Hi We have designed a custom LS1046A based board.
I want to make a kernel driver that processes interrupt signals in cpld(fpga).
But, it is not registered as shown in the result of insmod below.
What should I do in this situation?
I'll be waiting for your answer
insmod result :
[ 490.674493] FPGA driver probed
[ 490.678134] Mapped IRQ: 20
[ 490.680892] genirq: Setting trigger mode 8 for irq 20 failed (gic_set_type+0x0/0xb0)
[ 490.688753] Failed to request FPGA interrupt
[ 490.693063] test_driver: probe of 7fb00000.board-control failed with error -22
kernel device tree
&ifc {
#address-cells = <2>;
#size-cells = <1>;
/* NAND Flashe and CPLD on board */
ranges = <0x0 0x0 0x0 0x7e800000 0x00010000
0x2 0x0 0x0 0x7fb00000 0x0000100>;
status = "okay";
nand@0,0 {
compatible = "fsl,ifc-nand";
reg = <0x0 0x0 0x10000>;
};
fpga: board-control@2,0 {
compatible = "fsl,ls1046ardb-cpld";
reg = <0x2 0x0 0x0008000>;
interrupts = <GIC_SPI 165 IRQ_TYPE_LEVEL_LOW>;
interrupt-parent = <&gic>;
status = "okay";
};
};
driver probe code
test_base = devm_ioremap_resource(&pdev->dev, &pdev->resource[0]);
if (IS_ERR(test_base))
{
pr_err("Failed to remap FPGA memory\n");
return PTR_ERR(test_base);
}
node = of_find_compatible_node(NULL, NULL, "fsl,ls1046ardb-cpld");
if (!node)
{
pr_err("Error: FPGA device tree node not found\n");
return -ENODEV;
}
irq_number = of_irq_get(node, 0);
if (irq_number < 0)
{
pr_err("Failed to get IRQ from device tree\n");
return irq_number;
}
pr_info("Mapped IRQ: %d\n", irq_number);
ret = request_irq(irq_number , test_irq_handler, IRQF_TRIGGER_LOW, "test_irq", pdev);
if (ret)
{
pr_err("Failed to request FPGA interrupt\n");
return ret;
}
Best regards,
2sanghaesea
