how to make 5mS timer in kernel in P2020 or P1011

[hyoungkikim]

hello everyone   ( i am not good at English  )

i use P2020 and P1011  and  OS is linux 

at last time  i use CPM2 timer and  kernel driver   at linux 2.6.29, CPU was MPC8248 

but  kernel is a lot different from old one   and CPU and the way to use interurpt  are much more complex

in CPU  Reference Manual   it  says it has timers at overview section

  i am not sure  it means    Global timer  regsiters ( in Programmable interrupt contoller )

but  i have no clue  how to use it ?

do i need to change DTS file ?

in linux source code, there is  a fsl_gtm.c ( gerneral timer )  file 

could i use it  and    how could i use it ?

is there any example to use fsl_gtm ?

thank you in advance 

[Pavel]

Look at attached snapshots and .dts file from NXP SDK 1.9 for the P2020RDB board. See also the following pages about using MPC timer:

https://github.com/mqmaker/linux/blob/master/Documentation/devicetree/bindings/powerpc/fsl/mpic-time...

https://github.com/torvalds/linux/blob/master/arch/powerpc/sysdev/mpic_timer.c

https://cregit.linuxsources.org/code/4.15/arch/powerpc/sysdev/mpic_timer.c.html

Have a great day,
Pavel Chubakov

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