| 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 |