答:Linux设备驱动程序通过调用request_irq函数来申请中断,从request_irq函数返回的值为0时,表示申请成功;负值表示出现错误。 该函数中的参数为: irq表示所要申请的硬件中断号。 handler为向系统登记的中断处理子程序,中断产生时由系统来调用,调用时所带参数irq为中断号,dev_id为申请时告诉系统的设备标识,regs为中断...
函数原型 int request_irq(unsigned int irq, /* 做实参传递给中断服务函数第1个参数 */ Irq_handler_t handler, /* 中断服务函数指针 */ unsigned long flags, const char *name, void *dev_id); /* 做实参传递给中断服务函数第2个参数 */ 函数功能: 向内核注册一个中断服务函数; 当发生中断号为irq...
static irqreturn_t intr_handler(int irq, void *dev_id, struct pt_regs *regs) 注意,它的类型与request_irq()参数中的handler所要求的参数类型相匹配。第一个参数irq就是这个处理程序要响应的中断的中断线号,现在已无太大用处。第二个蚕食是dev_id通用指针,它与在中断处理程序注册时传递给request_irq()的...
{char*name;//名称intirq;//中断号unsignedshortcode;//按键编码值intgpio;//管脚编号}btn_desc_t; btn_desc_t buttons[]={ {"up", IRQ_GPIO_A_START+28, KEY_UP, PAD_GPIO_A+28}, {"down", IRQ_GPIO_B_START+30, KEY_DOWN, PAD_GPIO_B+30}, {"left", IRQ_GPIO_B_START+31, KEY_LEFT...
[ Upstream commit fe9a708 ] Currently for devices requiring masking at the irqchip for INTx, ie. devices without DisINTx support, the IRQ is enabled in request_irq() and subsequently disabled as necessary to align with the masked status flag. This presents a window where the interrupt coul...
In /proc/interrupt, irq number is virtual irq or hardware irq. In dummy request_irq, when ever I am providing irq number it is reflecting at /proc/interrupt with same irq number Thanks,Mallikarjuna 0 Kudos Reply 05-08-2024 12:06 AM 538 Views Zhiming_Liu ...
.dma_irq = I2C4_TX_DMA_IRQ, \ .request = DMA_REQUEST_I2C4_TX \ } #endif /* defined(SOC_SERIES_STM32F2) || defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7) */ #endif /* I2C4_TX_DMA_CONFIG */ #endif /* BSP_I2C4_TX_USING_DMA */ #ifdef BSP_I2C4_RX_USING_...
-> request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));// 加载内核模块 -> device_initialize(&dev->dev);//设备模型中的一些设备,主要是kset、kobject、ktype的设置 -> irq_of_parse_and_map(child,0);//将中断解析并映射到linux virq空间( ...
request_irq(MXC_INT_GPIO1_INT5_NUM, itest_irq_handler,0 ,"itest", &itest_device); //write directly to gpio1 imr reg //Test only! normally don't do this way as it clears all the other irqs that may have been enabled) __raw_writel(0x20,MX6_IO_ADDRESS(GPIO1_BASE_ADDR+0x14)...
ERR = PCI_ALLOC_IRQ_VECTORS (dev、1、1、PCI_IRQ_ALL_Types); PCI_Request_IRQ (PCI_dev、0、msi_handler、NULL、dev、 "MSI%I"、0); 来分配和处理 MSI0中断。 我认为这将映射到单个 MSI0。 您能否确认 CIC0 PCIe_0_INT4 (数据表的表7-24)是否映射到 MSI...