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
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