Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <88a6856e-c766-d4a5-1882-5350fd0e248a@linaro.org>
Date:   Wed, 22 Mar 2023 08:34:32 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.9.0
Subject: Re: [PATCH v3 1/4] dt-bindings: mfd: Add TI TPS6594 PMIC
Content-Language: en-US
To:     Julien Panis <jpanis@baylibre.com>, lee@kernel.org,
        robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
        corbet@lwn.net, arnd@arndb.de, gregkh@linuxfoundation.org,
        derek.kiernan@xilinx.com, dragan.cvetic@xilinx.com
Cc:     eric.auger@redhat.com, jgg@ziepe.ca, razor@blackwall.org,
        stephen@networkplumber.org, davem@davemloft.net,
        christian.koenig@amd.com, contact@emersion.fr,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-doc@vger.kernel.org, sterzik@ti.com, u-kumar1@ti.com,
        eblanc@baylibre.com, jneanne@baylibre.com
References: <20230321171020.74736-1-jpanis@baylibre.com>
 <20230321171020.74736-2-jpanis@baylibre.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20230321171020.74736-2-jpanis@baylibre.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

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@baylibre.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@baylibre.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.

> +      - 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.

Best regards,
Krzysztof