Hi Kiran,
On Fri, 2014-09-19 at 15:49 +0530, Kiran Padwal wrote:
> 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 <iiva...@mm-sol.com>
> > ---
> > .../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.
Right.
>
> > + 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,
> ^
>
Right. I am not sure why I am not getting this warning.
> > + int ret;
> > +
> > + ret = iadc_read(iadc, IADC_MODE_CTL, &mode);
> > + if (ret < 0)
> > + return;
> > +
> > + ret = iadc_read(iadc, IADC_DIG_PARAM, &dig);
>
Thank you for review.
Regards,
Ivan
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