when battery_bench is run
exports a file in the rockbox directory called 'battery_levels.default'
if the user wants their own levels they can rename the file battery_levels.cfg
and it will be loaded at boot
some minimal error checking is performed prior to using the values
added manual entry
Change-Id: Ia0126faced0c7229fcf8385a1bcb584b5a9dc378
HiFi E.T. MA8 is almost the same as MA9 except
another DAC(pcm1792 in ma8, df1704 in ma9).
MA8 has ILI9342 lcd, MA8C has ILI9342C lcd.
Change-Id: If2ac04f5a3382590b2a392c46286559f54b2ed6a
The only difference between this target and HiFi E.T. MA9
is display driver (ILI9342 in MA9 and ILI9342c in MA9C)
Change-Id: Icc3d2490f850902a653175360f12283f3708bbb7
button_read_device() could be called before pca9555_read_thread
intializes pca9555_in_ports variable, and return incorrect value.
Change-Id: I960bff72fe230c9d0256b20e92d0a75e67266038
This speeds up partial updates quite a bit but what is more
important it opens up a way to efficiently implement
lcd_blit_yuv() using hw colorspace conversion.
Tested on rk27generic, hm60x v1 and v2 and on ma9.
Benchmark for hm60x v1 (by mortalis):
HEAD patched
1/1 141fps 138fps
1/4 315fps 395fps
Change-Id: I4cc115786c3139000fc14c49a7290e289cfd6c42
