不幸的是,在树中实际执行此工作的示例很少 – 如果有的话 – 大多数将此标志保留为0(保持原样) – 这是grep for devm_request_irq时的结果片段,注意标志的值: ./drivers/crypto/mxs-dcp.c: ret = devm_request_irq(dev, dcp_vmi_irq, mxs_dcp_irq, 0, ./drivers/crypto/mxs-dcp.c: ret = devm_...
* IRQF_ONESHOT Run thread_fn with interrupt line masked*/intrequest_threaded_irq(unsignedintirq, irq_handler_t handler, irq_handler_t thread_fn, unsignedlongirqflags,constchar*devname,void*dev_id);/** * devm_request_threaded_irq - allocate an interrupt line for a managed device * @dev: ...
devm_iounmap 释放之前映射的地址,函数原型如下: void devm_iounmap(struct device *dev, void __iomem *addr); 1. dev:device设备 addr:要释放的虚拟地址 irq devm_request_irq 用于注册中断服务函数,函数原型如下: int devm_request_irq(struct device *dev, unsigned int irq, irq_handle_t handle, unsigne...
irq 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:...
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...
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_...
先看一个使用device resource management的例子(IRQ模块): 1: /* include/linux/interrupt.h */ 2: static inline int __must_check 3: devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler, 4: unsigned long irqflags, const char *devname, void *dev_id) ...
return 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);