linux-kernel - Re: [PATCH v5 2/2] power: supply: max17042: add platform driver variant

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Message-ID: <fa68df6a-f8dc-4701-8e02-fc90e3561544@kernel.org>
Date: Tue, 24 Dec 2024 15:16:44 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Dzmitry Sankouski <dsankouski@...il.com>,
 Hans de Goede <hdegoede@...hat.com>,
 Marek Szyprowski <m.szyprowski@...sung.com>,
 Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>,
 Purism Kernel Team <kernel@...i.sm>, Sebastian Reichel <sre@...nel.org>,
 Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
 Alim Akhtar <alim.akhtar@...sung.com>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-samsung-soc@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v5 2/2] power: supply: max17042: add platform driver
 variant

On 23/12/2024 14:30, Dzmitry Sankouski wrote:
> Maxim PMICs may include fuel gauge with additional features, which is
> out of single Linux power supply driver scope.
> 
> For example, in max77705 PMIC fuelgauge has additional registers,
> like IIN_REG, VSYS_REG, ISYS_REG. Those needed to measure PMIC input
> current, system voltage and current respectively. Those measurements
> cannot be bound to any of fuelgauge properties.
> 
> The solution here add and option to use max17042 driver as a MFD
> sub device, thus allowing any additional functionality be implemented as
> another sub device. This will help to reduce code duplication in MFD
> fuel gauge drivers.
> 


I did not perform a thorough review, but skimmed through the code. Looks
fine.


Acked-by: Krzysztof Kozlowski <krzk@...nel.org>

Best regards,
Krzysztof