linux-kernel - Re: [PATCH] arm64: dts: freescale: imx93-phyboard-nash: Add current sense amplifier

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Message-ID: <aKVDBnMro4kg59Kq@dragon>
Date: Wed, 20 Aug 2025 11:37:42 +0800
From: Shawn Guo <shawnguo2@...h.net>
To: Primoz Fiser <primoz.fiser@...ik.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, upstream@...ts.phytec.de
Subject: Re: [PATCH] arm64: dts: freescale: imx93-phyboard-nash: Add current
 sense amplifier

On Mon, Jul 14, 2025 at 12:36:24PM +0200, Primoz Fiser wrote:
> There is a current sensing circuitry on the phyBOARD-Nash-i.MX93 capable
> of measuring input current consumption of the phyCORE-i.MX93 SoM @ 3.3V.
> Circuity consists of MAX4372 current-sense amplifier (50V/V) with two 70
> mOhm shunts resistors in parallel configuration (effective R = 35 mOhm)
> connected to the SoC internal 12-bit ADC channel #1 (Vref = 1.8V) via
> voltage divider with ratio of 1/2. This results in a current scaling
> factor of 0.502232142 mA/LSB.
> 
> Signed-off-by: Primoz Fiser <primoz.fiser@...ik.com>

Applied, thanks!