1Kernel driver mc13783-adc 2========================= 3 4Supported chips: 5 * Freescale Atlas MC13783 6 Prefix: 'mc13783_adc' 7 Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1 8 9Authors: 10 Sascha Hauer <s.hauer@pengutronix.de> 11 Luotao Fu <l.fu@pengutronix.de> 12 13Description 14----------- 15 16The Freescale MC13783 is a Power Management and Audio Circuit. Among 17other things it contains a 10-bit A/D converter. The converter has 16 18channels which can be used in different modes. 19The A/D converter has a resolution of 2.25mV. Channels 0-4 have 20a dedicated meaning with chip internal scaling applied. Channels 5-7 21can be used as general purpose inputs or alternatively in a dedicated 22mode. Channels 12-15 are occupied by the touchscreen if it's active. 23 24Currently the driver only supports channels 2 and 5-15 with no alternative 25modes for channels 5-7. 26 27See this table for the meaning of the different channels and their chip 28internal scaling: 29 30Channel Signal Input Range Scaling 31------------------------------------------------------------------------------- 320 Battery Voltage (BATT) 2.50 - 4.65V -2.40V 331 Battery Current (BATT - BATTISNS) -50 - 50 mV x20 342 Application Supply (BP) 2.50 - 4.65V -2.40V 353 Charger Voltage (CHRGRAW) 0 - 10V / /5 36 0 - 20V /10 374 Charger Current (CHRGISNSP-CHRGISNSN) -0.25V - 0.25V x4 385 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V No 396 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V / No / 40 1.50 - 3.50V -1.20V 417 General Purpose ADIN7 / UID / Die Temperature 0 - 2.30V / No / 42 0 - 2.55V / x0.9 / No 438 General Purpose ADIN8 0 - 2.30V No 449 General Purpose ADIN9 0 - 2.30V No 4510 General Purpose ADIN10 0 - 2.30V No 4611 General Purpose ADIN11 0 - 2.30V No 4712 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.30V No 4813 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.30V No 4914 General Purpose TSY1 / Touchscreen Y-plate 1 0 - 2.30V No 5015 General Purpose TSY2 / Touchscreen Y-plate 2 0 - 2.30V No 51