不同的 GPIO 引脚可能支持不同的操作模式(如输入、输出、中断等)。确保你请求的 GPIO 引脚支持你的操作需求。 查阅硬件手册或数据表以获取详细信息。根据错误代码或日志信息,查找 gpio_request 失败的具体原因: gpio_request 返回一个负值表示失败,该值通常是 -errno 形式的错误代码。 使用printk 或其他日志记录机...
gpio_request_tail: Node 'regulator-vccq-sdhi0', property 'gpios', failed to request GPIO index 0: -19 regulator gpio - not found! Error: -19gpio_request_tail: Node 'regulator-vccq-sdhi0', property 'enable-gpios', failed to request GPIO index 0: -2 gpio@e6055400: set_value: error...
power_info->gpio_conf->cam_gpio_req_tbl, power_info->gpio_conf->cam_gpio_req_tbl_size,1);if(rc <0) { pr_err("%s: request gpio failed\n", __func__);returnrc; } msleep(20);if(power_info->gpio_conf->gpio_num_info->valid[SENSOR_GPIO_FL_EN]) { gpio_set_value_cansleep( ...
Re: V3s USB错误 Couldn't request ID GPIO 没看到别的地方有使用 PF6, 你到这个日志 sun4i-usb-phy 1c19400.phy: Couldn't request ID GPIO 附近加一些调试语句跟踪一下。 taobao: V3s/F1C100s/F1C200s/D1-H/D1s/T113-S3/XR32/XR829/A523/A133/H133/V831/V851s/V853 离线 楼主...
client->irq = gpio_to_irq(pdata->int_pin);if(gpio_is_valid(pdata->int_pin)) { result =gpio_request(pdata->int_pin,"mma8x5x_irq_gpio");if(result) { dev_err(&client->dev,"irq gpio(%d) request failed", pdata->int_pin);gotoerr_request_gpio; ...
if (gpiod_line_request_falling_edge_events(MCP23017_INTA_line, "MCP23017_INTA") !=0){ perror("gpiod_line_request_falling_edge_events(MCP23017_INTA) failed"); } Fulltest programmsource attached . I have also reflashed the image multiple times, no success. ...
一、驱动里面操作GPIO 在linux内核里面如果 pinctrl 子系统将一个 PIN 复用为 GPIO 的话,那么就可以用gpio 子系统提供的 API 函数操做gpio,比如设置 GPIO为输入输出,读取 GPIO 的值等。gpio 子系统的主要目的就是方便驱动开发者使用 gpio,驱动开发者在设备树中添加 gpio 相关信息,然后就可以在驱动程序中...
irq_num=gpio_to_irq(6); res=request_irq(irq_num,get_state,IRQF_DISABLED,"buttons",(void *)buf); if(res<0) { printk("request irq failed!\n"); return -EIO; } set_irq_type(irq_num, IRQ_TYPE_LEVEL_LOW); Would you please give me some suggestions about how to request irq by gp...
// Must connect INT to GPIOxx or not working //#define INT_GPIO 4 //#define MISO_GPIO 19 //#define MOSI_GPIO 23 //#define SCK_GPIO 18 //#define CS_GPIO 5 W5x00/W6100/ENC28J60 Ethernet<--->ESP32 MOSI <---> MOSI = GPIO23 MISO <---> MISO = GPIO19 SCK <---> ...
printk(KERN_ERR"Failed to request GPIO%d for smc91x IRQ\n", eth_gpio);return; } omap_set_gpio_direction(eth_gpio,1); } 开发者ID:bubyte,项目名称:linwizard-strtrk,代码行数:31,代码来源:board-3430sdp.c 示例4: n800_usb_init