topic Re: IMX6 ESAI TDM mode configuration in driver in i.MX Processors

IMX6 ESAI TDM mode configuration in driver

dp_yanam — Wed, 03 Apr 2019 18:09:56 GMT

Hi everyone,

i was new to IMX6 yocto. we trying to interface ADC chip in frame sync (ADS1274) using ESAI TDM mode.

Can anyone please tell me what is easiest way to implement driver & application to use for it.

Please share if you have any information related to ESAI configurations for above chip in device tree.

Thanks in advance,

K.durgaprasad

Re: IMX6 ESAI TDM mode configuration in driver

igorpadykov — Thu, 04 Apr 2019 01:21:30 GMT

Hi Durgaprasad

tdm is supported in esai driver using fsl_esai_set_dai_tdm_slot() function

linux/sound/soc/fsl/fsl_esai.c

fsl_esai.c\fsl\soc\sound - linux-imx - i.MX Linux kernel

in fsl_esai_startup() : /* Set a default slot number -- 2 */

Best regards
igor
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Re: IMX6 ESAI TDM mode configuration in driver

dp_yanam — Thu, 04 Apr 2019 18:07:54 GMT

Hi igor,

Thanks for your reply. i had gone through "fsl_esai.c" file. I want to know like we need to write a new driver for ADS1274 to get frame sync TDM mode on ESAI or SSI interface. Can you please tell me the procedure to get the communication up. we want to interface ADC without codec to imx6 process for capture the data from ADC.

Thanks & Regards,

K.durgaprasad.

Re: IMX6 ESAI TDM mode configuration in driver

igorpadykov — Fri, 05 Apr 2019 00:31:21 GMT

Hi Durgaprasad

one can look at audio drivers described in

Linux L4.14.78_1.0.0 Documentation

and use them as starting point.

Best regards
igor

Re: IMX6 ESAI TDM mode configuration in driver

dp_yanam — Mon, 08 Apr 2019 09:51:43 GMT

Hello igor,

Thanks for sharing the documents. I will start from scratch & let you know if i facing any issues.

Thanks & regards,

K. durgaprasad.

Re: IMX6 ESAI TDM mode configuration in driver

dp_yanam — Mon, 15 Apr 2019 06:40:58 GMT

Hello igor,

i could able to work on SSI TDM mode configurations. my driver is working fine with interfacing the SSI with ADC.

We want to generate 24MHz master clock (SCLK) & FS clock 48KHz. Can you please tell me the configurations for the clock. i was try to change the master clock settings in driver but it was generating only 2.45MHz.

Thanks & regards,

K. durgaprasad