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Date: Wed, 30 Jun 2021 10:51:14 +0530
From: skakit@...eaurora.org
To: Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Andy Gross <agross@...nel.org>, kgunda@...eaurora.org,
linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH V4] dt-bindings: pinctrl: qcom-pmic-gpio: Convert qcom
pmic gpio bindings to YAML
Hi Bjorn,
On 2021-06-11 09:38, Bjorn Andersson wrote:
> On Fri 21 May 01:30 CDT 2021, satya priya wrote:
>
>> Convert Qualcomm PMIC GPIO bindings from .txt to .yaml format.
>>
>
> While the structure of the binding is a proper binding, the definition
> of the pinctrl states doesn't properly represent what we need to be
> able
> to describe with this binding; see below.
>
> [..]
>> diff --git
>> a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.yaml
>> b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.yaml
>> new file mode 100644
>> index 0000000..d9024eb
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.yaml
>> @@ -0,0 +1,256 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/pinctrl/qcom,pmic-gpio.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm PMIC GPIO block
>> +
>> +maintainers:
>> + - Bjorn Andersson <bjorn.andersson@...ymobile.com>
>
> Please make that bjorn.andersson@...aro.org
>
Okay, will change it in next post.
>> +
>> +description: |
>
> I don't think you need this defined in literal style, so omit the '|'
>
OK.
>> + This binding describes the GPIO block(s) found in the 8xxx series
>> of
>> + PMIC's from Qualcomm.
>> +
>> +properties:
>> + compatible:
>> + items:
>> + - enum:
>> + - qcom,pm8005-gpio
>> + - qcom,pm8018-gpio
>> + - qcom,pm8038-gpio
>> + - qcom,pm8058-gpio
>> + - qcom,pm8916-gpio
>> + - qcom,pm8917-gpio
>> + - qcom,pm8921-gpio
>> + - qcom,pm8941-gpio
>> + - qcom,pm8950-gpio
>> + - qcom,pm8994-gpio
>> + - qcom,pm8998-gpio
>> + - qcom,pma8084-gpio
>> + - qcom,pmi8950-gpio
>> + - qcom,pmi8994-gpio
>> + - qcom,pmi8998-gpio
>> + - qcom,pms405-gpio
>> + - qcom,pm660-gpio
>
> Please keep these sorted alphabetically.
>
Okay.
>> + - qcom,pm660l-gpio
>> + - qcom,pm8150-gpio
>> + - qcom,pm8150b-gpio
>> + - qcom,pm8350-gpio
>> + - qcom,pm8350b-gpio
>> + - qcom,pm8350c-gpio
>> + - qcom,pmk8350-gpio
>> + - qcom,pm6150-gpio
>> + - qcom,pm6150l-gpio
>> + - qcom,pm7325-gpio
>> + - qcom,pmr735a-gpio
>> + - qcom,pmr735b-gpio
>> + - qcom,pm8008-gpio
>> + - qcom,pmx55-gpio
>> +
>> + - enum:
>> + - qcom,spmi-gpio
>> + - qcom,ssbi-gpio
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + interrupts:
>> + minItems: 1
>> + maxItems: 44
>> + description: |
>> + Must contain an array of encoded interrupt specifiers for
>> + each available GPIO
>
> We no longer specify "interrupts" but it seems we forgot to update the
> binding. So perhaps it's the right thing to keep it as part of the
> conversion and add a second patch that removes this.
>
Okay.
>> +
>> + '#interrupt-cells':
>> + const: 2
>> +
>> + interrupt-controller: true
>> +
>> + gpio-controller: true
>> +
>> + gpio-ranges:
>> + maxItems: 1
>> +
>> + '#gpio-cells':
>> + const: 2
>> + description: |
>> + The first cell will be used to define gpio number and the
>> + second denotes the flags for this gpio
>> +
>> + gpio-keys:
>
> This is the name of the pinctrl state defined in the example, as
> defined
> here we will only ever be able to describe the volume keys.
>
> You need to describe all valid states - and you need to support the two
> different nesting of the properties.
>
> See qcom,tlmm-common.yaml and how we use that in the various bindings.
>
Ok.
>> + type: object
>> + properties:
>> + volume-keys:
>> + type: object
>> + anyOf:
>> + - $ref: "pinmux-node.yaml"
>> + - $ref: "pincfg-node.yaml"
>> + properties:
>> + pins:
>> + description: |
>> + List of gpio pins affected by the properties
>> specified in
>> + this subnode. Valid pins are
>> + - gpio1-gpio4 for pm8005
>> + - gpio1-gpio6 for pm8018
>> + - gpio1-gpio12 for pm8038
>> + - gpio1-gpio40 for pm8058
>> + - gpio1-gpio4 for pm8916
>> + - gpio1-gpio38 for pm8917
>> + - gpio1-gpio44 for pm8921
>> + - gpio1-gpio36 for pm8941
>> + - gpio1-gpio8 for pm8950 (hole on gpio3)
>> + - gpio1-gpio22 for pm8994
>> + - gpio1-gpio26 for pm8998
>> + - gpio1-gpio22 for pma8084
>> + - gpio1-gpio2 for pmi8950
>> + - gpio1-gpio10 for pmi8994
>> + - gpio1-gpio12 for pms405 (holes on gpio1, gpio9
>> + and gpio10)
>> + - gpio1-gpio10 for pm8150 (holes on gpio2,
>> gpio5,
>> + gpio7 and gpio8)
>> + - gpio1-gpio12 for pm8150b (holes on gpio3,
>> gpio4
>> + and gpio7)
>> + - gpio1-gpio12 for pm8150l (hole on gpio7)
>> + - gpio1-gpio10 for pm8350
>> + - gpio1-gpio8 for pm8350b
>> + - gpio1-gpio9 for pm8350c
>> + - gpio1-gpio4 for pmk8350
>> + - gpio1-gpio10 for pm6150
>> + - gpio1-gpio12 for pm6150l
>> + - gpio1-gpio10 for pm7325
>> + - gpio1-gpio4 for pmr735a
>> + - gpio1-gpio4 for pmr735b
>> + - gpio1-gpio2 for pm8008
>> + - gpio1-gpio11 for pmx55 (holes on gpio3, gpio7,
>> gpio10
>> + and gpio11)
>> +
>> + items:
>> + pattern: "^gpio([0-9]+)$"
>> +
>> + function:
>> + items:
>> + - enum:
>> + - normal
>> + - paired
>> + - func1
>> + - func2
>> + - dtest1
>> + - dtest2
>> + - dtest3
>> + - dtest4
>> + - func3 # supported by LV/MV GPIO subtypes
>> + - func4 # supported by LV/MV GPIO subtypes
>> +
>> + bias-disable: true
>> +
>> + bias-pull-down: true
>> +
>> + bias-pull-up: true
>> +
>> + qcom,pull-up-strength:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + description: |
>> + Specifies the strength to use for pull up, if
>> selected.
>> + Valid values are defined in
>> + <dt-bindings/pinctrl/qcom,pmic-gpio.h>
>> + If this property is omitted 30uA strength will be
>> used
>> + if pull up is selected
>> +
>> + bias-high-impedance: true
>> +
>> + input-enable: true
>> +
>> + output-high: true
>> +
>> + output-low: true
>> +
>> + power-source: true
>> +
>> + qcom,drive-strength:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + description: |
>> + Selects the drive strength for the specified pins
>> + Valid drive strength values are defined in
>> + <dt-bindings/pinctrl/qcom,pmic-gpio.h>
>> + enum: [0, 1, 2, 3]
>> +
>> + drive-push-pull: true
>> +
>> + drive-open-drain: true
>> +
>> + drive-open-source: true
>> +
>> + qcom,analog-pass:
>> + $ref: /schemas/types.yaml#/definitions/flag
>> + description: |
>> + The specified pins are configured in
>> + analog-pass-through mode.
>> +
>> + qcom,atest:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + description: |
>> + Selects ATEST rail to route to GPIO when it's
>> + configured in analog-pass-through mode.
>> + enum: [1, 2, 3, 4]
>> +
>> + qcom,dtest-buffer:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + description: |
>> + Selects DTEST rail to route to GPIO when it's
>> + configured as digital input.
>> + enum: [1, 2, 3, 4]
>> +
>> + required:
>> + - pins
>> + - function
>> +
>> + additionalProperties: false
>> +
>> +additionalProperties: false
>> +
>> +required:
>> + - compatible
>> + - reg
>
> I think it makes sense to require gpio-controller, '#gpio-cells',
> gpio-ranges and interrupt-controller as well.
>
Ok, will add them too.
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
>> +
>> + pm8921_gpio: gpio@150 {
>> + compatible = "qcom,pm8921-gpio", "qcom,ssbi-gpio";
>> + reg = <0x150 0x160>;
>> + interrupts = <192 1>, <193 1>, <194 1>,
>> + <195 1>, <196 1>, <197 1>,
>> + <198 1>, <199 1>, <200 1>,
>> + <201 1>, <202 1>, <203 1>,
>> + <204 1>, <205 1>, <206 1>,
>> + <207 1>, <208 1>, <209 1>,
>> + <210 1>, <211 1>, <212 1>,
>> + <213 1>, <214 1>, <215 1>,
>> + <216 1>, <217 1>, <218 1>,
>> + <219 1>, <220 1>, <221 1>,
>> + <222 1>, <223 1>, <224 1>,
>> + <225 1>, <226 1>, <227 1>,
>> + <228 1>, <229 1>, <230 1>,
>> + <231 1>, <232 1>, <233 1>,
>> + <234 1>, <235 1>;
>
> As noted above, this list of interrupts should be omitted from the
> example - but better done separate from the conversion patch.
>
Okay.
> Thanks,
> Bjorn
>
Thanks,
Satya Priya
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