topic Re: spread spectrum on imx6 in i.MX Processors

spread spectrum on imx6

jack_mao — Mon, 01 Jun 2015 08:29:52 GMT

Here are documents for spread spectrum

Original Attachment has been moved to: flash_header.S.zip

Original Attachment has been moved to: 0005-ENGR00285890-imx6-plugin-update-the-ROM_API_TABLE_BA.patch.zip

Re: spread spectrum on imx6

宗標廖 — Wed, 09 Nov 2016 04:58:02 GMT

Hello Jack Mao

The flash_header.S is for LTIB.

Could you tell me how to implement spread spectrum for Yocto.

Thank you very much!

ZongbiaoLiao

Re: spread spectrum on imx6

jack_mao — Wed, 22 Mar 2017 02:17:06 GMT

Yocto has a plugin macro to enable spread specturm, very simple

Re: spread spectrum on imx6

jack_mao — Wed, 22 Mar 2017 02:19:34 GMT

the sample code has a error, attached patch has fix it, so it should like the following

before_calling_rom___pu_irom_hwcnfg_setup:
    ldr r3, =ROM_VERSION_OFFSET
    ldr r4, [r3]
    ldr r3, =ROM_VERSION_TO12
    cmp r4, r3
    ldrge r3, =ROM_API_TABLE_BASE_ADDR_MX6DL_TO12
    ldrlt r3, =ROM_API_TABLE_BASE_ADDR_LEGACY
    ldr r4, [r3, #ROM_API_HWCNFG_SETUP_OFFSET]
    blx r4 /* This address might change in future ROM versions */
after_calling_rom___pu_irom_hwcnfg_setup:

Re: spread spectrum on imx6

petertseng — Fri, 21 Apr 2017 07:27:40 GMT

Hi Jack Mao,

I also need to implement the spread spectrum for Yocto.

Whether it can prompt the source location and implement method.

regards

Peter Tseng