topic Re: Interrupt in imx6ull in i.MX Processors

Interrupt in imx6ull

mathew_k_t — Mon, 12 Feb 2018 10:29:30 GMT

Hi,

I would like to implement a button interrupt to ecspi. I have added following changes in dts

&ecspi4 {
   clock-frequency = <1000000>;
   fsl,spi-num-chipselects = <0>;
   cs-gpios = <0>;
   pinctrl-names = "default";
   pinctrl-0 = <&pinctrl_ecspi4>;
   status = "okay";

spidev@0 {
compatible = "fsl,spidev";

         interrupt-parent = <&gpio4>;
         interrupts = <27>;
         #interrupt-cells = <2>;
       spi-max-frequency = <52000000>;
       reg = <0>;
   };
};

configured GPIO4_IO27 as GPIO(for button)

MX6UL_PAD_CSI_DATA06__GPIO4_IO27 0x400010B0

I hope above configurations are correct. I believe, i have to make changes in spidev also. what are the changes to be made in spidv to enable this interrupt??

Re: Interrupt in imx6ull

igorpadykov — Mon, 12 Feb 2018 10:56:12 GMT

Hi mathew_k_t

for available spi interrupt options one can look at documentation

linux/Documentation/devicetree/bindings/spi/fsl-spi.txt
linux-imx.git - i.MX Linux Kernel
and spi driver sources : in linux/drivers/spi/spi-imx.c
linux-imx.git - i.MX Linux Kernel

Best regards
igor
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Re: Interrupt in imx6ull

mathew_k_t — Tue, 13 Feb 2018 10:34:12 GMT

Hi,

Simply, if I'm using GPIO1_IO31 as an interrupt source not for spi (general case), What will be the dts configurations for that?

Regards

Mathew

Re: Interrupt in imx6ull

igorpadykov — Tue, 13 Feb 2018 10:55:15 GMT

please look on

How to enable GPIO1 on X27 to act as an interrupt handler for max14830? - Toradex Community

Best regards
igor