linux-hardening - [PATCH 0/2] i3c: add support for the Renesas controller

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Message-ID: <20250714091211.20497-1-wsa+renesas@sang-engineering.com>
Date: Mon, 14 Jul 2025 11:12:07 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-renesas-soc@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	Frank Li <Frank.Li@....com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Kees Cook <kees@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-hardening@...r.kernel.org,
	linux-i3c@...ts.infradead.org,
	Magnus Damm <magnus.damm@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
Subject: [PATCH 0/2] i3c: add support for the Renesas controller

Here is a basic driver for the I3C IP found in various Renesas SoCs like
RZ/G3S and G3E. Missing features to be added incrementally are IBI,
HotJoin and maybe target support. Other than that, this driver has been
tested with I3C pure busses (2 targets) and mixed busses (2 I3C +
various I2C targets). DAA and reading/writing to the temperature sensors
worked reliably at different speeds. Scoping the bus, the output from
the protocol analyzer seems reasonable, too. It was created by merging
two versions of it from two different BSPs. Then, improved according to
code analyzers, cleaned up with regard to coding style, and then
refactored to hopefully match I3C subsystem standards.

Changes since RFC are described in the individual patches. A branch with
enablement patches for RZ/G3S+G3E can be found here:

git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/g3s/i3c

Looking forward to comments,

   Wolfram

Tommaso Merciai (1):
  dt-bindings: i3c: renesas,i3c: Add binding for Renesas I3C controller

Wolfram Sang (1):
  i3c: add driver for Renesas I3C controller

 .../devicetree/bindings/i3c/renesas,i3c.yaml  |  180 +++
 MAINTAINERS                                   |    7 +
 drivers/i3c/master/Kconfig                    |   10 +
 drivers/i3c/master/Makefile                   |    1 +
 drivers/i3c/master/renesas-i3c.c              | 1433 +++++++++++++++++
 5 files changed, 1631 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i3c/renesas,i3c.yaml
 create mode 100644 drivers/i3c/master/renesas-i3c.c

-- 
2.47.2