linux-kernel - Re: [PATCH v2 3/5] input: himax_hx83112b: implement MCU register reading

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Message-ID: <44570cd2-9540-47f8-a409-26220b0812fb@sirena.org.uk>
Date: Tue, 14 May 2024 10:46:29 +0100
From: Mark Brown <broonie@...nel.org>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Felix Kaechele <felix@...chele.ca>, Job Noorman <job@...rman.info>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-input@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/5] input: himax_hx83112b: implement MCU register
 reading

On Mon, May 13, 2024 at 04:01:59PM -0700, Dmitry Torokhov wrote:
> On Sat, May 11, 2024 at 08:12:24AM -0400, Felix Kaechele wrote:
> > Implement reading from the MCU in a more universal fashion. This allows
> > properly handling reads of more than 4 bytes using the AHB FIFO
> > implemented in the chip.

> Mark, do we have anything in regmap to support this better or having a
> wrapper is the best solution here?

No, I've not seen something that explicitly requires toggling a burst
mode on and off to do a bulk operation.  Off the top of my head I'd
suggest just always leaving the burst mode enabled but I assume there's
some downside to doing that.  We could add something but I'm not sure if
it's worth it without having seen any other devices with the same need.

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