diff options
| author | Luotao Fu <l.fu@pengutronix.de> | 2009-12-09 14:35:58 -0500 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-12-09 14:35:58 -0500 |
| commit | 93ee0a75f6e4b2c7ec20fd8f4ace87f88ba785b9 (patch) | |
| tree | ced868220c593e2cdfbf51edf24368fe8061ce40 /Documentation | |
| parent | d1ebd59a74d764ab74cda8d09589b7ab5f5529fd (diff) | |
hwmon: Add Freescale MC13783 ADC driver
This driver provides support for the ADC integrated into the
Freescale MC13783 PMIC.
Signed-off-by: Luotao Fu <l.fu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Cc: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/hwmon/mc13783-adc | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/hwmon/mc13783-adc b/Documentation/hwmon/mc13783-adc new file mode 100644 index 000000000000..044531a86405 --- /dev/null +++ b/Documentation/hwmon/mc13783-adc | |||
| @@ -0,0 +1,50 @@ | |||
| 1 | Kernel driver mc13783-adc | ||
| 2 | ========================= | ||
| 3 | |||
| 4 | Supported chips: | ||
| 5 | * Freescale Atlas MC13783 | ||
| 6 | Prefix: 'mc13783_adc' | ||
| 7 | Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1 | ||
| 8 | |||
| 9 | Authors: | ||
| 10 | Sascha Hauer <s.hauer@pengutronix.de> | ||
| 11 | Luotao Fu <l.fu@pengutronix.de> | ||
| 12 | |||
| 13 | Description | ||
| 14 | ----------- | ||
| 15 | |||
| 16 | The Freescale MC13783 is a Power Management and Audio Circuit. Among | ||
| 17 | other things it contains a 10-bit A/D converter. The converter has 16 | ||
| 18 | channels which can be used in different modes. | ||
| 19 | The A/D converter has a resolution of 2.25mV. Channels 0-4 have | ||
| 20 | a dedicated meaning with chip internal scaling applied. Channels 5-7 | ||
| 21 | can be used as general purpose inputs or alternatively in a dedicated | ||
| 22 | mode. Channels 12-15 are occupied by the touchscreen if it's active. | ||
| 23 | |||
| 24 | Currently the driver only supports channels 2 and 5-15 with no alternative | ||
| 25 | modes for channels 5-7. | ||
| 26 | |||
| 27 | See this table for the meaning of the different channels and their chip | ||
| 28 | internal scaling: | ||
| 29 | |||
| 30 | Channel Signal Input Range Scaling | ||
| 31 | ------------------------------------------------------------------------------- | ||
| 32 | 0 Battery Voltage (BATT) 2.50 - 4.65V -2.40V | ||
| 33 | 1 Battery Current (BATT - BATTISNS) -50 - 50 mV x20 | ||
| 34 | 2 Application Supply (BP) 2.50 - 4.65V -2.40V | ||
| 35 | 3 Charger Voltage (CHRGRAW) 0 - 10V / /5 | ||
| 36 | 0 - 20V /10 | ||
| 37 | 4 Charger Current (CHRGISNSP-CHRGISNSN) -0.25V - 0.25V x4 | ||
| 38 | 5 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V No | ||
| 39 | 6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V / No / | ||
| 40 | 1.50 - 3.50V -1.20V | ||
| 41 | 7 General Purpose ADIN7 / UID / Die Temperature 0 - 2.30V / No / | ||
| 42 | 0 - 2.55V / x0.9 / No | ||
| 43 | 8 General Purpose ADIN8 0 - 2.30V No | ||
| 44 | 9 General Purpose ADIN9 0 - 2.30V No | ||
| 45 | 10 General Purpose ADIN10 0 - 2.30V No | ||
| 46 | 11 General Purpose ADIN11 0 - 2.30V No | ||
| 47 | 12 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.30V No | ||
| 48 | 13 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.30V No | ||
| 49 | 14 General Purpose TSY1 / Touchscreen Y-plate 1 0 - 2.30V No | ||
| 50 | 15 General Purpose TSY2 / Touchscreen Y-plate 2 0 - 2.30V No | ||