API support for Beaglebone Blue Week-10

[Kiran Kumar Lekkala]

As mentioned in my last week report, since GSoC is closing by, I decided to work on the documentation and testing part, in parallel to the getting the PRU ready for the servo. Before I mention what I've done in Week-10, Let me specify the synopsis of the whatever I've done until now:

Sr. no	API	Coding	Testing	Documentation
1	LED and Button	Done	Done	Done
2	IMU (MPU-9250)	Done	Done	Done
3	Baro (BMP-280)	Done	Done	Done
4	PWM (eHRPWM)	Done	Done	Done
5	SPI	Done	Week-11	Week-12
6	UART	Done	Week-11	Week-12
7	I2C	Done	Week-11	Week-12
8	ADC	Done	Done	Done
9	Encoders (eQEP)	Done(Partially)	Week-11	Week-12
10	Servo (PRU)	Week-10,11	Week-11	Week-12

Encoders are partially done because right now, eQEP module only supports 3 modules. The 4th one should be enabled by the PRU which is yet to be done. Last week, I finished testing for MPU9250, Baro and PWM and the documentation for them. Whatever I've to do the next week is mentioned in the table.