linux-kernel - [PATCH v2 0/1] arm64: dts: renesas: r9a09g047e57-smarc: Enable I3C

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Message-ID: <cover.1763638659.git.tommaso.merciai.xr@bp.renesas.com>
Date: Thu, 20 Nov 2025 12:51:38 +0100
From: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com,
	wsa+renesas@...g-engineering.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/1] arm64: dts: renesas: r9a09g047e57-smarc: Enable I3C

Dear all,

This patch enable I3C support to the rzg3e-smarc-som.dtsi.
Tested using NXP P3T1085UK-ARD connected to the RZ/G3E SMARC SoM
via the RZ/G3E SMARC BREAKOUT board.

Using the following connections:

 RZ SMARC Carrier II (CN1)  →  RZ SMARC BREAKOUT board
 +--------------------------------------------------------+

 RZ SMARC Carrier II (PMOD1_6)  →  P3T1085UK-ARD (J9)
 +--------------------------------------------------------+
 |    PWR_PMOD1  (pin 6)    →    (pin 9)   +3V3           |
 |    GND        (pin 5)    →    (pin 7)   GND            |
 +--------------------------------------------------------+

 RZ SMARC BREAKOUT board (CN1)  →  P3T1085UK-ARD (J13)
 +--------------------------------------------------------+
 |    GND      (pin 2)    →    (pin 4)   GND              |
 |    I3C_SCL  (pin 3)    →    (pin 1)   SCL_I3C          |
 |    I3C_SDA  (pin 4)    →    (pin 2)   SDA_I3C          |
 +--------------------------------------------------------+

 The following jumpers setup is required on the P3T1085UK-ARD board:
 - JP1: 1-2
 - JP2: 1-2
 - JP3: 1-2

 The following SW1(1,2) switch setup is required on the RZ SMARC BREAKOUT
 board:
 - SW1(1): 1
 - SW1(2): 1

Thanks & Regards,
Tommaso

v1->v2:
 - Dropped overlay and moved I3C support (pure bus mode) directly to the
   rzg3e-smarc-som.dtsi as suggested by Wolfram Sang.
 - Removed alias as suggested by Wolfram Sang.

Tommaso Merciai (1):
  arm64: dts: renesas: rzg3e-smarc-som: Enable I3C support

 arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

-- 
2.43.0