linux-kernel - Re: (subset) [PATCH v5 1/2] mfd: tps65219: Implement LOCK register handling for TPS65214

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Message-Id: <176795712434.1656708.9000200659822594124.b4-ty@kernel.org>
Date: Fri, 09 Jan 2026 11:12:04 +0000
From: Lee Jones <lee@...nel.org>
To: Aaro Koskinen <aaro.koskinen@....fi>, 
 Andreas Kemnade <andreas@...nade.info>, Kevin Hilman <khilman@...libre.com>, 
 Roger Quadros <rogerq@...nel.org>, Tony Lindgren <tony@...mide.com>, 
 Lee Jones <lee@...nel.org>, Shree Ramamoorthy <s-ramamoorthy@...com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 "Kory Maincent (TI.com)" <kory.maincent@...tlin.com>
Cc: Andrew Davis <afd@...com>, Bajjuri Praneeth <praneeth@...com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, linux-omap@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 stable@...r.kernel.org
Subject: Re: (subset) [PATCH v5 1/2] mfd: tps65219: Implement LOCK register
 handling for TPS65214

On Thu, 18 Dec 2025 16:06:28 +0100, Kory Maincent (TI.com) wrote:
> The TPS65214 PMIC variant has a LOCK_REG register that prevents writes to
> nearly all registers when locked. Unlock the registers at probe time and
> leave them unlocked permanently.
> 
> This approach is justified because:
> - Register locking is very uncommon in typical system operation
> - No code path is expected to lock the registers during runtime
> - Adding a custom regmap write function would add overhead to every
>   register write, including voltage changes triggered by CPU OPP
>   transitions from the cpufreq governor which could happen quite
>   frequently
> 
> [...]

Applied, thanks!

[1/2] mfd: tps65219: Implement LOCK register handling for TPS65214
      commit: 9ef5418bc106177f2330f7bf383f8a2cf29aa435

--
Lee Jones [李琼斯]