i.MX ProcessorsのトピックRe: iMX6ul EPIT interrupt as user timer

iMX6ul EPIT interrupt as user timer

brucelian — Wed, 22 Mar 2017 12:56:03 GMT

iMX6ul,Kernel:4.1.15.at kernel My driver use two timer, microsecond.but EPIT is not implemented in IMX6Uxl.Counld transplant EPIT in kernel and provide examples of use?

Re: iMX6ul EPIT interrupt as user timer

igorpadykov — Wed, 22 Mar 2017 23:31:16 GMT

Hi bruce

there are epit.c and gpt.c functions in linux/arch/arm/mach-imx and time.c uses gpt functions,
one can try to replace them with epit:
http://git.freescale.com/git/cgit.cgi/imx/linux-imx.git/tree/arch/arm/mach-imx?h=imx_4.1.15_2.0.0_ga&id=rel_imx_4.1.15_2.0.0_ga
Linux timer is decribed in Chapter 3 Machine-Specific Layer (MSL) attached Linux Manual.

Best regards
igor
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Re: iMX6ul EPIT interrupt as user timer

brucelian — Thu, 23 Mar 2017 02:14:15 GMT

Hi igorpadykov:

thank you for your reply.

Could provide examples of the use of epit in the kernel driver?

Re: iMX6ul EPIT interrupt as user timer

igorpadykov — Thu, 23 Mar 2017 02:58:33 GMT

please check

https://community.nxp.com/thread/333749