Kernel driver mc13783-adc
=========================
Supported chips:
* Freescale Atlas MC13783
Prefix: 'mc13783'
Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1
* Freescale Atlas MC13892
Prefix: 'mc13892'
Datasheet: http://cache.freescale.com/files/analog/doc/data_sheet/MC13892.pdf?fsrch=1&sr=1
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 / /5
0 - 20V /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 / 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
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 / /5
0 - 20V /10
4 Charger Current (CHRGISNS-BPSNS) / -0.3 - 0.3V / x4 /
Touchscreen X-plate 1 0 - 2.4V No
5 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.4V No
6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.4V / No
Backup Voltage (LICELL) 0 - 3.6V x2/3
7 General Purpose ADIN7 / UID / Die Temperature 0 - 2.4V / No /
0 - 4.8V /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