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Message-ID: <c6b04576c27b2d5518760699d9d78967@codeaurora.org>
Date: Wed, 10 Feb 2021 18:59:24 +0530
From: kgunda@...eaurora.org
To: Rob Herring <robh@...nel.org>
Cc: swboyd@...omium.org, lee.jones@...aro.org, agross@...nel.org,
bjorn.andersson@...aro.org, devicetree@...r.kernel.org,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
mark.rutland@....com, linux-arm-msm-owner@...r.kernel.org,
Stephen Boyd <sboyd@...nel.org>
Subject: Re: [PATCH V5 1/2] mfd: qcom-spmi-pmic: Convert bindings to .yaml
format
On 2021-01-12 03:12, Rob Herring wrote:
> On Wed, Dec 30, 2020 at 05:26:22PM +0530, Kiran Gunda wrote:
>> Convert the bindings from .txt to .yaml format.
>>
>> Signed-off-by: Kiran Gunda <kgunda@...eaurora.org>
>> ---
>> .../devicetree/bindings/mfd/qcom,spmi-pmic.txt | 80
>> --------------
>> .../devicetree/bindings/mfd/qcom,spmi-pmic.yaml | 117
>> +++++++++++++++++++++
>> 2 files changed, 117 insertions(+), 80 deletions(-)
>> delete mode 100644
>> Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
>> create mode 100644
>> Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
>
>> 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..b753bdb
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
>> @@ -0,0 +1,117 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mfd/qcom,spmi-pmic.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm SPMI PMICs multi-function device bindings
>> +
>> +maintainers:
>> + - Stephen Boyd <sboyd@...nel.org>
>> + - Kiran Gunda <kgunda@...eaurora.org>
>> +
>> +description: |
>> + The Qualcomm SPMI PMICs use a QPNP scheme through SPMI interface.
>> + 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:
>> + spmi_bus:
>> + type: object
>> + description: SPMI bus node
>
> This is outside the scope of this binding.
>
>> +
>> +patternProperties:
>> + "^pmic@[0-9]$":
>> + description: Child PMIC nodes
>> + type: object
>
> You've defined spmi_bus and pmic@... as siblings. I assume you meant
> parent/child instead. You'd need to indent all this 4 more spaces.
>
> However, this is also outside the scope of the binding and should be
> removed.
>
>> +
>> + properties:
>> + compatible:
>
> So this needs to be at the top level. 'compatible' is also how we
> decide
> to apply a schema to a node. What you did here will never be applied.
> Introduce an error to the example and see.
>
>> + items:
>> + - enum:
>> + # Sorted based on subtype ID the device reports
>> + - qcom,pm8941
>> + - qcom,pm8841
>> + - qcom,pma8084
>> + - qcom,pm8019
>> + - qcom,pm8226
>> + - qcom,pm8110
>> + - qcom,pma8084
>> + - qcom,pmi8962
>> + - qcom,pmd9635
>> + - qcom,pm8994
>> + - qcom,pmi8994
>> + - qcom,pm8916
>> + - qcom,pm8004
>> + - qcom,pm8909
>> + - qcom,pm8950
>> + - qcom,pmi8950
>> + - qcom,pm8998
>> + - qcom,pmi8998
>> + - qcom,pm8005
>> + - qcom,pm660l
>> + - qcom,pm660
>> +
>> + - enum:
>> + - qcom,spmi-pmic
>
> You can use 'const' here instead of enum.
>
Okay. I can address the above comments.
>> +
>> + reg:
>> + maxItems: 1
>> + description:
>> + Specifies the SPMI USID slave address for this device.
>> + For more information see bindings/spmi/spmi.txt
>> +
>> + patternProperties:
>> + "^[a-zA-Z0-9]$":
>> + 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.
>> + type: object
>
> No, you need to define all the child nodes. This may mean you need to
> split to several schemas if each PMIC has different sub devices.
>
Currently all the different child node bindings have not been converted
to .yaml.
That means probably I can't convert this to .yaml unless all the child
schemas are available?
>> +
>> + required:
>> + - compatible
>> + - reg
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/spmi/spmi.h>
>> +
>> + spmi_bus {
>> + compatible = "qcom,spmi-pmic-arb";
>> + #address-cells = <2>;
>> + #size-cells = <0>;
>> +
>> + pmic@0 {
>> + compatible = "qcom,pm8941";
>> + reg = <0x0 SPMI_USID>;
>> +
>> + rtc {
>> + compatible = "qcom,rtc";
>
> Not documented nor used anywhere.
>
>> + interrupts = <0x0 0x61 0x1 0x1>;
>> + interrupt-names = "alarm";
>> + };
>> + };
>> +
>> + pmic@1 {
>> + compatible = "qcom,pm8941";
>> + reg = <0x1 SPMI_USID>;
>> +
>> + regulator {
>> + compatible = "qcom,regulator";
>
> Same here.
>
>> + 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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