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