linux-kernel - Re: [PATCH] spi: axi-spi-engine: don't emit XFER

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Message-ID: <05203de8fde109255b6e99a08e57037525a629ea.camel@gmail.com>
Date: Wed, 24 Jul 2024 09:45:59 +0200
From: Nuno Sá <noname.nuno@...il.com>
To: David Lechner <dlechner@...libre.com>, Mark Brown <broonie@...nel.org>
Cc: Michael Hennerich <michael.hennerich@...log.com>, Nuno
 Sá <nuno.sa@...log.com>, linux-spi@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi: axi-spi-engine: don't emit XFER_BITS for empty xfer

On Tue, 2024-07-23 at 13:36 -0500, David Lechner wrote:
> This adds a check on xfer->len to avoid emitting an XFER_BITS
> instruction for empty transfers in the AXI SPI Engine driver. This
> avoids unnecessary delays caused by executing an instruction that has
> no effect on the actual SPI transfer.
> 
> Signed-off-by: David Lechner <dlechner@...libre.com>
> ---

Reviewed-by: Nuno Sa <nuno.sa@...log.com>