VADC/IADC peripheral is supported from PMIC 2.0 onwards.
Add version check to allow VADC/IADC reads if the
version is supported. Add probe defereal api for clients
who need to know if the ADC driver is ready. There is a
bug where the completion is not initialized. Fix it
by initializing it. Add support to disable the peripheral
after the ADC is read and enable it before starting a
conversion.
Add scaling functions to support reading the die temperature,
XO_THERM, batt_therm and batt_id. Add the ratiometric
calibration routine that uses the vref/gnd for calibration.
The ratiometric calibration is used for calibrating xo_therm,
batt_therm, batt_id.
Update the gain value used for calibration on the IADC
peripheral. PMIC 2.0 IADC peripheral uses 17.857mV instead
of 25mV for its gain calibration.
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
(cherry picked from commit 5ace110e2165fba66227e18154d58b0e6cbb24b2)
Change-Id: I37b02de53ea2bed913c30261624c31a1ae57131c
Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>
Fix reading/writing to the correct ADC peripheral offset
address during SPMI read/writes. While adding multiple
channels an incorrect channel index initialization causes
the ADC reads to occur only on one channel. Fix it by
initializing the channel index only once at init.
The configure api has few register read/writes done
without using the bit mask field. Fix it by reading
the register and updating only the concerned bits.
Also add more comments to the configure api to list
out the steps for each register configuration and
fix using the correct print statements on error.
Change-Id: I0ce67163c5f27021f5fb0905fe601f4b1e0ee8b8
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
The QPNP IADC driver supports the user bank
peripheral of the current ADC(IADC).
IADC is a 16 bit ADC used for measuring current.
The single measurement mode is supported to read
current from upto seven channel configuration.
Clients can read the internal/external Rsense,
CSP_EX, CSN_RX along with gain and offset
calibraton channels.
Change-Id: I7e5ae3fc70878d16827d33705853a36bb0aa04f6
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
The QPNP VADC driver supports the User Bank Peripheral of
the voltage ADC(VADC).
VADC is a 15 bit ADC that measures signals through the
Main analog multiplexer (AMUX) and PREMUX. The driver
arbitrates the request to issue ADC read requests.
VADC driver includes support for the conversion sequencer.
The conversion sequencer is a HW triggered signal to start
ADC measurement on trigger events for PA ON,
camera flash and TX threshold.
The AMUX supports external pull-ups simultaneously. Clients
can select the appropriate AMUX input channel to measure the
ADC for the intended pull up configuration.
Change-Id: I8886968ccec54ad03334b113b4516d4d200e0da8
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
