Does the I2C4 in OMAP is used only for SMART REFLEX control. I need to enable the SMARTREFLEX_ENABLE bit in the DC/DC_GLOBAL_CFG register on TPS65950 chip. I hope after enabling this bit only, we can go for smart reflex control on the devices. So for enabling this bit, do we need to use the I2C4 or the other I2C controller we can use.
Here is my query which i send it to Power management team & their replies.[For Reference]
Re: TPS65950: Smart Reflex
By Gandhar Dighe in Power Management ICs for OMAP™ Applications Processors
Query 1: I found that we can enable smart reflex method by enabling SMARTREFEX_ENABLE bit in DC/DC_GLOBAL_CFG[3] register. I found two such registers with same address but with different Instance POWERPM_RECEIVER & PM_RECEIVER. What does it mean?
Reply 1: PM_RECEIVER is just a way to separate registers based on some classes mentioned in the database tools used. You can see different instances used for different registers. In this case there would have been a problem with the extraction/filtering from the database tool. I would not look at this field at all as it is not really necessary from software programming perspective. I would give importance to the physical address.
Query 2: Do we need to use the dedicated I2C for enabling this smartreflex SP-I2C or the general I2C GP-I2C for this? [In my system hardware i have connected I2C2 as GP-I2C & I2C4 as SP-I2C].
Reply 2: I2C4 is used for smart reflex control.
Query 3: Can we do power management using smart reflex for VDD2 also?
Reply 3: Yes
Query 4: Is that dedicated I2C (I2C4 in OMAP) is used only for smart reflex?
Reply 4: Yes, you can double check with OMAP support.
Query 5: can we use the smart reflex & voltage control mode( for controlling other supplies) together?
Reply 5: SR is used only for the two core supplies, VDD1 and VDD2. I didnt understand the question, if this is not clear then please rephrase your question.