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1 | Kernel driver twl4030-madc | ||
2 | ========================= | ||
3 | |||
4 | Supported chips: | ||
5 | * Texas Instruments TWL4030 | ||
6 | Prefix: 'twl4030-madc' | ||
7 | |||
8 | |||
9 | Authors: | ||
10 | J Keerthy <j-keerthy@ti.com> | ||
11 | |||
12 | Description | ||
13 | ----------- | ||
14 | |||
15 | The Texas Instruments TWL4030 is a Power Management and Audio Circuit. Among | ||
16 | other things it contains a 10-bit A/D converter MADC. The converter has 16 | ||
17 | channels which can be used in different modes. | ||
18 | |||
19 | |||
20 | See this table for the meaning of the different channels | ||
21 | |||
22 | Channel Signal | ||
23 | ------------------------------------------ | ||
24 | 0 Battery type(BTYPE) | ||
25 | 1 BCI: Battery temperature (BTEMP) | ||
26 | 2 GP analog input | ||
27 | 3 GP analog input | ||
28 | 4 GP analog input | ||
29 | 5 GP analog input | ||
30 | 6 GP analog input | ||
31 | 7 GP analog input | ||
32 | 8 BCI: VBUS voltage(VBUS) | ||
33 | 9 Backup Battery voltage (VBKP) | ||
34 | 10 BCI: Battery charger current (ICHG) | ||
35 | 11 BCI: Battery charger voltage (VCHG) | ||
36 | 12 BCI: Main battery voltage (VBAT) | ||
37 | 13 Reserved | ||
38 | 14 Reserved | ||
39 | 15 VRUSB Supply/Speaker left/Speaker right polarization level | ||
40 | |||
41 | |||
42 | The Sysfs nodes will represent the voltage in the units of mV, | ||
43 | the temperature channel shows the converted temperature in | ||
44 | degree celcius. The Battery charging current channel represents | ||
45 | battery charging current in mA. | ||