On 02.03.2021 22:10:49, ukrfoil.com, Cтудиопак Украина, Восточный регион wrote:
> The reason for the terminal freezing on these boards (as an example of
> Nanopi NEO) occurs in this function when trying to disable interrupts
> disable_irq(spi->irq); If you comment out this given call, the hangs
> do not occur.
Nice debugging!
Can you give us the complete device tree and the output of:
cat /proc/interrupts
Maybe there's a shared interrupt that's vital for your system.
One note:
| can0: can@0 {
| reg = <0>;
| compatible = "microchip,mcp2515";
| pinctrl-names = "default";
| pinctrl-0 = <&can0_pin_irq>;
| interrupt-parent = <&pio>;
| interrupts = <6 8 IRQ_TYPE_EDGE_FALLING>;
You better use IRQ_TYPE_LEVEL_LOW instead of IRQ_TYPE_EDGE_FALLING, but
that's unrelated to this problem.
| clocks = <&can0_osc_fixed>;
| spi-max-frequency = <10000000>;
| gpio-controller;
| gpio-cells = <2>;
| status = "okay";
| };
regards,
Marc
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