Linux/AM5728: McASP pinmux issue

vijay Patil

Part Number: AM5728

Tool/software: Linux

Hi sir,

I have am5728 custom board in which i am using audio codec connected to mcasp2. I want to pin mux those pins but in mux.h file which is present in U-boot/board/ti/am57xx/ directory of SDK.

The ball names are present in the 1st array, so i have added ball name with respective mux mode.

Is it correct way?

else how to check whether those pins have been pin muxed in kernel dts?

Because i am able to see the audio code when i put arecord -l or aplay -l but not able to listen anything.

Thanks

Vijay

over 7 years ago

0 Pavel Botev over 7 years ago

TI__Guru**** 170625 points

Hi Vijay,

Yes, you should do you McASP2 pinmux in AM572x SPL/MLO. Then you can check your McASP2 pinmux is correct at u-boot prompt with "md" command.

Then you can check your McASP2 pinmux is still correct in user space with devmem2 or omapconf tools.

Check below links for more info:

www.ti.com/.../sprac44a.pdf
www.ti.com/.../sprac09a.pdf
www.ti.com/.../sprac10.pdf

Regards,
Pavel

0 vijay Patil over 7 years ago in reply to Pavel Botev

Intellectual 810 points

Thanks for reply.

Sir but the pins which i am using is not mention int the mux.h do i need to add those pins and respective muxmode.
I am talking about the mux.h file which is present in SDK it is as per EVM right?
Do i need to add ball names and respective mux mode which are not present?

Thanks
vijay

0 Pavel Botev over 7 years ago in reply to vijay Patil

TI__Guru**** 170625 points

Vijay,

You need to add McASP2 pinmux to core_padconf_array_essential_x15[] in below file:

u-boot-2017.01/board/ti/am57xx/mux_data.h

See for example how McASP3 pinmux is done, and make the same for McASP2.

Regards,
Pavel

0 vijay Patil over 7 years ago in reply to Pavel Botev

Intellectual 810 points

Thanks for reply.

Sir i have added MCASP2 pins in the following file mention by you but still i am unable to listen anything from the codec?
Whether this pins has been used any where else or GPAM5728 evm?

Thanks,
Vijay

0 Pavel Botev over 7 years ago in reply to vijay Patil

TI__Guru**** 170625 points

vijay Patil said:
Sir i have added MCASP2 pins in the following file mention by you but still i am unable to listen anything from the codec?

Please check McASP2 pins from user space with devmem2 tool. Provide me the mcasp2 pinmux register values dump for analysis.

vijay Patil said:
Whether this pins has been used any where else or GPAM5728 evm?

No, McASP2 pins are not used else in AM572x EVM. McASP2 pins are used for AM574x IDK, AM572x IDK and AM571x IDK.

You can also check with oscilloscope if McASP2 pins have the expected and correct signals, thus you will find if the problem is in AM572x McASP2 module or in external audio codec or external speaker.

Regards,
Pavel

0 vijay Patil over 7 years ago in reply to Pavel Botev

Intellectual 810 points

Thanks for reply.

I have two audio codec which is connected on same i2c bus, i want to add two codecs simultaneously, How to add that?
I went through the devicetree documentation and treid but unable to get it.
Will you please tell me how to add?

Thanks,
Vijay

0 Pavel Botev over 7 years ago in reply to vijay Patil

TI__Guru**** 170625 points

Vijay,

Yes, you can use two codecs. Refer to the below pointers for details:

www.ti.com/.../sprac09a.pdf - 5.1 Digital Audio Interface Links

e2e.ti.com/.../666058
e2e.ti.com/.../428765

Regards,
Pavel

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Linux/AM5728: McASP pinmux issue