CR_I2C1
CR_I2C1, "i2c chain 1");
(resource & (CR_I2C1 | CR_I2C2))) {
all_bits = resource_mask(0, CR_I2C1 | CR_I2C2) |
resource_mask(1, CR_I2C1 | CR_I2C2);
return target ? CR_I2C2 : CR_I2C1;