字符设备驱动(1)代码分析---之request_irq err =request_irq(irq, button_interrupt, IRQ_TYPE_EDGE_BOTH, buttons[i].name, (void*)&buttons[i]);staticinlineint__must_check request_irq(unsignedintirq, irq_handler_t handler, unsignedlongflags,constchar*name,void*dev) {returnrequest_threaded_irq(...
dev_id在中断共享时会用到,一般设置为这个设备的设备结构体或者NULL 使用实例:request_irq(IRQ_EINT0,buttons_irq, IRQ_TYPE_EDGE_BOTH, "K2",&press_cnt[0]);
#define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING) //边沿触发 #define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */ //高电平触发 #define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */ //低电平触发 #define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask...
#define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING) //边沿触发 #define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */ //高电平触发 #define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */ //低电平触发 #define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask...
reg += OMAP_MPUIO_GPIO_INT_EDGE; l = __raw_readl(reg); - if (trigger & IRQ_TYPE_EDGE_BOTH) + if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) bank->toggle_mask |= 1 << gpio; if (trigger & IRQ_TYPE_EDGE_RISING) ...
请问mini2440按键驱动中的终端申请函数flag形参为什么是IRQ_TYPE_EDGE_BOTH(中断触发方式)? ) {continue;}disable_irq(button_irqs.irq);free_irq(button_irqs.irq, (void *)&button_irqs);}return wang222222018-08-20 04:59:37 为什么bootloader在下载写入完成后跳转至app执行就会异常复位 ...
err =request_irq(button_irqs[i].irq, irq_interrupt, IRQ_TYPE_EDGE_BOTH, button_irqs[i].name, (void *)&button_irqs[i]); if (err) break; } if (err) { i--; for (; i >= 0; i--) { if (button_irqs[i].irq < 0) continue; disable_irq(button_irqs[i].irq); free_irq(...
- return IRQ_TYPE_EDGE_BOTH; - default: - return IRQ_TYPE_NONE; - } -} - /** * acpi_gsi_to_irq() - Retrieve the linux irq number for a given GSI * @gsi: GSI IRQ number to map @@ -82,7 +63,7 @@ int acpi_register_gsi(struct device *dev, u32 gsi, int ...
sense = ICR1_IRQS_EDGE_FALLING; break; case IRQ_TYPE_EDGE_RISING: sense = ICR1_IRQS_EDGE_RISING; break; case IRQ_TYPE_EDGE_BOTH: sense = ICR1_IRQS_EDGE_BOTH; break; default: return -EINVAL; } tmp = readw_relaxed(priv->base + ICR1); tmp &= ~ICR1_IRQS_MASK(hw_irq); tmp ...
* IRQ_TYPE_EDGE_BOTH - rising and falling edge triggered * IRQ_TYPE_LEVEL_HIGH - high level triggered * IRQ_TYPE_LEVEL_LOW - low level triggered * IRQ_TYPE_LEVEL_MASK - Mask to filter out the level bits * IRQ_TYPE_SENSE_MASK - Mask for all the above bits ...