linux-kernel - Re: [PATCH v11 1/8] dt-bindings: power: supply: Add MediaTek MT6370 Charger

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Message-ID: <20220916141843.pmlg3x7yrnkdr26r@mercury.elektranox.org>
Date:   Fri, 16 Sep 2022 16:18:43 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     ChiaEn Wu <peterwu.pub@...il.com>
Cc:     pavel@....cz, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, matthias.bgg@...il.com,
        jic23@...nel.org, lars@...afoo.de, broonie@...nel.org,
        mazziesaccount@...il.com, andriy.shevchenko@...ux.intel.com,
        chiaen_wu@...htek.com, alice_chen@...htek.com,
        cy_huang@...htek.com, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-iio@...r.kernel.org,
        szunichen@...il.com,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v11 1/8] dt-bindings: power: supply: Add MediaTek MT6370
 Charger

Hi,

On Thu, Sep 15, 2022 at 05:47:29PM +0800, ChiaEn Wu wrote:
> From: ChiaEn Wu <chiaen_wu@...htek.com>
> 
> Add MediaTek MT6370 Charger binding documentation.
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: ChiaEn Wu <chiaen_wu@...htek.com>
> ---
> v11
> - Add more detailed description of irqs.
> - Adujust the order of irqs
> ---

Acked-by: Sebastian Reichel <sebastian.reichel@...labora.com>

-- Sebastian

>  .../power/supply/mediatek,mt6370-charger.yaml      | 96 ++++++++++++++++++++++
>  1 file changed, 96 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml b/Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
> new file mode 100644
> index 0000000..fd491c5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
> @@ -0,0 +1,96 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/supply/mediatek,mt6370-charger.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek MT6370 Battery Charger
> +
> +maintainers:
> +  - ChiaEn Wu <chiaen_wu@...htek.com>
> +
> +description: |
> +  This module is part of the MT6370 MFD device.
> +  Provides Battery Charger, Boost for OTG devices and BC1.2 detection.
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt6370-charger
> +
> +  interrupts:
> +    description: |
> +      Specify what irqs are needed to be handled by MT6370 Charger driver.
> +      We need to use the IRQ "MT6370_IRQ_OVPCTRL_UVP_D" to know when USB
> +      is plugged in, and then the driver will enable BC1.2 detection.
> +      After the hardware of MT6370 completes the BC1.2 detection,
> +      IRQ "MT6370_IRQ_ATTACH" will be triggered, and the driver will know
> +      the result of BC1.2 detection.
> +      When the IRQ "MT6370_IRQ_CHG_MIVR" is triggered, it means that the
> +      hardware enters the "Minimum Input Voltage Regulation loop" and
> +      a workaround needs to be applied at this time.
> +      In summary, "MT6370_IRQ_OVPCTRL_UVP_D", "MT6370_IRQ_ATTACH" and
> +      "MT6370_IRQ_CHG_MIVR" are required in this charger driver.
> +    items:
> +      - description: irq of "USB is plugged in"
> +      - description: irq of "BC1.2 is done"
> +      - description: irq of "Minimum Input Voltage Regulation loop is active"
> +
> +  interrupt-names:
> +    items:
> +      - const: uvp_d_evt
> +      - const: attach_i
> +      - const: mivr
> +
> +  io-channels:
> +    description: |
> +      Use ADC channel to read VBUS, IBUS, IBAT, etc., info.
> +    minItems: 1
> +    items:
> +      - description: |
> +          VBUS voltage with lower accuracy (+-75mV) but higher measure
> +          range (1~22V)
> +      - description: |
> +          VBUS voltage with higher accuracy (+-30mV) but lower measure
> +          range (1~9.76V)
> +      - description: the main system input voltage
> +      - description: battery voltage
> +      - description: battery temperature-sense input voltage
> +      - description: IBUS current (required)
> +      - description: battery current
> +      - description: |
> +          regulated output voltage to supply for the PWM low-side gate driver
> +          and the bootstrap capacitor
> +      - description: IC junction temperature
> +
> +  io-channel-names:
> +    minItems: 1
> +    items:
> +      - const: vbusdiv5
> +      - const: vbusdiv2
> +      - const: vsys
> +      - const: vbat
> +      - const: ts_bat
> +      - const: ibus
> +      - const: ibat
> +      - const: chg_vddp
> +      - const: temp_jc
> +
> +  usb-otg-vbus-regulator:
> +    type: object
> +    description: OTG boost regulator.
> +    unevaluatedProperties: false
> +    $ref: /schemas/regulator/regulator.yaml#
> +
> +    properties:
> +      enable-gpios:
> +        maxItems: 1
> +
> +required:
> +  - compatible
> +  - interrupts
> +  - interrupt-names
> +  - io-channels
> +
> +additionalProperties: false
> +
> +...
> -- 
> 2.7.4
> 

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