Hi Ivan, On Thursday 18 September 2014 06:45 PM, Ivan T. Ivanov wrote: > The current ADC is peripheral of Qualcomm SPMI PMIC chips. It has > 16 bits resolution and register space inside PMIC accessible across > SPMI bus. > > The driver registers itself through IIO interface. > > Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx> > --- > .../devicetree/bindings/iio/adc/qcom,spmi-iadc.txt | 61 ++ <snip> > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig > index 11b048a..77274e4 100644 > --- a/drivers/iio/adc/Kconfig > +++ b/drivers/iio/adc/Kconfig > @@ -279,4 +279,15 @@ config XILINX_XADC > The driver can also be build as a module. If so, the module will be called > xilinx-xadc. > > +config QCOM_SPMI_IADC > + tristate "Qualcomm SPMI PMIC current ADC" > + select REGMAP_SPMI > + depends on IIO May be you need to add "SPMI" in depends on because without enabling that it breaks. > + help > + This is the IIO Current ADC driver for Qualcomm QPNP IADC Chip. > + > + The driver supports single mode operation to read from upto seven channel > + configuration that include reading the external/internal Rsense, CSP_EX, > + CSN_EX pair along with the gain and offset calibration. > + > endmenu <snip> > + > + return iadc_write(iadc, IADC_EN_CTL1, data); > +} > + > +static void iadc_status_show(struct iadc_chip *iadc) > +{ > + u8 mode, sta1, chan, dig, en, req; During compilation, getting a waring as below for all variables, rivers/iio/adc/qcom-spmi-iadc.c: In function ‘iadc_poll_wait_eoc’: drivers/iio/adc/qcom-spmi-iadc.c:227:10: warning: ‘en’ may be used uninitialized in this function [-Wmaybe-uninitialized] dev_warn(iadc->dev, ^ > + int ret; > + > + ret = iadc_read(iadc, IADC_MODE_CTL, &mode); > + if (ret < 0) > + return; > + > + ret = iadc_read(iadc, IADC_DIG_PARAM, &dig); Thanks, --Kiran -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html