linux-kernel - Re: [PATCH v4 05/12] regulator: dt-bindings: mt6358: Add MT6366 PMIC

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Date:   Mon, 2 Oct 2023 11:18:03 -0500
From:   Rob Herring <robh@...nel.org>
To:     Chen-Yu Tsai <wenst@...omium.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Zhiyong Tao <zhiyong.tao@...iatek.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, Lee Jones <lee@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Subject: Re: [PATCH v4 05/12] regulator: dt-bindings: mt6358: Add MT6366 PMIC


On Thu, 28 Sep 2023 16:55:28 +0800, Chen-Yu Tsai wrote:
> From: Zhiyong Tao <zhiyong.tao@...iatek.com>
> 
> The MediaTek MT6366 PMIC is similar to the MT6358 PMIC. It is designed
> to be paired with the MediaTek MT8186 SoC. It has 9 buck regulators and
> 29 LDO regulators, not counting ones that feed internally and basically
> have no controls. The regulators are named after their intended usage
> for the SoC and system design, thus not named generically as ldoX or
> dcdcX, but as vcn33 or vgpu.
> 
> The differences compared to the MT6358 are minimal:
> - Regulators removed: VCAMA1, VCAMA2, VCAMD, VCAMIO, VLDO28
> - Regulators added: VM18, VMDDR, VSRAM_CORE
> 
> Both PMIC models contain a chip ID register at the same address that
> can be used to differentiate the actual model. Thus, even though the
> MT6366 is not fully backward compatible with the MT6358, it still falls
> back on the MT6358 compatible string. It is up to the implementation
> to use the chip ID register as a probing mechanism.
> 
> Update the MT6358 regulator binding and add entries for all the MT6366's
> regulators and their supplies. The regulator node names follow a cleaned
> up style without type prefixes and with underscores replaced with hyphens.
> 
> Signed-off-by: Zhiyong Tao <zhiyong.tao@...iatek.com>
> [wens@...omium.org: major rework and added commit message]
> Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
> ---
> Changes since v3:
> - Expanded commit message to mention why a fallback compatible is used
> - Adapted to ldo_vxo22 and ldo_vusb movement to properties in previous
>   patch
> - Split example into two, one for each variant
> - Renamed regulator node in examples to just "regulator"
> 
> Changes since v2:
> - Merged all the propertyPatterns together; the if-then sections now
>   only block out invalid properties
> 
> Changes since v1:
> - Replaced underscores in supply names to hyphens
> - Merged with MT6358 regulator binding
> - Added MT6358 fallback compatible to MT6366 regulator
> 
> Changes since Zhiyong's last version (v4) [1]:
> - simplified regulator names
> - added descriptions to regulators
> - removed bogus regulators (*_sshub)
> - merged vcn33-wifi and vcn33-bt as vcn33
> - added missing regulators (vm18, vmddr, vsram-core)
> - cut down examples to a handful of cases and made them complete
> - expanded commit message a lot
> 
> [1] https://lore.kernel.org/linux-arm-kernel/20220823123745.14061-1-zhiyong.tao@mediatek.com/
> 
>  .../regulator/mediatek,mt6358-regulator.yaml  | 149 ++++++++++++++----
>  1 file changed, 120 insertions(+), 29 deletions(-)
> 

Reviewed-by: Rob Herring <robh@...nel.org>