Hello, I am trying to register a function writh IRQ :
static irqreturn_t uart_test (int irq , void *dev_id) { printk("/!\\ Interruption : tx_empty\n"); return IRQ_HANDLED; } req=request_irq(0x18,uart_test,NULL,"uart_test",NULL); printk("Initialisation IRQ UART : %d \n", req); When I boot linux ppc, the req value is -38. What is wrong ?
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