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[86.162.200.138]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42cb7f49a7bsm21765703f8f.19.2025.11.23.03.23.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Nov 2025 03:23:29 -0800 (PST) From: Biju X-Google-Original-From: Biju To: Marc Kleine-Budde , Vincent Mailhol , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Magnus Damm Cc: Biju Das , Fabrizio Castro , linux-can@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar Mahadev Lad , Biju Das Subject: [PATCH v2 1/2] dt-bindings: can: renesas,rcar-canfd: Document renesas,fd-only property Date: Sun, 23 Nov 2025 11:23:20 +0000 Message-ID: <20251123112326.128448-2-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251123112326.128448-1-biju.das.jz@bp.renesas.com> References: <20251123112326.128448-1-biju.das.jz@bp.renesas.com> 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 Content-Type: text/plain; charset="utf-8" From: Biju Das The CANFD on RZ/{G2L,G3E} and R-Car Gen4 support 3 modes FD-Only mode, Classical CAN mode and CAN-FD mode. In FD-Only mode, communication in Classical CAN frame format is disabled. Document renesas,fd-only to handle this mode. As these SoCs support 3 modes, update the description of renesas,no-can-fd property and disallow it for R-Car Gen3. Signed-off-by: Biju Das --- v1->v2: * Added conditional check to disallow fd-only mode for R-Car Gen3. --- .../bindings/net/can/renesas,rcar-canfd.yaml | 24 ++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.y= aml b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml index f4ac21c68427..a52244f0b5d1 100644 --- a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml +++ b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml @@ -125,9 +125,17 @@ properties: renesas,no-can-fd: $ref: /schemas/types.yaml#/definitions/flag description: - The controller can operate in either CAN FD only mode (default) or - Classical CAN only mode. The mode is global to all channels. - Specify this property to put the controller in Classical CAN only mo= de. + The controller can operate in either CAN-FD mode (default) or FD-Only + mode (RZ/{G2L,G3E} and R-Car Gen4) or Classical CAN mode. Specify th= is + property to put the controller in Classical CAN mode. + + renesas,fd-only: + $ref: /schemas/types.yaml#/definitions/flag + description: + The CANFD on RZ/{G2L,G3E} and R-Car Gen4 SoCs support 3 modes FD-Only + mode, Classical CAN mode and CAN-FD mode (default). In FD-Only mode, + communication in Classical CAN frame format is disabled. Specify this + property to put the controller in FD-Only mode. =20 assigned-clocks: description: @@ -267,6 +275,16 @@ allOf: patternProperties: "^channel[6-7]$": false =20 + - if: + properties: + compatible: + contains: + enum: + - renesas,rcar-gen3-canfd + then: + properties: + renesas,fd-only: false + unevaluatedProperties: false =20 examples: --=20 2.43.0 From nobody Tue Dec 2 00:46:51 2025 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 571C421CC47 for ; Sun, 23 Nov 2025 11:23:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763897017; cv=none; b=JZBgfzSD3XfWBQsszLAJ9SY2QoqkojyQkpI5m4WCPv+vNkKOTapewssnafFz6RqtRMREh3Zgn3ULWGYoJN9uSZHS8IUlQjpCjoY51kGkMpkyA1vwejl0hYZ8XNmb6551FFVIH/CfEjff2eABbWyB090/7dP5UDme9Tb5QWceByc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763897017; c=relaxed/simple; bh=judJf37ugx+9XxEA6+cURHD2HCi2BGwiplPtaY8oOCU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CJkS0WKjkEND0nQIdUUQxg5m3V22Uo/Rffe3EAIUzE5WpTF4iljqPjK/M8Qcb/l9ka39SRL5YIlnwosVctEk/BVVkIYK/mKNZpTdcWypGzDcnWaP8t4M1LInCk5D7FySloh0hQH0BSE080QiFWVCgOgRrc8cLkcVhM98Gvhb9mk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=jY+YIp8/; arc=none smtp.client-ip=209.85.128.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jY+YIp8/" Received: by mail-wm1-f51.google.com with SMTP id 5b1f17b1804b1-477ba2c1ca2so34527285e9.2 for ; Sun, 23 Nov 2025 03:23:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1763897010; x=1764501810; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Emr/+4aLXcwA6DEHvcDwnUuj4foIIDMHEYBSGGBEokE=; b=jY+YIp8/cagtNgQnz0l8HNppUimTsVbREcRm6HFrbH11+wJy2+wbl6Zb4JQm8p7v2B SdEgXRljd1Mf5jq11TTM/FS+obi17ENWAM1MDkgEzT8w2DW6TUnV2AYC172Jrk0tw5i0 gQJRcEeZfJOVd7f4MLPjLcfHYqkbVSKd+N38bwpFRzg23WKub6EKkBhlA7tNQmQeF3TQ aqIgggQpvm8BfTyH+y8ystpvpAPokNGvr8BhNnyF4etAUwFodMU81t7C0BCsNCqIrXXd eNZzG8htzKdr9xQT3nZuSwc/3xm23B5I7iD+Rf6QvLWF8SA9XhJuhdHg6vlbIUEAsMTz k8sA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763897010; x=1764501810; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Emr/+4aLXcwA6DEHvcDwnUuj4foIIDMHEYBSGGBEokE=; b=bGcLYYk6EKe4GaLylnWbg2cqFJH1kAuqDR8D4YNq8x5JpHocaxyBNdlxrXj/+KH7Xm 1bEc13erWJGYZ+iSgVjvKvySrzHOpBIfQZFTWRmvuAFF3qAb7Y85t03FMstG2XdrULXe jcHTU1YMeNDFUemskYSTWfKDW7ehPwUhAxx6lxAUoRpH37oMm4jbUZ6bRH8gNkStfecj 1vQl7BylSX6MdaFCy/KUtnip2Jt0527GlVkInCUvLcyD3705iPHSUIRSctUGhkv8Oxc3 K6WuhKDeBPWHEADzMtkWmOaGzKCGIbtFrVNMzYypL2S+htC4vAuSgRbfkLyGNmZ8TeGY ea0Q== X-Forwarded-Encrypted: i=1; AJvYcCXS3AaslYJtUgDYa1vGFOHjaWbFGGMBDl5OAdEUhK5Yjpyj5XIJ+RjtyHgpQbdh18V0z1WcQy0MhTXPlbo=@vger.kernel.org X-Gm-Message-State: AOJu0YzPYIJecEy6vvk/N1z/TK/VH8MAK6bqEHMXtbdAFY1F9/ExA37l z4/IDPD2y5z80Wx/k7y7lfr5LSw/ZNb9SVvlQlqNqbTqyqmdKBi2kpuq X-Gm-Gg: ASbGncvRlYs4Sx96qOf9zZzLbWpBST7BvgK6z06UoAZi4zG0zPT96SoFWNRNSU+RSCC KALJATIaEpBp5lyh++jx4VH6BtQRBbvtKbbH7kYyIBOWgoGakRwKtEjWzX5k6cn7gBf3Oioixfw loJWfYfGIGCH+cQ9ZNtnxOL4VUcJKfBYkUjyg/sS2WYNU328YMy2ODws8YZA8xQ6C3w39vxx/uP nNrvj2iwNyZXGCRnwAH8XuiRayX1/HhbMC1kE2ffREI+T2S9sfIU7LZBcFbwAeX1KmmEsWpngaj ilBbPW8Oh7BdQnxDxIyOpLVtfjy45dC/YpWtTpn1+HmOvhY1prHMfjPTRtFsCi7qYAD9CHZVjru uwAh61BBGaxHreoBJpXf7PqOeQYARFDAJsGZCco21jWgo2EmxF5AkSHA+NazB+EMZR3YkYTMrmr FLvn3vS1yK/fiFgvia1Ceh+JEc25MZ6VgYa8IoOqMrVDq0sOLtJ8huDku7Fo5M+NaD4ZP4SEQ= X-Google-Smtp-Source: AGHT+IGTTftybiQ2Gt6OA2V2ockpQieSM4HqvkIUoh8tdMLZ7vPfFmd2LOncO8JPMOWOsk/IZByI7w== X-Received: by 2002:a05:600c:4f48:b0:46e:761b:e7ff with SMTP id 5b1f17b1804b1-477c01e02e5mr76829755e9.28.1763897010101; Sun, 23 Nov 2025 03:23:30 -0800 (PST) Received: from biju.lan (host86-162-200-138.range86-162.btcentralplus.com. [86.162.200.138]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42cb7f49a7bsm21765703f8f.19.2025.11.23.03.23.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Nov 2025 03:23:29 -0800 (PST) From: Biju X-Google-Original-From: Biju To: Marc Kleine-Budde , Vincent Mailhol , Geert Uytterhoeven , Magnus Damm Cc: Biju Das , linux-can@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar Mahadev Lad , Biju Das Subject: [PATCH v2 2/2] can: rcar_canfd: Add support for FD-Only mode Date: Sun, 23 Nov 2025 11:23:21 +0000 Message-ID: <20251123112326.128448-3-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251123112326.128448-1-biju.das.jz@bp.renesas.com> References: <20251123112326.128448-1-biju.das.jz@bp.renesas.com> 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 Content-Type: text/plain; charset="utf-8" From: Biju Das The RZ/{G2L,G3E} and R-Car Gen4 SoCs support additional CAN FD mode called FD-only mode. In this mode, communication in Classical CAN frame format is disabled. Signed-off-by: Biju Das --- v1->v2: * Dropped has_fd_only_mode variable from the struct rcar_canfd_hw_info as it is checked by the dt schema validation. --- drivers/net/can/rcar/rcar_canfd.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_= canfd.c index 05dbdf46dd6f..00c3462fc975 100644 --- a/drivers/net/can/rcar/rcar_canfd.c +++ b/drivers/net/can/rcar/rcar_canfd.c @@ -471,6 +471,7 @@ struct rcar_canfd_global { unsigned long channels_mask; /* Enabled channels mask */ bool extclk; /* CANFD or Ext clock */ bool fdmode; /* CAN FD or Classical CAN only mode */ + bool fd_only_mode; /* FD-Only mode for CAN-FD */ struct reset_control *rstc1; struct reset_control *rstc2; const struct rcar_canfd_hw_info *info; @@ -828,12 +829,20 @@ static int rcar_canfd_reset_controller(struct rcar_ca= nfd_global *gpriv) RCANFD_GEN4_FDCFG_FDOE); rcar_canfd_set_bit_reg(&gpriv->fcbase[ch].cfdcfg, RCANFD_GEN4_FDCFG_CLOE); + } else if (gpriv->fd_only_mode) { + rcar_canfd_clear_bit_reg(&gpriv->fcbase[ch].cfdcfg, + RCANFD_GEN4_FDCFG_CLOE); + rcar_canfd_set_bit_reg(&gpriv->fcbase[ch].cfdcfg, + RCANFD_GEN4_FDCFG_FDOE); } else { rcar_canfd_clear_bit_reg(&gpriv->fcbase[ch].cfdcfg, RCANFD_GEN4_FDCFG_FDOE); rcar_canfd_clear_bit_reg(&gpriv->fcbase[ch].cfdcfg, RCANFD_GEN4_FDCFG_CLOE); } + } else if (gpriv->fd_only_mode) { + rcar_canfd_set_bit_reg(&gpriv->fcbase[ch].cfdcfg, + RCANFD_GEN4_FDCFG_FDOE); } } =20 @@ -2041,6 +2050,9 @@ static int rcar_canfd_probe(struct platform_device *p= dev) gpriv->fdmode =3D fdmode; gpriv->info =3D info; =20 + if (of_property_read_bool(dev->of_node, "renesas,fd-only")) + gpriv->fd_only_mode =3D true; /* FD-Only mode for CAN-FD */ + gpriv->rstc1 =3D devm_reset_control_get_optional_exclusive(dev, "rstp_n"); if (IS_ERR(gpriv->rstc1)) return dev_err_probe(dev, PTR_ERR(gpriv->rstc1), @@ -2190,7 +2202,7 @@ static int rcar_canfd_probe(struct platform_device *p= dev) platform_set_drvdata(pdev, gpriv); dev_info(dev, "global operational state (%s clk, %s mode)\n", gpriv->extclk ? "ext" : "canfd", - gpriv->fdmode ? "fd" : "classical"); + gpriv->fdmode ? (gpriv->fd_only_mode ? "fd-only" : "fd") : "classical"); return 0; =20 fail_channel: --=20 2.43.0