linux-kernel - Re: [PATCH v2 1/3] i3c: master: Add inline i3c_readl_fifo() and i3c_writel

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Message-ID: <aFmwyJ4W30PM_sCM@shikoro>
Date: Mon, 23 Jun 2025 21:53:44 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: Jorge Marques <jorge.marques@...log.com>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Frank Li <Frank.Li@....com>,
	Przemysław Gaj <pgaj@...ence.com>,
	linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] i3c: master: Add inline i3c_readl_fifo() and
 i3c_writel_fifo()

On Sun, Jun 22, 2025 at 11:18:58AM +0200, Jorge Marques wrote:
> The i3c abstraction excepts u8 buffers, but some controllers have a bus
> width of 32-bits and don't support flagging valid bytes, so it is
> required to read/write long words and to use memcpy on the remainder of
> the number of bytes by 32-bits to not write/read outside the buffer
> bounds.
> 
> Signed-off-by: Jorge Marques <jorge.marques@...log.com>

Despite Frank's valid comments, I tested this code with the Renesas
driver and it worked so far. Thanks!

Tested-by: Wolfram Sang <wsa+renesas@...g-engineering.com>


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