title: How to write I2C Device Driver for i2c sensor?
body: <p>I want to write i2c device driver for i2c sensor, I'm totally confusing with 
  what is:</p>
  
  <ol>
  <li>i2c client driver</li>
  <li>what is i2c host driver</li>
  <li>what is i2c adapter driver</li>
  <li>what is algorithm driver</li>
  <li>how char driver access i2c device information</li>
  </ol>