From nobody Sun Feb 8 05:20:04 2026 Received: from cp2.siel.si (cp2.siel.si [46.19.12.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A8B6830BB9D; Thu, 23 Oct 2025 10:34:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.19.12.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761215678; cv=none; b=tK8DNhHQOsX9RoEGlOpoZKmOGtrWhEUfRKUDcqbU9/RuFhMXXRjnBW+10DBpgaXrrPnw02jkwf7uJ+K6d8R58zYW09FgUnF3W2cz+pWFxnPiUAUp0UCAGwzc1pBcCkKkxwI/vBXvb0dxkKWU/AvIzI3paWV7t7FC63QIsrQKyFk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761215678; c=relaxed/simple; bh=Y5gZ6y04Xfgv8k6L6tGBT5KEu8DOqE2OSkRStOZ898Y=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=BAA3+VPwQ31T3phHXgC9TDxXB1CfvW9NLJQ9II439heBCNuA3UonafpGq5y3UIM5p1nVHABXKth4Y6BUGLPEQDGjGjGccEBa+zF03Ntxog+aw58DiEuIHmIQ227UDL/cQK6IctEkZC9iBHWeENQ4U2O4G0yFpoavaQTmns0NuZI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=norik.com; spf=pass smtp.mailfrom=norik.com; dkim=pass (2048-bit key) header.d=norik.com header.i=@norik.com header.b=Pwxz1Y/+; arc=none smtp.client-ip=46.19.12.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=norik.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=norik.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=norik.com header.i=@norik.com header.b="Pwxz1Y/+" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=norik.com; s=default; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject: Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=KaIqVjC080ehs+M4YMocjMvAP2vggOM8cTfTrGcUD3Q=; b=Pwxz1Y/+dhLSy+qAY3X3bmHxPN QiGy/MseMEXz9E5ficRSjb/d/H8V7O1eShNSVWlbru+ZRf5xZKjvFRSLGz2AAlZKjQESOoRRSqWvq ujokKs9FhOG3GOj2ChcReOxgpBzMzoYrgnKvD8nBxDUT8fmDb2mmzdZBgmafxuII4wV/hjxlI/bD0 +HOnUgv/cAeqgPVXfPrR2uCdMjqnrw9U4qQC8MeajGTvIPAwDv3gXk3pKlDhi8hpwiWP+Z3aAtcP6 yracWIgsq4nVba7PAGhItOI+7vGXYw1wEhGq3mDBnYSyIjIY8ZnGdxV/OMnwLcfbT0Fso2OeOarCc kGpwiYuw==; Received: from 89-212-21-243.static.t-2.net ([89.212.21.243]:50686 helo=localhost.localdomain) by cp2.siel.si with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vBseN-00000005s0B-0vOg; Thu, 23 Oct 2025 12:34:27 +0200 From: Primoz Fiser To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, upstream@lists.phytec.de Subject: [PATCH] arm64: dts: freescale: imx93-phy{core,board}: Add i2c bus recovery Date: Thu, 23 Oct 2025 12:34:26 +0200 Message-Id: <20251023103426.3606647-1-primoz.fiser@norik.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cp2.siel.si X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - norik.com X-Get-Message-Sender-Via: cp2.siel.si: authenticated_id: primoz.fiser@norik.com X-Authenticated-Sender: cp2.siel.si: primoz.fiser@norik.com X-Source: X-Source-Args: X-Source-Dir: Content-Type: text/plain; charset="utf-8" Add bus recovery feature for I2C buses on the PHYTEC phyCORE-i.MX93 SoM based boards (that is phyBOARD-Nash-i.MX93 and phyBOARD-Segin-i.MX93). This enables the i2c-imx-lpi2c driver to recover the stuck I2C bus by switching the SCL and SDA pinmuxing and do the I2C bus bit-banging. Signed-off-by: Primoz Fiser --- .../arm64/boot/dts/freescale/imx93-phyboard-nash.dts | 12 +++++++++++- .../boot/dts/freescale/imx93-phyboard-segin.dts | 12 +++++++++++- arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi | 12 +++++++++++- 3 files changed, 33 insertions(+), 3 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts b/arch/a= rm64/boot/dts/freescale/imx93-phyboard-nash.dts index 5599e296919f..96c58cf13754 100644 --- a/arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts +++ b/arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts @@ -128,8 +128,11 @@ &flexcan1 { /* I2C2 */ &lpi2c2 { clock-frequency =3D <400000>; - pinctrl-names =3D "default"; + pinctrl-names =3D "default", "gpio"; pinctrl-0 =3D <&pinctrl_lpi2c2>; + pinctrl-1 =3D <&pinctrl_lpi2c2_gpio>; + scl-gpios =3D <&gpio1 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + sda-gpios =3D <&gpio1 3 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; status =3D "okay"; =20 /* RTC */ @@ -253,6 +256,13 @@ MX93_PAD_I2C2_SDA__LPI2C2_SDA 0x40000b9e >; }; =20 + pinctrl_lpi2c2_gpio: lpi2c2gpiogrp { + fsl,pins =3D < + MX93_PAD_I2C2_SCL__GPIO1_IO02 0x31e + MX93_PAD_I2C2_SDA__GPIO1_IO03 0x31e + >; + }; + pinctrl_lpspi6: lpspi6grp { fsl,pins =3D < MX93_PAD_GPIO_IO00__GPIO2_IO00 0x386 diff --git a/arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts b/arch/= arm64/boot/dts/freescale/imx93-phyboard-segin.dts index 802d96b19e4c..1850a93dbaa4 100644 --- a/arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts +++ b/arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts @@ -132,8 +132,11 @@ &flexcan1 { /* I2C2 */ &lpi2c2 { clock-frequency =3D <400000>; - pinctrl-names =3D "default"; + pinctrl-names =3D "default", "gpio"; pinctrl-0 =3D <&pinctrl_lpi2c2>; + pinctrl-1 =3D <&pinctrl_lpi2c2_gpio>; + scl-gpios =3D <&gpio1 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + sda-gpios =3D <&gpio1 3 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; status =3D "okay"; =20 /* Codec */ @@ -238,6 +241,13 @@ MX93_PAD_I2C2_SDA__LPI2C2_SDA 0x40000b9e >; }; =20 + pinctrl_lpi2c2_gpio: lpi2c2gpiogrp { + fsl,pins =3D < + MX93_PAD_I2C2_SCL__GPIO1_IO02 0x31e + MX93_PAD_I2C2_SDA__GPIO1_IO03 0x31e + >; + }; + pinctrl_reg_usdhc2_vmmc: regusdhc2vmmcgrp { fsl,pins =3D < MX93_PAD_SD2_RESET_B__GPIO3_IO07 0x31e diff --git a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi b/arch/ar= m64/boot/dts/freescale/imx93-phycore-som.dtsi index 3f069905cf0b..ebc57841f27f 100644 --- a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi @@ -93,8 +93,11 @@ ethphy1: ethernet-phy@1 { /* I2C3 */ &lpi2c3 { clock-frequency =3D <400000>; - pinctrl-names =3D "default"; + pinctrl-names =3D "default", "gpio"; pinctrl-0 =3D <&pinctrl_lpi2c3>; + pinctrl-1 =3D <&pinctrl_lpi2c3_gpio>; + scl-gpios =3D <&gpio2 29 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + sda-gpios =3D <&gpio2 28 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; status =3D "okay"; =20 pmic@25 { @@ -234,6 +237,13 @@ MX93_PAD_GPIO_IO29__LPI2C3_SCL 0x40000b9e >; }; =20 + pinctrl_lpi2c3_gpio: lpi2c3gpiogrp { + fsl,pins =3D < + MX93_PAD_GPIO_IO28__GPIO2_IO28 0x31e + MX93_PAD_GPIO_IO29__GPIO2_IO29 0x31e + >; + }; + pinctrl_pmic: pmicgrp { fsl,pins =3D < MX93_PAD_ENET2_RD3__GPIO4_IO27 0x31e --=20 2.34.1