SAI3 port data line's pull select fields

[ganapathiraopil]

Hi,

I am trying to add a new sound card as an external mic to record the voice in imx7d board, for this I am configuring sai3 port. For sai3 , the available pull select fields are 100K PD, 5K PU, 47K PU and 100K PU. So on which basis we need to select these values. Do we have any proper format to follow while configuring these pull fields or we can have any of these available values?.

Kernel version - 4.1.15

Please help me regarding this.

Thanks in advance.

Regards,

Ganapathirao

[igorpadykov]

Hi Ganapathirao

some signals may be tristated (both codec and i.MX7) as described in

Table 13-44. SAI External Signals i.MX7D Reference Manual

http://cache.nxp.com/files/32bit/doc/ref_manual/IMX7DRM.pdf

so pad settings should be set appropriately. Settings provided in NXP

software : linux and FreeRTOS bsps can be used as starting point

and adjusted based on waveforms required by datasheet.

Best regards
igor
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