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