i.MX ProcessorsのトピックRe: IMX8 i2c slave eeprom clock stretching

IMX8 i2c slave eeprom clock stretching

MJaroc — Thu, 09 Feb 2023 11:20:35 GMT

Hi,

Im using IM8MM development board as slave eeprom emulator (i2c-slave-eeprom module). Im observe a long clock streching after master's request to my board. Sometimes its run normally, but usually looks like this:

I dont now why driver need 340 us stretch. I try to disable read from file in user-space and send random data from module but it stil need stretch.

I need to speed-up this driver, because my master doesnt support that long stretch.

Running system:
Linux visionsom-8mm-cb-std 5.4.24-lts-somlabs_imx_5.4.24_2.1.0+gd4858bce452f #1 SMP PREEMPT Tue Feb 7 11:14:29 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux

Re: IMX8 i2c slave eeprom clock stretching

AldoG — Thu, 09 Feb 2023 22:44:29 GMT

Hello,

I see that you're using a SOMLABS BSP, I would suggest to contact them regarding this issue you’re seeing.

Best regards,
Aldo.

Re: IMX8 i2c slave eeprom clock stretching

MJaroc — Wed, 15 Feb 2023 10:19:35 GMT

Hi,

how can i disable clock stretching in controler? Is this even posible?