Kernel driver mc13783-adc¶
Supported chips:
Freescale MC13783
Prefix: ‘mc13783’
Datasheet:https://www.nxp.com/docs/en/data-sheet/MC13783.pdf
Freescale MC13892
Prefix: ‘mc13892’
Datasheet:https://www.nxp.com/docs/en/data-sheet/MC13892.pdf
Authors:
- Sascha Hauer <s.hauer@pengutronix.de>
- Luotao Fu <l.fu@pengutronix.de>
Description¶
The Freescale MC13783 and MC13892 are Power Management and Audio Circuits.Among other things they contain a 10-bit A/D converter. The converter has 16(MC13783) resp. 12 (MC13892) channels which can be used in different modes. TheA/D converter has a resolution of 2.25mV.
Some channels can be used as General Purpose inputs or in a dedicated mode witha chip internal scaling applied .
Currently the driver only supports the Application Supply channel (BP / BPSNS),the General Purpose inputs and touchscreen.
See the following tables for the meaning of the different channels and theirchip internal scaling:
- MC13783:
| 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 /0 - 20V | /5/10 |
| 4 | Charger Current (CHRGISNSP-CHRGISNSN) | -0.25 - 0.25V | x4 |
| 5 | General Purpose ADIN5 / Battery Pack Thermistor | 0 - 2.30V | No |
| 6 | General Purpose ADIN6 / Backup Voltage (LICELL) | 0 - 2.30V /1.50 - 3.50V | No /-1.20V |
| 7 | General Purpose ADIN7 / UID / Die Temperature | 0 - 2.30V /0 - 2.55V / | No /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 |
- MC13892:
| Channel | Signal | Input Range | Scaling |
|---|---|---|---|
| 0 | Battery Voltage (BATT) | 0 - 4.8V | /2 |
| 1 | Battery Current (BATT - BATTISNSCC) | -60 - 60 mV | x20 |
| 2 | Application Supply (BPSNS) | 0 - 4.8V | /2 |
| 3 | Charger Voltage (CHRGRAW) | 0 - 12V /0 - 20V | /5/10 |
| 4 | Charger Current (CHRGISNS-BPSNS) /Touchscreen X-plate 1 | -0.3 - 0.3V /0 - 2.4V | x4 /No |
| 5 | General Purpose ADIN5 / Battery Pack Thermistor | 0 - 2.4V | No |
| 6 | General Purpose ADIN6 / Backup Voltage (LICELL)Backup Voltage (LICELL) | 0 - 2.4V /0 - 3.6V | Nox2/3 |
| 7 | General Purpose ADIN7 / UID / Die Temperature | 0 - 2.4V /0 - 4.8V | No //2 |
| 12 | General Purpose TSX1 / Touchscreen X-plate 1 | 0 - 2.4V | No |
| 13 | General Purpose TSX2 / Touchscreen X-plate 2 | 0 - 2.4V | No |
| 14 | General Purpose TSY1 / Touchscreen Y-plate 1 | 0 - 2.4V | No |
| 15 | General Purpose TSY2 / Touchscreen Y-plate 2 | 0 - 2.4V | No |