> IRQ编号可以通过irq_of_parse_and_map()获得(如您所述);此函数不仅返回IRQ号,还存储IRQ号的IRQ标志(最终通过调用irqd_set_trigger_type());存储的IRQ标志将在devm_request_irq()中自动使用,如果您没有向其传递IRQ触发器类型(例如,您可以传递flags = 0) > IRQ标志可以在irq_get_trigger_type()获得,但...
devm_request_irq devm_free_irq mem devm_kmalloc devm_kzalloc devm_kfree pinctrl devm_pinctrl_get devm_pinctrl_put 设备树相关 查找节点的of函数 of_find_node_by_name struct device_node *of_find_node_by_name(struct device_node *from, const char *name); 通过节点名字查找指定的节点 from:要开...
* separately, devm_free_irq() must be used.*/intdevm_request_threaded_irq(structdevice *dev, unsignedintirq, irq_handler_t handler, irq_handler_t thread_fn, unsignedlongirqflags,constchar*devname,void*dev_id); 由此可见,它们比request_irq()、devm_request_irq()多了一个参数 thread_fn。用...
int devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id); 此函数与request_irq()的区别是devm_开头的API申请的是内核“managed”的资源,一般不需要在出错处理和remove()接口里再显式的释放。有点类似Java的垃圾回收...
int devm_request_irq(struct device *dev, unsigned int irq, irq_handle_t handle, unsigned int flags, const char *name, void* dev_id); 1. 2. dev:device设备 irq:中断号,可以通过platform_get_irq获得 handle:中断处理函数 flags:中断触发方式,上升沿/下降沿等 ...
devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) //释放中断 const void *free_irq(unsigned int irq, void *dev_id) //使能和屏蔽某个中断 void disable_irq(unsigned int irq) //需要等待目前中断处理完...
2)、request_irq()函数本质上是中断处理线程thread_fn为空的request_threaded_irq()函数。 注: 对应的中断释放函数为:void free_irq(unsigned int, void *),需要和中断申请函数成对出现。 三、devm_request_threaded_irq() 1、文件 kernel/irq/devres.c ...
c 这 个 驱 动 文 件 ， 路 径 为drivers/input/touchscreen/st1232.c，找到 st1232_ts_irq_...
ret = devm_request_irq(&pdev->dev, irq, rk3x_i2c_irq, 0, dev_name(&pdev->dev), i2c); if (ret < 0) { dev_err(&pdev->dev, "cannot request IRQ "); return ret; } platform_set_drvdata(pdev, i2c); if (i2c->soc_data->calc_timings == rk3x_i2c_v0_calc_timings) { ...
devm_input_allocate_device() IO region //kernel/resource.c devm_release_mem_region() devm_release_region() devm_release_resource() devm_request_mem_region() devm_request_region() devm_request_resource() IOMAP //lib/devres.c devm_ioport_map() ...