TDA4VL-Q1: how to control pmic-b SW_B2A output?

Hello,

The PMIC-B SW_B2A/B is controlled via the I2C interface.  The PMIC-B, TPS65941421, I2C address is 0x4C.  The register to enable the regulator is 0x06, bit0 (BUCK2_EN) and bit4 (BUCK2_VMON_EN).  

Please refer to the user guide for a description of the PMIC NVM configuration, https://www.ti.com/lit/ug/slvucj9/slvucj9.pdf

The register map and I2C protocol are described in the datasheet; 

https://www.ti.com/lit/ds/symlink/tps6594-q1.pdf#page=156

https://www.ti.com/lit/ds/symlink/tps6594-q1.pdf#page=174

Also find this description for the PMIC, https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/08_02_00_05/exports/docs/pdk_jacinto_08_02_00_21/docs/apiguide/j721e/html/group__DRV__PMIC__POWER__MODULE.html

Regards,
Chris

hi Chris

 Thanks for your reply! I will use the pin voltage in mcu2_0, is thera any api can be used? Or I must write the i2c driver myself?

 Dose A72 support  pmic-a/b driver ?I didn't find the relevant driver.

Hello,

I am not as familiar with the software.  The PMIC drivers are agnostic in terms of the processor, but you would need to do the port/integration to your specific platform.   I was thinking you could use this API: https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/08_02_00_05/exports/docs/pdk_jacinto_08_02_00_21/docs/apiguide/j721e/html/group__DRV__PMIC__POWER__MODULE.html#gaf22f4d55e4377a46d48d519ef01c0d84.

Regards,
Chris

hi Chris

    I'm very sorry, can you transfer this problem to your software colleague? Or should i ask a new question to software team?

Hi,

The I2C driver is available in multiple locations in the SDKs that TI provides.

For A72, the i2c driver will be available as part of the HLOS offering.   If an A72 based I2C command is desired, please advise and we can continue discussing that option.

For I2C from the MCU2_0, please reference the PDK documentation at below link:

4.9. I2C — Platform Development Kit (PDK) - JACINTO User Guide (ti.com)

Regards,

kb

hi KB

   The i2c of  pmic-b used is wakeup_i2c0，how  to control this bus in mcu2_0?

hi KB

  Any update?

Hi,

Are you looking for support on RTOS SDK or the Linux SDK?

Regards,
Parth

hi  Parth

   I am looking for on RTOS, Thanks.