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1 | Kernel driver mc13783-adc |
2 | ========================= | |
3 | ||
4 | Supported chips: | |
5 | * Freescale Atlas MC13783 | |
0c273215 | 6 | Prefix: 'mc13783' |
93ee0a75 | 7 | Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1 |
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8 | * Freescale Atlas MC13892 |
9 | Prefix: 'mc13892' | |
10 | Datasheet: http://cache.freescale.com/files/analog/doc/data_sheet/MC13892.pdf?fsrch=1&sr=1 | |
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11 | |
12 | Authors: | |
13 | Sascha Hauer <s.hauer@pengutronix.de> | |
14 | Luotao Fu <l.fu@pengutronix.de> | |
15 | ||
16 | Description | |
17 | ----------- | |
18 | ||
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19 | The Freescale MC13783 and MC13892 are Power Management and Audio Circuits. |
20 | Among other things they contain a 10-bit A/D converter. The converter has 16 | |
21 | (MC13783) resp. 12 (MC13892) channels which can be used in different modes. The | |
22 | A/D converter has a resolution of 2.25mV. | |
93ee0a75 | 23 | |
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24 | Some channels can be used as General Purpose inputs or in a dedicated mode with |
25 | a chip internal scaling applied . | |
93ee0a75 | 26 | |
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27 | Currently the driver only supports the Application Supply channel (BP / BPSNS), |
28 | the General Purpose inputs and touchscreen. | |
93ee0a75 | 29 | |
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30 | See the following tables for the meaning of the different channels and their |
31 | chip internal scaling: | |
32 | ||
33 | MC13783: | |
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34 | Channel Signal Input Range Scaling |
35 | ------------------------------------------------------------------------------- | |
36 | 0 Battery Voltage (BATT) 2.50 - 4.65V -2.40V | |
37 | 1 Battery Current (BATT - BATTISNS) -50 - 50 mV x20 | |
38 | 2 Application Supply (BP) 2.50 - 4.65V -2.40V | |
39 | 3 Charger Voltage (CHRGRAW) 0 - 10V / /5 | |
40 | 0 - 20V /10 | |
0c273215 | 41 | 4 Charger Current (CHRGISNSP-CHRGISNSN) -0.25 - 0.25V x4 |
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42 | 5 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V No |
43 | 6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V / No / | |
44 | 1.50 - 3.50V -1.20V | |
45 | 7 General Purpose ADIN7 / UID / Die Temperature 0 - 2.30V / No / | |
46 | 0 - 2.55V / x0.9 / No | |
47 | 8 General Purpose ADIN8 0 - 2.30V No | |
48 | 9 General Purpose ADIN9 0 - 2.30V No | |
49 | 10 General Purpose ADIN10 0 - 2.30V No | |
50 | 11 General Purpose ADIN11 0 - 2.30V No | |
51 | 12 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.30V No | |
52 | 13 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.30V No | |
53 | 14 General Purpose TSY1 / Touchscreen Y-plate 1 0 - 2.30V No | |
54 | 15 General Purpose TSY2 / Touchscreen Y-plate 2 0 - 2.30V No | |
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55 | |
56 | MC13892: | |
57 | Channel Signal Input Range Scaling | |
58 | ------------------------------------------------------------------------------- | |
59 | 0 Battery Voltage (BATT) 0 - 4.8V /2 | |
60 | 1 Battery Current (BATT - BATTISNSCC) -60 - 60 mV x20 | |
61 | 2 Application Supply (BPSNS) 0 - 4.8V /2 | |
62 | 3 Charger Voltage (CHRGRAW) 0 - 12V / /5 | |
63 | 0 - 20V /10 | |
64 | 4 Charger Current (CHRGISNS-BPSNS) / -0.3 - 0.3V / x4 / | |
65 | Touchscreen X-plate 1 0 - 2.4V No | |
66 | 5 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.4V No | |
67 | 6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.4V / No | |
68 | Backup Voltage (LICELL) 0 - 3.6V x2/3 | |
69 | 7 General Purpose ADIN7 / UID / Die Temperature 0 - 2.4V / No / | |
70 | 0 - 4.8V /2 | |
71 | 12 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.4V No | |
72 | 13 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.4V No | |
73 | 14 General Purpose TSY1 / Touchscreen Y-plate 1 0 - 2.4V No | |
74 | 15 General Purpose TSY2 / Touchscreen Y-plate 2 0 - 2.4V No |