1 Kernel driver twl4030-madc 1 Kernel driver twl4030-madc
2 ========================== 2 ==========================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Texas Instruments TWL4030 6 * Texas Instruments TWL4030
7 7
8 Prefix: 'twl4030-madc' 8 Prefix: 'twl4030-madc'
9 9
10 10
11 Authors: 11 Authors:
12 J Keerthy <j-keerthy@ti.com> 12 J Keerthy <j-keerthy@ti.com>
13 13
14 Description 14 Description
15 ----------- 15 -----------
16 16
17 The Texas Instruments TWL4030 is a Power Manag 17 The Texas Instruments TWL4030 is a Power Management and Audio Circuit. Among
18 other things it contains a 10-bit A/D converte 18 other things it contains a 10-bit A/D converter MADC. The converter has 16
19 channels which can be used in different modes. 19 channels which can be used in different modes.
20 20
21 21
22 See this table for the meaning of the differen 22 See this table for the meaning of the different channels
23 23
24 ======= ====================================== 24 ======= ==========================================================
25 Channel Signal 25 Channel Signal
26 ======= ====================================== 26 ======= ==========================================================
27 0 Battery type(BTYPE) 27 0 Battery type(BTYPE)
28 1 BCI: Battery temperature (BTEMP) 28 1 BCI: Battery temperature (BTEMP)
29 2 GP analog input 29 2 GP analog input
30 3 GP analog input 30 3 GP analog input
31 4 GP analog input 31 4 GP analog input
32 5 GP analog input 32 5 GP analog input
33 6 GP analog input 33 6 GP analog input
34 7 GP analog input 34 7 GP analog input
35 8 BCI: VBUS voltage(VBUS) 35 8 BCI: VBUS voltage(VBUS)
36 9 Backup Battery voltage (VBKP) 36 9 Backup Battery voltage (VBKP)
37 10 BCI: Battery charger current (ICHG) 37 10 BCI: Battery charger current (ICHG)
38 11 BCI: Battery charger voltage (VCHG) 38 11 BCI: Battery charger voltage (VCHG)
39 12 BCI: Main battery voltage (VBAT) 39 12 BCI: Main battery voltage (VBAT)
40 13 Reserved 40 13 Reserved
41 14 Reserved 41 14 Reserved
42 15 VRUSB Supply/Speaker left/Speaker righ 42 15 VRUSB Supply/Speaker left/Speaker right polarization level
43 ======= ====================================== 43 ======= ==========================================================
44 44
45 45
46 The Sysfs nodes will represent the voltage in 46 The Sysfs nodes will represent the voltage in the units of mV,
47 the temperature channel shows the converted te 47 the temperature channel shows the converted temperature in
48 degree Celsius. The Battery charging current c 48 degree Celsius. The Battery charging current channel represents
49 battery charging current in mA. 49 battery charging current in mA.
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