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- =====================
- Firmware lookup order
- =====================
- Different functionality is available to enable firmware to be found.
- Below is chronological order of how firmware will be looked for once
- a driver issues a firmware API call.
- * The ''Built-in firmware'' is checked first, if the firmware is present we
- return it immediately
- * The ''Firmware cache'' is looked at next. If the firmware is found we
- return it immediately
- * The ''Direct filesystem lookup'' is performed next, if found we
- return it immediately
- * The ''Platform firmware fallback'' is performed next, but only when
- firmware_request_platform() is used, if found we return it immediately
- * If no firmware has been found and the fallback mechanism was enabled
- the sysfs interface is created. After this either a kobject uevent
- is issued or the custom firmware loading is relied upon for firmware
- loading up to the timeout value.
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