Oh, right, sorry. I'm having trouble finding it now, but what you need is the detailed reference manual for either the TWL4030 or the TPS65950, they're basically the same thing for our purposes. Somewhere in that manual it'll give a list of i2c register addresses, one of which will be something along the lines of "wake response" or whatever. It's a very large manual, unfortunately.
Once you know that, you can use i2cget ("sudo opkg install i2c-tools" and then "i2cget <address>") to get a number which you can use to make a decision.
