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Message-ID: <1d7e38197bcaec99dd4e669b5dc8e31c@codeaurora.org>
Date: Fri, 07 Feb 2020 12:16:46 +0530
From: kgunda@...eaurora.org
To: Rob Herring <robh@...nel.org>
Cc: Stephen Boyd <swboyd@...omium.org>, Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Lee Jones <lee.jones@...aro.org>,
Mark Rutland <mark.rutland@....com>,
devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org, rnayak@...eaurora.org,
linux-arm-msm-owner@...r.kernel.org
Subject: Re: [PATCH V3 1/2] mfd: qcom-spmi-pmic: Convert bindings to .yaml
format
On 2020-02-07 03:36, Rob Herring wrote:
> On Thu, Feb 06, 2020 at 11:06:55AM -0800, Stephen Boyd wrote:
>> Quoting Kiran Gunda (2020-02-06 05:55:26)
>> > Convert the bindings from .txt to .yaml format.
>> >
>> > Signed-off-by: Kiran Gunda <kgunda@...eaurora.org>
>> > ---
>>
>> Did something change? Is there a cover letter?
>>
>> > diff --git a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
>> > new file mode 100644
>> > index 0000000..affc169
>> > --- /dev/null
>> > +++ b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
>> > @@ -0,0 +1,115 @@
>> > +# SPDX-License-Identifier: GPL-2.0-only
>> > +%YAML 1.2
>> > +---
>> > +$id: http://devicetree.org/schemas/bindings/mfd/qcom,spmi-pmic.yaml#
>> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> > +
>> > +title: Qualcomm SPMI PMICs multi-function device bindings
>> > +
>> > +maintainers:
>> > + - Lee Jones <lee.jones@...aro.org>
>> > + - Stephen Boyd <sboyd@...eaurora.org>
>>
>> Please change this to sboyd@...nel.org
>
> Should be the h/w owner, not applier of changes.
>
Ok.. I will remove it in next post.
>>
>> > +
>> > +description: |
>> > + The Qualcomm SPMI series presently includes PM8941, PM8841 and PMA8084
>> > + PMICs. These PMICs use a QPNP scheme through SPMI interface.
>>
>> This first sentence will need continual updating. Please drop it.
>>
>> > + QPNP is effectively a partitioning scheme for dividing the SPMI extended
>> > + register space up into logical pieces, and set of fixed register
>> > + locations/definitions within these regions, with some of these regions
>> > + specifically used for interrupt handling.
>> > +
>> > + The QPNP PMICs are used with the Qualcomm Snapdragon series SoCs, and are
>> > + interfaced to the chip via the SPMI (System Power Management Interface) bus.
>> > + Support for multiple independent functions are implemented by splitting the
>> > + 16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes
>> > + each. A function can consume one or more of these fixed-size register regions.
>> > +
>> > +properties:
>> > + compatible:
>> > + enum:
>> > + - qcom,pm8941
>> > + - qcom,pm8841
>> > + - qcom,pma8084
>> > + - qcom,pm8019
>> > + - qcom,pm8226
>> > + - qcom,pm8110
>> > + - qcom,pma8084
>> > + - qcom,pmi8962
>> > + - qcom,pmd9635
>> > + - qcom,pm8994
>> > + - qcom,pmi8994
>> > + - qcom,pm8916
>> > + - qcom,pm8004
>> > + - qcom,pm8909
>> > + - qcom,pm8950
>> > + - qcom,pmi8950
>> > + - qcom,pm8998
>> > + - qcom,pmi8998
>> > + - qcom,pm8005
>> > + - qcom,spmi-pmic
>>
>> I think we want qcom,spmi-pmic to be there always. To do that we need
>> it
>> to look like:
>>
>> compatible:
>> items:
>> enum:
>> - qcom,pm8941
>> ...
>> enum:
>> - qcom,spmi-pmic
>
> Yes, but missing '-' before the enum's.
>
Will add it in next post
>>
>> > +
>> > + reg:
>> > + maxItems: 1
>> > + description:
>> > + Specifies the SPMI USID slave address for this device.
>> > + For more information see Documentation/devicetree/bindings/spmi/spmi.txt
>> > +
>> > +patternProperties:
>> > + "^.*@[0-9a-f]+$":
>
> You are going to need to define the specific child nodes with the
> schemas for them, but a SPMI bus schema may be useful.
>
Ok.. I will add it in next post.
>> > + type: object
>> > + description:
>> > + Each child node of SPMI slave id represents a function of the PMIC. In the
>> > + example below the rtc device node represents a peripheral of pm8941
>> > + SID = 0. The regulator device node represents a peripheral of pm8941 SID = 1.
>> > +
>> > + properties:
>> > + compatible:
>> > + description:
>> > + Compatible of the PMIC device.
>> > +
>> > + interrupts:
>> > + maxItems: 2
>> > + description:
>> > + Interrupts are specified as a 4-tuple. For more information
>> > + see Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
>>
>> Just make this bindings/spmi/qcom,spmi-pmic-arb.txt so that we don't
>> have to worry about it. Why is max items 2? Isn't it 4? Is this
>> property
>> supposed to be specified at all?
>>
>> > +
>> > + interrupt-names:
>> > + description:
>> > + Corresponding interrupt name to the interrupts property
>>
>> Does this need to be specified either?
>>
>> > +
>> > + required:
>> > + - compatible
>> > +
>> > +required:
>> > + - compatible
>> > + - reg
>> > +
>> > +examples:
>> > + - |
>> > + spmi {
>> > + compatible = "qcom,spmi-pmic-arb";
>> > + #address-cells = <2>;
>> > + #size-cells = <0>;
>> > +
>> > + pm8941@0 {
>>
>> pmic@0
>>
>> > + compatible = "qcom,pm8941";
>> > + reg = <0x0 0x0>;
>>
>> Why not include the header file to get the SPMI_USID macro?
>>
>> > +
>> > + rtc {
>> > + compatible = "qcom,rtc";
>> > + interrupts = <0x0 0x61 0x1 0x1>;
>> > + interrupt-names = "alarm";
>> > + };
>> > + };
>> > +
>> > + pm8941@1 {
>>
>> pmic@1
>>
>> > + compatible = "qcom,pm8941";
>> > + reg = <0x1 0x0>;
>> > +
>> > + regulator {
>> > + compatible = "qcom,regulator";
>> > + regulator-name = "8941_boost";
>> > + };
>> > + };
>> > + };
>> > +...
>> > --
>> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
>> > a Linux Foundation Collaborative Project
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