i.MX28 SAIF pins state in running and standby mode

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i.MX28 SAIF pins state in running and standby mode

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jörgkrause
Contributor I


Hi,

I have a question and an issue with the i.MX28 SAIF pins using the Mainline kernel version 4.7.

Why is the MCLK always active, even if no audio playback is started?

If the CPU goes into standby mode, the output state of the MCLK and BITCLK are not reliable. Sometimes they go into HIGH state, another time into LOW state. What is the supposed behavior for these pins in standby mode?

Jörg Krause

EDIT: Note about Mainline kernel and version.

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377 次查看
igorpadykov
NXP TechSupport
NXP TechSupport

Hi Joerg

as answered on below link nxp does not support kernel mainline.

kobs-ng with 4.4+ kernels on imx6 processors

One can test with latest bsp from product page and port necessary changes

Board Support Packages (4)

i.MX28 Linux 2.6.35 Source Code Files and documentation (REV L2.6.35_1.1.0)

http://www.nxp.com/products/software-and-tools/software-development-tools/i.mx-software-and-tools/i....

Best regards

igor

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