i.MX28 SAIF pins state in running and standby mode

jörgkrause — Mon, 01 Aug 2016 15:36:32 GMT

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.

Re: i.MX28 SAIF pins state in running and standby mode

igorpadykov — Wed, 03 Aug 2016 23:49:41 GMT

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.mx28-evaluation-kit:MCIMX28EVKJ?fpsp=1&tab=Design_Tools_Tab

Best regards

igor

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i.MX28 SAIF pins state in running and standby mode

Re: i.MX28 SAIF pins state in running and standby mode