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[23.128.96.18]) by mx.google.com with ESMTP id o18si6911077ejb.193.2020.05.31.04.02.26; Sun, 31 May 2020 04:02:49 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728194AbgEaKo6 (ORCPT + 99 others); Sun, 31 May 2020 06:44:58 -0400 Received: from saturn.retrosnub.co.uk ([46.235.226.198]:49978 "EHLO saturn.retrosnub.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725813AbgEaKo6 (ORCPT ); Sun, 31 May 2020 06:44:58 -0400 Received: from archlinux (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) by saturn.retrosnub.co.uk (Postfix; Retrosnub mail submission) with ESMTPSA id B26589E749E; Sun, 31 May 2020 11:44:47 +0100 (BST) Date: Sun, 31 May 2020 11:44:45 +0100 From: Jonathan Cameron To: Jishnu Prakash Cc: agross@kernel.org, bjorn.andersson@linaro.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, mka@chromium.org, linus.walleij@linaro.org, Jonathan.Cameron@huawei.com, andy.shevchenko@gmail.com, amit.kucheria@verdurent.com, smohanad@codeaurora.org, kgunda@codeaurora.org, aghayal@codeaurora.org, Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Rob Herring , Mark Rutland , Amit Kucheria , linux-iio@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-msm-owner@vger.kernel.org Subject: Re: [PATCH V6 1/7] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format Message-ID: <20200531114445.27fbaf36@archlinux> In-Reply-To: <20200531113612.7bff6147@archlinux> References: <1590684869-15400-1-git-send-email-jprakash@codeaurora.org> <1590684869-15400-2-git-send-email-jprakash@codeaurora.org> <20200531113612.7bff6147@archlinux> X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 31 May 2020 11:36:12 +0100 Jonathan Cameron wrote: > On Thu, 28 May 2020 22:24:23 +0530 > Jishnu Prakash wrote: > > > Convert the adc bindings from .txt to .yaml format. > > > > Signed-off-by: Jishnu Prakash > > Reviewed-by: Amit Kucheria > > Reviewed-by: Rob Herring > > Acked-by: Linus Walleij > > Jishnu, Patch is fine, but I'd like to have seen a cover > letter and clear statement of changes from v5. > Applied to the togreg branch of iio.git and pushed out as testing. Note we've missed the merge window now for IIO so this will be in the following cycle. Thanks, J > Thanks, > > Jonathan > > > --- > > .../devicetree/bindings/iio/adc/qcom,spmi-vadc.txt | 173 -------------- > > .../bindings/iio/adc/qcom,spmi-vadc.yaml | 252 +++++++++++++++++++++ > > 2 files changed, 252 insertions(+), 173 deletions(-) > > delete mode 100644 Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt > > create mode 100644 Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml > > > > diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt > > deleted file mode 100644 > > index c878768..0000000 > > --- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt > > +++ /dev/null > > @@ -1,173 +0,0 @@ > > -Qualcomm's SPMI PMIC ADC > > - > > -- 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 > > - voltage. The VADC is a 16-bit sigma-delta ADC. > > - > > -VADC node: > > - > > -- compatible: > > - Usage: required > > - Value type: > > - Definition: Should contain "qcom,spmi-vadc". > > - Should contain "qcom,spmi-adc5" for PMIC5 ADC driver. > > - Should contain "qcom,spmi-adc-rev2" for PMIC rev2 ADC driver. > > - Should contain "qcom,pms405-adc" for PMS405 PMIC > > - > > -- reg: > > - Usage: required > > - Value type: > > - Definition: VADC base address in the SPMI PMIC register map. > > - > > -- #address-cells: > > - Usage: required > > - Value type: > > - Definition: Must be one. Child node 'reg' property should define ADC > > - channel number. > > - > > -- #size-cells: > > - Usage: required > > - Value type: > > - Definition: Must be zero. > > - > > -- #io-channel-cells: > > - Usage: required > > - Value type: > > - Definition: Must be one. For details about IIO bindings see: > > - Documentation/devicetree/bindings/iio/iio-bindings.txt > > - > > -- interrupts: > > - Usage: optional > > - Value type: > > - Definition: End of conversion interrupt. > > - > > -Channel node properties: > > - > > -- reg: > > - Usage: required > > - Value type: > > - Definition: ADC channel number. > > - See include/dt-bindings/iio/qcom,spmi-vadc.h > > - > > -- label: > > - Usage: required for "qcom,spmi-adc5" and "qcom,spmi-adc-rev2" > > - Value type: > > - Definition: ADC input of the platform as seen in the schematics. > > - For thermistor inputs connected to generic AMUX or GPIO inputs > > - these can vary across platform for the same pins. Hence select > > - the platform schematics name for this channel. > > - > > -- qcom,decimation: > > - Usage: optional > > - Value type: > > - Definition: This parameter is used to decrease ADC sampling rate. > > - Quicker measurements can be made by reducing decimation ratio. > > - - For compatible property "qcom,spmi-vadc", valid values are > > - 512, 1024, 2048, 4096. If property is not found, default value > > - 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-adc-rev2", valid values are 256, > > - 512 and 1024. If property is not present, default value is 1024. > > - > > -- qcom,pre-scaling: > > - Usage: optional > > - Value type: > > - Definition: Used for scaling the channel input signal before the signal is > > - fed to VADC. The configuration for this node is to know the > > - pre-determined ratio and use it for post scaling. Select one from > > - the following options. > > - <1 1>, <1 3>, <1 4>, <1 6>, <1 20>, <1 8>, <10 81>, <1 10> > > - If property is not found default value depending on chip will be used. > > - > > -- qcom,ratiometric: > > - Usage: optional > > - Value type: > > - Definition: Channel calibration type. > > - - For compatible property "qcom,spmi-vadc", if this property is > > - specified VADC will use the VDD reference (1.8V) and GND for > > - 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. > > - > > -- qcom,hw-settle-time: > > - Usage: optional > > - Value type: > > - Definition: Time between AMUX getting configured and the ADC starting > > - conversion. The 'hw_settle_time' is an index used from valid values > > - and programmed in hardware to achieve the hardware settling delay. > > - - For compatible property "qcom,spmi-vadc" and "qcom,spmi-adc-rev2", > > - Delay = 100us * (hw_settle_time) for hw_settle_time < 11, > > - and 2ms * (hw_settle_time - 10) otherwise. > > - Valid values are: 0, 100, 200, 300, 400, 500, 600, 700, 800, > > - 900 us and 1, 2, 4, 6, 8, 10 ms. > > - If property is not found, channel will use 0us. > > - - For compatible property "qcom,spmi-adc5", delay = 15us for > > - value 0, 100us * (value) for values < 11, > > - and 2ms * (value - 10) otherwise. > > - Valid values are: 15, 100, 200, 300, 400, 500, 600, 700, 800, > > - 900 us and 1, 2, 4, 6, 8, 10 ms > > - 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. > > - > > -- qcom,avg-samples: > > - Usage: optional > > - Value type: > > - Definition: Number of samples to be used for measurement. > > - Averaging provides the option to obtain a single measurement > > - from the ADC that is an average of multiple samples. The value > > - selected is 2^(value). > > - - 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" and "qcom,spmi-adc-rev2", > > - valid values are: 1, 2, 4, 8, 16 > > - If property is not found, 1 sample will be used. > > - > > -NOTE: > > - > > -For compatible property "qcom,spmi-vadc" following channels, also known as > > -reference point channels, are used for result calibration and their channel > > -configuration nodes should be defined: > > -VADC_REF_625MV and/or VADC_SPARE1(based on PMIC version) VADC_REF_1250MV, > > -VADC_GND_REF and VADC_VDD_VADC. > > - > > -Example: > > - > > -#include > > -#include > > -/* ... */ > > - > > - /* VADC node */ > > - pmic_vadc: vadc@3100 { > > - compatible = "qcom,spmi-vadc"; > > - reg = <0x3100>; > > - interrupts = <0x0 0x31 0x0 IRQ_TYPE_EDGE_RISING>; > > - #address-cells = <1>; > > - #size-cells = <0>; > > - #io-channel-cells = <1>; > > - io-channel-ranges; > > - > > - /* Channel node */ > > - adc-chan@VADC_LR_MUX10_USB_ID { > > - reg = ; > > - qcom,decimation = <512>; > > - qcom,ratiometric; > > - qcom,hw-settle-time = <200>; > > - qcom,avg-samples = <1>; > > - qcom,pre-scaling = <1 3>; > > - }; > > - }; > > - > > - /* IIO client node */ > > - usb { > > - io-channels = <&pmic_vadc VADC_LR_MUX10_USB_ID>; > > - io-channel-names = "vadc"; > > - }; > > diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml > > new file mode 100644 > > index 0000000..de8d243 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml > > @@ -0,0 +1,252 @@ > > +# SPDX-License-Identifier: GPL-2.0-only > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/iio/adc/qcom,spmi-vadc.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Qualcomm's SPMI PMIC ADC > > + > > +maintainers: > > + - Andy Gross > > + - Bjorn Andersson > > + > > +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 > > + voltage. The VADC is a 16-bit sigma-delta ADC. > > + > > +properties: > > + compatible: > > + oneOf: > > + - items: > > + - const: qcom,pms405-adc > > + - const: qcom,spmi-adc-rev2 > > + > > + - items: > > + - enum: > > + - qcom,spmi-vadc > > + - qcom,spmi-adc5 > > + - qcom,spmi-adc-rev2 > > + > > + reg: > > + description: VADC base address in the SPMI PMIC register map > > + maxItems: 1 > > + > > + '#address-cells': > > + const: 1 > > + > > + '#size-cells': > > + const: 0 > > + > > + '#io-channel-cells': > > + const: 1 > > + > > + interrupts: > > + maxItems: 1 > > + description: > > + End of conversion interrupt. > > + > > +required: > > + - compatible > > + - reg > > + - '#address-cells' > > + - '#size-cells' > > + - '#io-channel-cells' > > + > > +patternProperties: > > + "^.*@[0-9a-f]+$": > > + type: object > > + description: | > > + Represents the external channels which are connected to the ADC. > > + For compatible property "qcom,spmi-vadc" following channels, also known as > > + reference point channels, are used for result calibration and their channel > > + configuration nodes should be defined: > > + VADC_REF_625MV and/or VADC_SPARE1(based on PMIC version) VADC_REF_1250MV, > > + VADC_GND_REF and VADC_VDD_VADC. > > + > > + properties: > > + reg: > > + description: | > > + ADC channel number. > > + See include/dt-bindings/iio/qcom,spmi-vadc.h > > + > > + label: > > + $ref: /schemas/types.yaml#/definitions/string > > + description: | > > + ADC input of the platform as seen in the schematics. > > + For thermistor inputs connected to generic AMUX or GPIO inputs > > + these can vary across platform for the same pins. Hence select > > + the platform schematics name for this channel. > > + > > + qcom,decimation: > > + $ref: /schemas/types.yaml#/definitions/uint32 > > + description: | > > + This parameter is used to decrease ADC sampling rate. > > + Quicker measurements can be made by reducing decimation ratio. > > + > > + qcom,pre-scaling: > > + description: | > > + Used for scaling the channel input signal before the signal is > > + fed to VADC. The configuration for this node is to know the > > + pre-determined ratio and use it for post scaling. It is a pair of > > + integers, denoting the numerator and denominator of the fraction by which > > + input signal is multiplied. For example, <1 3> indicates the signal is scaled > > + down to 1/3 of its value before ADC measurement. > > + If property is not found default value depending on chip will be used. > > + allOf: > > + - $ref: /schemas/types.yaml#/definitions/uint32-array > > + oneOf: > > + - items: > > + - const: 1 > > + - enum: [ 1, 3, 4, 6, 20, 8, 10 ] > > + > > + - items: > > + - const: 10 > > + - const: 81 > > + > > + qcom,ratiometric: > > + description: | > > + Channel calibration type. > > + - For compatible property "qcom,spmi-vadc", if this property is > > + specified VADC will use the VDD reference (1.8V) and GND for > > + 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. > > + type: boolean > > + > > + qcom,hw-settle-time: > > + $ref: /schemas/types.yaml#/definitions/uint32 > > + description: | > > + Time between AMUX getting configured and the ADC starting > > + conversion. The 'hw_settle_time' is an index used from valid values > > + and programmed in hardware to achieve the hardware settling delay. > > + > > + qcom,avg-samples: > > + $ref: /schemas/types.yaml#/definitions/uint32 > > + description: | > > + Number of samples to be used for measurement. > > + Averaging provides the option to obtain a single measurement > > + from the ADC that is an average of multiple samples. The value > > + selected is 2^(value). > > + > > + required: > > + - reg > > + > > +allOf: > > + - if: > > + properties: > > + compatible: > > + contains: > > + const: qcom,spmi-vadc > > + > > + then: > > + patternProperties: > > + "^.*@[0-9a-f]+$": > > + properties: > > + qcom,decimation: > > + enum: [ 512, 1024, 2048, 4096 ] > > + default: 512 > > + > > + qcom,hw-settle-time: > > + enum: [ 0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1, 2, > > + 4, 6, 8, 10 ] > > + default: 0 > > + > > + qcom,avg-samples: > > + enum: [ 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 ] > > + default: 1 > > + > > + - if: > > + properties: > > + compatible: > > + contains: > > + const: qcom,spmi-adc-rev2 > > + > > + then: > > + patternProperties: > > + "^.*@[0-9a-f]+$": > > + properties: > > + qcom,decimation: > > + enum: [ 256, 512, 1024 ] > > + default: 1024 > > + > > + qcom,hw-settle-time: > > + enum: [ 0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1, 2, > > + 4, 6, 8, 10 ] > > + default: 0 > > + > > + qcom,avg-samples: > > + enum: [ 1, 2, 4, 8, 16 ] > > + default: 1 > > + > > + - if: > > + properties: > > + compatible: > > + contains: > > + const: qcom,spmi-adc5 > > + > > + then: > > + patternProperties: > > + "^.*@[0-9a-f]+$": > > + properties: > > + qcom,decimation: > > + enum: [ 250, 420, 840 ] > > + default: 840 > > + > > + qcom,hw-settle-time: > > + enum: [ 15, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1, 2, > > + 4, 6, 8, 10, 16, 32, 64, 128 ] > > + default: 15 > > + > > + qcom,avg-samples: > > + enum: [ 1, 2, 4, 8, 16 ] > > + default: 1 > > + > > +examples: > > + - | > > + spmi_bus { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + /* VADC node */ > > + pmic_vadc: adc@3100 { > > + compatible = "qcom,spmi-vadc"; > > + reg = <0x3100>; > > + interrupts = <0x0 0x31 0x0 0x1>; > > + #address-cells = <1>; > > + #size-cells = <0>; > > + #io-channel-cells = <1>; > > + io-channel-ranges; > > + > > + /* Channel node */ > > + adc-chan@39 { > > + reg = <0x39>; > > + qcom,decimation = <512>; > > + qcom,ratiometric; > > + qcom,hw-settle-time = <200>; > > + qcom,avg-samples = <1>; > > + qcom,pre-scaling = <1 3>; > > + }; > > + > > + adc-chan@9 { > > + reg = <0x9>; > > + }; > > + > > + adc-chan@a { > > + reg = <0xa>; > > + }; > > + > > + adc-chan@e { > > + reg = <0xe>; > > + }; > > + > > + adc-chan@f { > > + reg = <0xf>; > > + }; > > + }; > > + }; >