1 ============
2 Introduction
3 ============
4
5 The firmware API enables kernel code to reques
6 for functionality from userspace, the uses var
7
8 * Microcode for CPU errata
9 * Device driver firmware, required to be loade
10 microcontrollers
11 * Device driver information data (calibration
12 some of which can be completely optional.
13
14 Types of firmware requests
15 ==========================
16
17 There are two types of calls:
18
19 * Synchronous
20 * Asynchronous
21
22 Which one you use vary depending on your requi
23 however is you should strive to use the asynch
24 are already using asynchronous initialization
25 stall or delay boot. Even if loading firmware
26 processing firmware might, and this can still
27 as such mechanisms such as asynchronous probe
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