On Tue, Jul 06, 2021 at 02:34:49PM +0000, Vincent Pelletier wrote: > From: "Opensource [Steve Twiss]" <stwiss.opensource@xxxxxxxxxxx> > > Addition of HWMON documentation for the DA9063 driver. > > Signed-off-by: Opensource [Steve Twiss] <stwiss.opensource@xxxxxxxxxxx> > > Updated temperature formula, as of datasheet rev 2.3. > Converted to ReStructuredText. > > Signed-off-by: Vincent Pelletier <plr.vincent@xxxxxxxxx> > --- > Changes in v2: > - ReST-ified > > Originally submitted by Steve Twiss in 2014: > https://marc.info/?l=linux-kernel&m=139560868209856&w=2 > > Documentation/hwmon/da9063.rst | 73 ++++++++++++++++++++++++++++++++++ Needs to be added to index.rst. > 1 file changed, 73 insertions(+) > create mode 100644 Documentation/hwmon/da9063.rst > > diff --git a/Documentation/hwmon/da9063.rst b/Documentation/hwmon/da9063.rst > new file mode 100644 > index 000000000000..aae69c58a5d6 > --- /dev/null > +++ b/Documentation/hwmon/da9063.rst > @@ -0,0 +1,73 @@ > +Kernel driver da9063-hwmon > +========================== > + > +Supported chips: > + > + * Dialog Semiconductor DA9063 PMIC > + > + Prefix: 'da9063' > + > + Datasheet: Publicly available at the Dialog Semiconductor website: > + > + http://www.dialog-semiconductor.com/products/power-management/DA9063 > + > +Authors: > + - S Twiss <stwiss.opensource@xxxxxxxxxxx> > + - Vincent Pelletier <plr.vincent@xxxxxxxxx> > + > +Description > +----------- > + > +The DA9063 PMIC provides a general purpose ADC with 10 bits of resolution. > +It uses track and hold circuitry with an analogue input multiplexer which > +allows the conversion of up to 9 different inputs: > + > +- Channel 0: VSYS_RES measurement of the system VDD (2.5 - 5.5V) > +- Channel 1: ADCIN1_RES high impedance input (0 - 2.5V) > +- Channel 2: ADCIN2_RES high impedance input (0 - 2.5V) > +- Channel 3: ADCIN3_RES high impedance input (0 - 2.5V) > +- Channel 4: Tjunc measurement of internal temperature sensor > +- Channel 5: VBBAT measurement of the backup battery voltage (0 - 5.0V) > +- Channel 6: N/A Reserved > +- Channel 7: N/A Reserved > +- Channel 8: MON1_RES group 1 internal regulators voltage (0 - 5.0V) > +- Channel 9: MON2_RES group 2 internal regulators voltage (0 - 5.0V) > +- Channel 10: MON3_RES group 3 internal regulators voltage (0 - 5.0V) > + > +The MUX selects from and isolates the 9 inputs and presents the channel to > +be measured to the ADC input. When selected, an input amplifier on the VSYS > +channel subtracts the VDDCORE reference voltage and scales the signal to the > +correct value for the ADC. > + > +The analog ADC includes current sources at ADC_IN1, ADC_IN2 and ADC_IN3 to > +support resistive measurements. > + > +Channels 1, 2 and 3 current source capability can be set through the ADC > +thresholds ADC_CFG register and values for ADCIN1_CUR, ADCIN2_CUR and > +ADCIN3_CUR. Settings for ADCIN1_CUR and ADCIN2_CUR are 1.0, 2.0, 10 and > +40 micro Amps. The setting for ADCIN3_CUR is 10 micro Amps. > + > +Voltage Monitoring > +------------------ > + > +The manual measurement allows monitoring of the system voltage VSYS, the > +auxiliary channels ADCIN1, ADCIN2 and ADCIN3, and a VBBAT measurement of > +the backup battery voltage (0 - 5.0V). The manual measurements store 10 > +bits of ADC resolution. > + > +The manual ADC measurements attributes described above are supported by > +the driver. > + > +The automatic ADC measurement is not supported by the driver. > + > +Temperature Monitoring > +---------------------- > + > +Temperatures are sampled by a 10 bit ADC. Junction temperatures > +are monitored by the ADC channels. > + > +The junction temperature is calculated: > + > + Degrees celsius = -0.398 * (ADC_RES - T_OFFSET) + 330; > + > +The junction temperature attribute is supported by the driver. > -- > 2.32.0 >
