topic Re: Controlling SAI/I2S from A7 core in iMX7ULP in i.MX Processors

Controlling SAI/I2S from A7 core in iMX7ULP

jaiganesh_sridh — Thu, 21 May 2020 11:51:39 GMT

Hello,

Is it possible to control I2S/SAI controller from A7 domain in iMX7ULP?

By default, I2S/SAI drivers are available in M4 SDK (part of FreeRTOS) provided in the release package and are enabled by default to work with wm8960 codec. I could also see drivers available in linux (sound/soc/fsl/fsl_sai.c) and it is compatible with imx7ulp. So, can we control the I2S/SAI from A7 (Linux) itself ?

Thanks,

Jai Ganesh Sridharan

Re: Controlling SAI/I2S from A7 core in iMX7ULP

igorpadykov — Thu, 21 May 2020 12:10:34 GMT

Hi Jai

seems sai0 is used for A7 :

imx7ulp-evk-wm8960.dts\dts\boot\arm\arch - linux-imx - i.MX Linux kernel

Best regards
igor
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Re: Controlling SAI/I2S from A7 core in iMX7ULP

jaiganesh_sridh — Thu, 21 May 2020 13:48:34 GMT

Hi Igor,

Thank you. I can see it is controlled by A7. Can I2C0 also be controlled from A7 itself ?

Thanks,

Jai Ganesh Sridharan

Re: Controlling SAI/I2S from A7 core in iMX7ULP

igorpadykov — Thu, 21 May 2020 14:06:04 GMT

Hi Jai

seems this is possible configuring xrdc properly

(M4 SDK example ../driver_examples/xrdc/)

Best regards
igor