linux-kernel - Re: [PATCH v2 2/2] counter: microchip-tcb-capture: Add capture extensions for registers RA-RC

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Message-ID: <Z6KsrhUYoYF8n10J@ishi>
Date: Wed, 5 Feb 2025 09:11:26 +0900
From: William Breathitt Gray <wbg@...nel.org>
To: Bence Csókás <csokas.bence@...lan.hu>
Cc: linux-arm-kernel@...ts.infradead.org, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Kamel Bouhara <kamel.bouhara@...tlin.com>
Subject: Re: [PATCH v2 2/2] counter: microchip-tcb-capture: Add capture
 extensions for registers RA-RC

On Mon, Feb 03, 2025 at 05:29:53PM +0100, Bence Csókás wrote:
> TCB hardware is capable of capturing the timer value to registers RA and
> RB. On top, it is capable of triggering on compare against a third
> register, RC. Add these registers as extensions.
> 
> Signed-off-by: Bence Csókás <csokas.bence@...lan.hu>

What is the difference between RA and RB (your code looks like they
represent two distinct event channels, so I want to confirm)? Is RC a
threshold value set by the user, or is it another captured timer value?
The capture extension represents Count value specifically, so I want to
make sure we're using the right extension for these components.

William Breathitt Gray

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