title: Working with GPIO on bcm2836
body: <p>I am writing a GPIO-driver for my RPI2 OS. And I was surfing really long time about it, but I found only linux data. How should I do such functions as </p>
  
  <pre><code>void gpio_set(int pin);
  void gpio_clr(int pin);
  </code></pre>
  
  <p>in C for the driver. Or, maybe it can be done due inline assembly?</p>