1*4882a593SmuzhiyunKernel driver twl4030-madc 2*4882a593Smuzhiyun========================== 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunSupported chips: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun * Texas Instruments TWL4030 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun Prefix: 'twl4030-madc' 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunAuthors: 12*4882a593Smuzhiyun J Keerthy <j-keerthy@ti.com> 13*4882a593Smuzhiyun 14*4882a593SmuzhiyunDescription 15*4882a593Smuzhiyun----------- 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunThe Texas Instruments TWL4030 is a Power Management and Audio Circuit. Among 18*4882a593Smuzhiyunother things it contains a 10-bit A/D converter MADC. The converter has 16 19*4882a593Smuzhiyunchannels which can be used in different modes. 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun 22*4882a593SmuzhiyunSee this table for the meaning of the different channels 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun======= ========================================================== 25*4882a593SmuzhiyunChannel Signal 26*4882a593Smuzhiyun======= ========================================================== 27*4882a593Smuzhiyun0 Battery type(BTYPE) 28*4882a593Smuzhiyun1 BCI: Battery temperature (BTEMP) 29*4882a593Smuzhiyun2 GP analog input 30*4882a593Smuzhiyun3 GP analog input 31*4882a593Smuzhiyun4 GP analog input 32*4882a593Smuzhiyun5 GP analog input 33*4882a593Smuzhiyun6 GP analog input 34*4882a593Smuzhiyun7 GP analog input 35*4882a593Smuzhiyun8 BCI: VBUS voltage(VBUS) 36*4882a593Smuzhiyun9 Backup Battery voltage (VBKP) 37*4882a593Smuzhiyun10 BCI: Battery charger current (ICHG) 38*4882a593Smuzhiyun11 BCI: Battery charger voltage (VCHG) 39*4882a593Smuzhiyun12 BCI: Main battery voltage (VBAT) 40*4882a593Smuzhiyun13 Reserved 41*4882a593Smuzhiyun14 Reserved 42*4882a593Smuzhiyun15 VRUSB Supply/Speaker left/Speaker right polarization level 43*4882a593Smuzhiyun======= ========================================================== 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun 46*4882a593SmuzhiyunThe Sysfs nodes will represent the voltage in the units of mV, 47*4882a593Smuzhiyunthe temperature channel shows the converted temperature in 48*4882a593Smuzhiyundegree Celsius. The Battery charging current channel represents 49*4882a593Smuzhiyunbattery charging current in mA. 50