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. The A/D converter has a resolution of 2.25mV.
Some channels can be used as General Purpose inputs or in a dedicated mode with a 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 their chip 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 |
No x2/3 |
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 |