我正在尝试在我的驱动程序中为 DM6446 GPIO BANK 0 中断设置一个中断处理程序。但是 request_irq 返回 -22。我从数据表中知道 GPIO BANK-0 的中断号,它声明它是 56。以下是我的代码中 GPIO 的设置。我想在 GPIO-10 上获得中断。
while((REG_VAL(PTSTAT) & 0x1) != 0); // Wait for power state transtion to finish
REG_VAL(MDCTL26) = 0x00000203; //To enable GPIO module and EMURSITE BIT as stated in sprue14 for state transition
REG_VAL(PTCMD) = 0x1; // Start power state transition for ALWAYSON
while((REG_VAL(PTSTAT) & 0x1) != 0); // Wait for power state transtion to finish
REG_VAL(PINMUX0) = REG_VAL(PINMUX0) & 0x80000000; //Disbale other Functionlaity on BANK 0 pins
printk(KERN_DEBUG "I2C: PINMUX0 = %x\n",REG_VAL(PINMUX0));
REG_VAL(DIR01) = REG_VAL(DIR01) | 0xFFFFFFFF; //Set direction as input for GPIO 0 and 10
REG_VAL(BINTEN) = REG_VAL(BINTEN) | 0x00000001; //Enable Interrupt for GPIO Bank 0
REG_VAL(SET_RIS_TRIG01) = REG_VAL(SET_RIS_TRIG01) | 0x00000401; // Enable rising edge interrupt of GPIO BANK 0 PIN 0 PIN 10
REG_VAL(CLR_FAL_TRIG01) = REG_VAL(CLR_FAL_TRIG01) | 0x00000401; // Disable falling edge interrupt of Bank 0
Result = request_irq(56,Gpio_Interrupt_Handler,0,"gpio",I2C_MAJOR);
if(Result < 0)
{
printk(KERN_ALERT "UNABLE TO REQUEST GPIO IRQ %d ",Result);
}
一点帮助将不胜感激。谢谢你。
我已经为 BANK-0 的 PIN-10 尝试了 gpio_to_irq,但它返回的 irq no 为 72,但 DM6446 的中断号仅在数据表中高达 63。