Rpi - Reading Analog Inputs - Need HELP/Advice

I am looking for examples on how to read analog sensor inputs (temperature, humidy, light level) directly onto a Rpi and into Openhab. I have used the GPIO bindings to drive the outputs on a Pi but can not figure out how to directly read inputs. I have an MCP3008 to handle the A/D but can not figure out what to do next. I do have an RF version working with a remote arduino into Rpi and read by Openhab. For this latest project, the sensors will all be located with the Rpi and no need to add the wireless approach as before. Thinking this is “probably” easy but can find zero examples, etc. Thanks much for any help.