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Date: Mon, 20 Apr 2020 17:02:44 -0500 From: Rob Herring <robh@...nel.org> To: Jishnu Prakash <jprakash@...eaurora.org> Cc: agross@...nel.org, bjorn.andersson@...aro.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, mka@...omium.org, linus.walleij@...aro.org, Jonathan.Cameron@...wei.com, smohanad@...eaurora.org, kgunda@...eaurora.org, aghayal@...eaurora.org, Jonathan Cameron <jic23@...nel.org>, Hartmut Knaack <knaack.h@....de>, Lars-Peter Clausen <lars@...afoo.de>, Peter Meerwald-Stadler <pmeerw@...erw.net>, Mark Rutland <mark.rutland@....com>, linux-iio@...r.kernel.org, linux-arm-msm@...r.kernel.org, linux-arm-msm-owner@...r.kernel.org Subject: Re: [PATCH V2 2/3] iio: adc: Add PMIC7 ADC bindings On Wed, Apr 15, 2020 at 02:47:45PM +0530, Jishnu Prakash wrote: > Add documentation for PMIC7 ADC peripheral. > For the PMIC7-type PMICs, ADC peripheral is present in HW for the > following PMICs: PMK8350, PM8350, PM8350b, PMR735a and PMR735b. > Of these, only the ADC peripheral on PMK8350 is exposed directly to SW. > If SW needs to communicate with ADCs on other PMICs, it specifies the > PMIC to PMK8350 through the newly added SID register and communication > between PMK8350 ADC and other PMIC ADCs is carried out through > PBS(Programmable Boot Sequence) at the firmware level. > > In addition, add definitions for ADC channels and virtual channel > definitions (combination of ADC channel number and PMIC SID number) > per PMIC, to be used by ADC clients for PMIC7. > > Signed-off-by: Jishnu Prakash <jprakash@...eaurora.org> > --- > .../bindings/iio/adc/qcom,spmi-vadc.yaml | 52 +++++++++++-- > include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h | 67 ++++++++++++++++ > include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h | 88 ++++++++++++++++++++++ > include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h | 46 +++++++++++ > include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h | 28 +++++++ > include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h | 28 +++++++ > include/dt-bindings/iio/qcom,spmi-vadc.h | 78 ++++++++++++++++++- > 7 files changed, 380 insertions(+), 7 deletions(-) > create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h > create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h > create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h > create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h > create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h > > diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml > index 8273981..62aa311 100644 > --- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml > +++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml > @@ -13,7 +13,7 @@ maintainers: > description: | > SPMI PMIC voltage ADC (VADC) provides interface to clients to read > voltage. The VADC is a 15-bit sigma-delta ADC. > - SPMI PMIC5 voltage ADC (ADC) provides interface to clients to read > + SPMI PMIC5/PMIC7 voltage ADC (ADC) provides interface to clients to read > voltage. The VADC is a 16-bit sigma-delta ADC. > > properties: > @@ -28,6 +28,7 @@ properties: > - qcom,spmi-vadc > - qcom,spmi-adc5 > - qcom,spmi-adc-rev2 > + - qcom,spmi-adc7 > > reg: > description: VADC base address in the SPMI PMIC register map > @@ -70,6 +71,8 @@ patternProperties: > description: | > ADC channel number. > See include/dt-bindings/iio/qcom,spmi-vadc.h > + For PMIC7 ADC, the channel numbers are specified separately per PMIC > + in the PMIC-specific files in include/dt-bindings/iio/. > > label: > $ref: /schemas/types.yaml#/definitions/string > @@ -89,6 +92,8 @@ patternProperties: > of 512 will be used. > - For compatible property "qcom,spmi-adc5", valid values are 250, 420 > and 840. If property is not found, default value of 840 is used. > + - For compatible property "qcom,spmi-adc7", valid values are 85, 340 > + and 1360. If property is not found, default value of 1360 is used. We express constraints in schema now, don't duplicate with free form text. > - For compatible property "qcom,spmi-adc-rev2", valid values are 256, > 512 and 1024. If property is not present, default value is 1024. > > @@ -122,11 +127,11 @@ patternProperties: > channel calibration. If property is not found, channel will be > calibrated with 0.625V and 1.25V reference channels, also > known as absolute calibration. > - - For compatible property "qcom,spmi-adc5" and "qcom,spmi-adc-rev2", > - if this property is specified VADC will use the VDD reference (1.875V) > - and GND for channel calibration. If property is not found, channel > - will be calibrated with 0V and 1.25V reference channels, also known > - as absolute calibration. > + - For compatible property "qcom,spmi-adc5", "qcom,spmi-adc7" and > + "qcom,spmi-adc-rev2", if this property is specified VADC will use > + the VDD reference (1.875V) and GND for channel calibration. If > + property is not found, channel will be calibrated with 0V and 1.25V > + reference channels, also known as absolute calibration. > type: boolean > > qcom,hw-settle-time: > @@ -149,6 +154,12 @@ patternProperties: > Certain controller digital versions have valid values of > 15, 100, 200, 300, 400, 500, 600, 700, 1, 2, 4, 8, 16, 32, 64, 128 ms > If property is not found, channel will use 15us. > + - For compatible property "qcom,spmi-adc7", delay = 15us for > + value 0, 100us * (value) for values < 8, 1ms for value 8 > + and 2ms * (value - 8) otherwise. > + Valid values are: 15, 100, 200, 300, 400, 500, 600, 700, 1000, 2000, > + 4000, 8000, 16000, 32000, 64000, 128000 us. > + If property is not found, channel will use 15us. > > qcom,avg-samples: > $ref: /schemas/types.yaml#/definitions/uint32 > @@ -160,6 +171,9 @@ patternProperties: > - For compatible property "qcom,spmi-vadc", valid values > are: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 > If property is not found, 1 sample will be used. > + - For compatible property "qcom,spmi-adc5", "qcom,spmi-adc7" > + and "qcom,spmi-adc-rev2", valid values are: 1, 2, 4, 8, 16. > + If property is not found, 1 sample will be used. > > required: > - reg > @@ -244,6 +258,32 @@ allOf: > enum: [ 1, 2, 4, 8, 16 ] > default: 1 > > + - if: > + properties: > + compatible: > + contains: > + const: qcom,spmi-adc7 > + > + then: > + patternProperties: > + "^.*@[0-9a-fx]+$": 'x' should not be in unit-addresses. > + properties: > + qcom,decimation: > + items: Not an array, so 'items' doesn't make sense here. > + enum: [ 85, 340, 1360 ] > + default: 1360 > + > + qcom,hw-settle-time: > + items: > + enum: [ 15, 100, 200, 300, 400, 500, 600, 700, 1000, 2000, 4000, > + 8000, 16000, 32000, 64000, 128000 ] > + default: 15 > + > + qcom,avg-samples: > + items: > + enum: [ 1, 2, 4, 8, 16 ] > + default: 1 > + > examples: > - | > spmi_bus {
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