diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-18 09:22:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-18 09:22:36 -0700 |
| commit | 6f130478e24d810078c3f0ee292bcc4ec034dcce (patch) | |
| tree | 1c782ccceaf998e9e23862094588c125ee6f38af /Documentation/hwmon/wm831x | |
| parent | 6f128fa344833bf8bf076a51d14401661c146470 (diff) | |
| parent | 75f2ba8f0006440e720e47ae14c917e07c452d72 (diff) | |
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (55 commits)
regulator: Voltage count for AB3100
mfd: Convert WM8350 to use request_threaded_irq()
mfd: Update MAINTAINERS patterns for WM831x
mfd: Fix twl4030-power warnings
regulator: AB3100 support
rtc: AB3100 RTC support
mfd: Fix ab3100-otp build failure
mfd: OMAP: Board-specifc twl4030 DPS scripts for RX51 board
mfd: Print warning for twl4030 out-of-order script loading
mfd: Add support for TWL4030/5030 dynamic power switching
mfd: AB3100 OTP readout
regulator: Add Freescale MC13783 driver
mfd: Add Freescale MC13783 driver
mfd: AB3100 disable irq nosync
mfd: AB3100 alter default setting
mfd: AB3100 propagate error
mfd: AB3100 accessor function cleanups
rtc: Add support for RTCs on Wolfson WM831x devices
regulator: get pcap data from the parent device
input: PCAP2 misc input driver
...
Diffstat (limited to 'Documentation/hwmon/wm831x')
| -rw-r--r-- | Documentation/hwmon/wm831x | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/hwmon/wm831x b/Documentation/hwmon/wm831x new file mode 100644 index 00000000000..24f47d8f6a4 --- /dev/null +++ b/Documentation/hwmon/wm831x @@ -0,0 +1,37 @@ +Kernel driver wm831x-hwmon +========================== + +Supported chips: + * Wolfson Microelectronics WM831x PMICs + Prefix: 'wm831x' + Datasheet: + http://www.wolfsonmicro.com/products/WM8310 + http://www.wolfsonmicro.com/products/WM8311 + http://www.wolfsonmicro.com/products/WM8312 + +Authors: Mark Brown <broonie@opensource.wolfsonmicro.com> + +Description +----------- + +The WM831x series of PMICs include an AUXADC which can be used to +monitor a range of system operating parameters, including the voltages +of the major supplies within the system. Currently the driver provides +reporting of all the input values but does not provide any alarms. + +Voltage Monitoring +------------------ + +Voltages are sampled by a 12 bit ADC. Voltages in milivolts are 1.465 +times the ADC value. + +Temperature Monitoring +---------------------- + +Temperatures are sampled by a 12 bit ADC. Chip and battery temperatures +are available. The chip temperature is calculated as: + + Degrees celsius = (512.18 - data) / 1.0983 + +while the battery temperature calculation will depend on the NTC +thermistor component. |