linux-kernel - Re: [PATCH] regulator: tps6286x-regulator: Enable REGCACHE

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Message-ID: <ZjBS23rdJEUTopDt@finisterre.sirena.org.uk>
Date: Tue, 30 Apr 2024 11:09:31 +0900
From: Mark Brown <broonie@...nel.org>
To: Jisheng Zhang <jszhang@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: tps6286x-regulator: Enable REGCACHE_FLAT

On Tue, Apr 30, 2024 at 09:00:19AM +0800, Jisheng Zhang wrote:

> Enable regmap cache to reduce i2c transactions and corresponding
> interrupts if regulator is accessed frequently. Since the register map
> is small, we use a FLAT regmap cache.

There are a number of disadvantages to the flat cache, especially the
lack of sparseness, so it is generally better to use the maple cache
unless there's a specific need for the flat cache (usually the fact that
it doesn't allocate).

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