linux-kernel - Re: [PATCH 1/7] dt-bindings: soc: qcom: Add qcom-pbs bindings

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Date:   Thu, 29 Jun 2023 14:53:42 -0700
From:   Anjelique Melendez <quic_amelende@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Herring <robh@...nel.org>
CC:     <pavel@....cz>, <lee@...nel.org>, <thierry.reding@...il.com>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <u.kleine-koenig@...gutronix.de>,
        <linux-leds@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-pwm@...r.kernel.org>
Subject: Re: [PATCH 1/7] dt-bindings: soc: qcom: Add qcom-pbs bindings



On 6/29/2023 1:45 AM, Dmitry Baryshkov wrote:
> On 29/06/2023 04:19, Anjelique Melendez wrote:
>>
>>
>> On 6/26/2023 6:58 AM, Rob Herring wrote:
>>> On Wed, Jun 21, 2023 at 11:59:45AM -0700, Anjelique Melendez wrote:
>>>> Add binding for the Qualcomm Programmable Boot Sequencer device.
>>>>
>>>> Signed-off-by: Anjelique Melendez <quic_amelende@...cinc.com>
>>>> ---
>>>>   .../bindings/soc/qcom/qcom-pbs.yaml           | 41 +++++++++++++++++++
>>>>   1 file changed, 41 insertions(+)
>>>>   create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom-pbs.yaml
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom-pbs.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom-pbs.yaml
>>>> new file mode 100644
>>>> index 000000000000..0a89c334f95c
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/soc/qcom/qcom-pbs.yaml
>>>> @@ -0,0 +1,41 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/soc/qcom/qcom-pbs.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Qualcomm Technologies, Inc. PBS
>>>> +
>>>> +maintainers:
>>>> +  - Anjelique Melendez <quic_amelende@...cinc.com>
>>>> +
>>>> +description: |
>>>> +  Qualcomm PBS (programmable boot sequencer) supports triggering sequences
>>>> +  for clients upon request.
>>>> +
>>>> +properties:
>>>> +  compatible:
>>>> +    const: qcom,pbs
>>>> +
>>>> +  reg:
>>>> +    description: |
>>>> +      Base address of the PBS peripheral.
>>>> +    maxItems: 1
>>>> +
>>>> +required:
>>>> + - compatible
>>>> + - reg
>>>> +
>>>> +additionalProperties: false
>>>> +
>>>> +examples:
>>>> +  - |
>>>> +    pmic {
>>>> +      #address-cells = <1>;
>>>> +      #size-cells = <0>;
>>>> +
>>>> +      qcom,pbs@...0 {
>>>> +        compatible = "qcom,pbs";
>>>> +        reg = <0x7400>;
>>>> +      };
>>>
>>> Why do you need a child node for this? Is there more than 1 instance in
>>> a PMIC? Every sub-function of a PMIC doesn't have to have a DT node.
>>>
>>
>> We currently have another downstream driver (which is planned to get upstreamed)
>> which also needs a handle to a pbs device in order to properly trigger events.
> 
> Does it have to be a separate driver? Or is it a part of the LPG driver, just being artificially split away?

Sure, I just discussed with team and we are ok with removing this as a separate driver. Will have that 
for next version. 
> 
>>
>>> Rob
>>
>>
>>
>