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Juno dts timer node

armdev

Hi,

I am trying to bring-up linux on Juno r0 board and if I use below timer node I am getting kernel panic while executing timer_init API.

Please let me know if I am missing anything else in order to enable timer ?

memtimer: timer@2a810000

{

       compatible = "arm,armv7-timer-mem";

       reg = <0x0 0x2a810000 0x0 0x10000>;

       clock-frequency = <50000000>;

       #address-cells = <0x2>;

       #size-cells = <0x2>;

       ranges;

       status = "disabled";

       frame@2a830000 {

                 frame-number = <0x1>;

                 interrupts = <0x0 0x3c 0x4>;

                 reg = <0x0 0x2a830000 0x0 0x10000>;

       };

  };

timer

{

       compatible = "arm,armv8-timer";

       interrupts = <1 13 0xff01>,

                        <1 14 0xff01>,

                        <1 11 0xff01>,

                        <1 10 0xff01>;

};

Thanks.

  • 0

    Hi,

    I am still facing issue with timers in Juno where arch_timer_register API is failing.

    I tried only using "armv8-timer" and removed "armv7-timer-mem" node as it seems first one is used for per CPU timer.

    Could some one please provide any inputs as what could be wrong ? Also, which clock domain timer belongs to ? I am assuming apb_pclk as frequency matches ?

    I am using only below node in device tree -

    timer {

                    compatible = "arm,armv8-timer";

                    interrupts = <1 13 0xff01>,

                                 <1 14 0xff01>,

                                 <1 11 0xff01>,

                                 <1 10 0xff01>;

                    clock-frequency = <100000000>;

            };

    Thanks.

  • 0

    Hi armdev,

    Are you using mainline kernel ? If so it has a patch to skip disabled timer, so

    the memory mapped timer won't have any effect.

    So please provide the delta dts you have with respect to mainline to understand the problem.

    Regards,

    Sudeep