linux-kernel - Re: [PATCH v3 1/4] dt-bindings: mfd: Add TI TPS6594 PMIC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <bffba580-e737-8996-4812-3c76c880acc9@baylibre.com>
Date:   Wed, 22 Mar 2023 09:01:35 +0100
From:   Julien Panis <jpanis@...libre.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        lee@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, corbet@....net, arnd@...db.de,
        gregkh@...uxfoundation.org, derek.kiernan@...inx.com,
        dragan.cvetic@...inx.com
Cc:     eric.auger@...hat.com, jgg@...pe.ca, razor@...ckwall.org,
        stephen@...workplumber.org, davem@...emloft.net,
        christian.koenig@....com, contact@...rsion.fr,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, sterzik@...com, u-kumar1@...com,
        eblanc@...libre.com, jneanne@...libre.com
Subject: Re: [PATCH v3 1/4] dt-bindings: mfd: Add TI TPS6594 PMIC



On 3/22/23 08:34, Krzysztof Kozlowski wrote:
> On 21/03/2023 18:10, Julien Panis wrote:
>> TPS6594 is a Power Management IC which provides regulators and others
>> features like GPIOs, RTC, watchdog, ESMs (Error Signal Monitor), and
>> PFSM (Pre-configurable Finite State Machine) managing the state of the
>> device.
>> TPS6594 is the super-set device while TPS6593 and LP8764X are derivatives.
>>
>> Signed-off-by: Julien Panis <jpanis@...libre.com>
>> ---
>>   .../devicetree/bindings/mfd/ti,tps6594.yaml   | 231 ++++++++++++++++++
>>   1 file changed, 231 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
>> new file mode 100644
>> index 000000000000..4e4565a68e40
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
>> @@ -0,0 +1,231 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mfd/ti,tps6594.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: TI TPS6594 Power Management Integrated Circuit
>> +
>> +maintainers:
>> +  - Julien Panis <jpanis@...libre.com>
>> +
>> +description:
>> +  TPS6594 is a Power Management IC which provides regulators and others
>> +  features like GPIOs, RTC, watchdog, ESMs (Error Signal Monitor), and
>> +  PFSM (Pre-configurable Finite State Machine) managing the state of the device.
>> +  TPS6594 is the super-set device while TPS6593 and LP8764X are derivatives.
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - ti,lp8764x
> Does x stand for a wildcard? If so, then fix it. Compatibles should be
> specific.

OK, I will remove 'x' in next version.

>
>> +      - ti,tps6593
>> +      - ti,tps6594
>> +
>> +  reg:
>> +    description: I2C slave address or SPI chip select number.
>> +    maxItems: 1
>> +
>> +  ti,primary-pmic:
>> +    type: boolean
>> +    description: |
>> +      Identify the primary PMIC on SPMI bus.
>> +      A multi-PMIC synchronization scheme is implemented in the PMIC device
>> +      to synchronize the power state changes with other PMIC devices. This is
>> +      accomplished through a SPMI bus: the primary PMIC is the controller
>> +      device on the SPMI bus, and the secondary PMICs are the target devices
>> +      on the SPMI bus.
>> +
>> +  system-power-controller: true
>> +
>> +  gpio-controller: true
>> +
>> +  '#gpio-cells':
>> +    const: 2
>> +    description: |
>> +      The first cell is the pin number, the second cell is used to specify flags.
>> +      See ../gpio/gpio.txt for more information.
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  ti,multi-phase-id:
>> +    description: |
>> +      Describes buck multi-phase configuration, if any. For instance, XY id means
>> +      that outputs of buck converters X and Y are combined in multi-phase mode.
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> No improvements here. As Rob pointed out, this looks like coupled
> regulators.

I used 'oneOf' logic to handle mutual exclusion. But it seems that I did not
understand what you and Rob expected.
Does some generic property already exist for 'coupled regulators' ?

>
> Best regards,
> Krzysztof
>