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IMX6ULL: GPT2: INPUT CAPTURE 1: Failed to register an FALLING EDGE interrupt

Question asked by Phani Teja on Jun 27, 2018
Latest reply on Jul 12, 2018 by gusarambula


Here is my code snippet

platform_get_resource(pdev, IORESOURCE_MEM, 0);
devm_ioremap_resource(&pdev->dev, mem);
timer->irq = platform_get_irq(pdev, 0);
devm_request_irq(p_dev, timer->irq, r_irq_handler, 2, INPUT_PIN_DESC, pdev->dev.of_node);


DTS file:

gpttest: gpttest@020e8000 {
compatible = "fsl,imx-gpttest";
reg = <0x020e8000 0x4000>;
interrupts = <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_GPT2_BUS>,
clock-names = "ipg", "per";

My devm_request_irq call is failing here with the following out:

   genirq: Setting trigger mode 2 for irq 36 failed (irq_chip_set_type_parent+0x0/0x20)
   DRIVER_NAME: probe of 20e8000.gpt failed with error -22


I have done some debugging, from the function __irq_set_trigger() in manage.c while validating the chip->irq_set_type() its returning -22 (invald argument) error


Is there any chip level limitation for FALLING_EDGE interrupt for this particular gpt2 capture pin 1? Am I missing anything to register this?



Phani Movva