Robert. While looking at some I2C-1 dts files i noticed a typo in
BB-I2C1-PCA9685-00A0.dts file
In the resources list I2C 1 has:
"P8\.18", /\* i2c1\_sda \*/
"P9\.17", /\* i2c1\_scl \*/
sda should be P9.18
just thought i should let you know