管脚,label则是为其取一个名字。其具体实现如下: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 ...
I've published a merge request to fix it but is unlikely to back-port to stable. My patch branch can be found at https://salsa.debian.org/Iam_Tj/initramfs-tools/-/tree/fix-ACPI-DSDT sudo cp ./dsdt.modified.aml /etc/initramfs-tools/DSDT.aml sudo update-initramfs -u -v Confirmation...
[ 2.154614] failed to request rs232 enable GPIO err: -517 This is my driver source code, could you please give me some help? struct gpio_desc rs232_enable_gpio; rs232_enable_gpio = devm_gpiod_get_index_optional(dev, "rs232-enable", 0, GPIOD_OUT_LOW); if (IS_ERR(rs232_enable...
Also gpio request works fine if the same section is added in 'drivers/gpio/gpio-mxc.c' file. Best Regards, Yashavantha 0 件の賞賛 返信 10-10-2019 12:55 AM 1,758件の閲覧回数 igorpadykov NXP Employee Hi Yashavantha one can try to debug it using AN4553 Using Open Source...
7. request_irq() 函数原型:int request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, const char *name, void *dev) 函数说明:注册中断处理函数和中断号。 参数说明: - irq:中断号。 - handler:中断处理函数。 - flags:中断属性。 - name:中断名称。 - dev:设备指针。 返回值:...
1、gpio_request函数 gpio_request函数用于申请一个GPIO管脚,在使用一个GPIO之前一定要使用gpio_request进行申请,函数原型如下: int gpio_request(unsigned gpio, const char *label) 函数参数和返回值含义如下: gpio:要申请的gpio标号,使用of_get_named_gpio函数从设备树获取指定GPIO属性信息,此函数会返回这个GPIO的标...
what(): error requesting GPIO lines: Unknown error 517和多数中断注册API一样,libgpiod可以监视三种中断:上升沿,下降沿和双边沿。以监视PH00上的下降沿为例: PH00.request({"", gpiod::line_request::EVENT_FALLING_EDGE, 0}); 之后就可以通过gpiod::line::event_wait()来等待中断了,这个调用会一直...
其原型为 int gpio_request(unsigned gpio, const char *label) 先说说其参数,gpio则为你要申请的哪一个管脚,label则是为其取一个名字。其具体实现如下: int gpio_request(unsigned gpio, const char *label) { struct gpio_desc *desc;//这个自己看源码 struct gpio_chip *chip;//这个自己看源码 int stat...
IRQ_NOREQUEST, 0); return rv; } static void mxc_gpio_get_hw(struct platform_device *pdev) { const struct of_device_id *of_id = of_match_device(mxc_gpio_dt_ids, &pdev->dev); enum mxc_gpio_hwtype hwtype; if (of_id) pdev->id_entry = of_id->data; ...