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[86.162.200.138]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42cbd764dbesm38197188f8f.27.2025.11.26.07.59.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Nov 2025 07:59:13 -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 v4 1/2] dt-bindings: can: renesas,rcar-canfd: Document renesas,fd-only property Date: Wed, 26 Nov 2025 15:59:06 +0000 Message-ID: <20251126155911.320563-2-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251126155911.320563-1-biju.das.jz@bp.renesas.com> References: <20251126155911.320563-1-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 Reviewed-by: Krzysztof Kozlowski --- v3->v4: * Dropped the node added in example for just testing. v2->v3: * Added check to disallow the usage of both fd-only and no-can-fd. v1->v2: * Added conditional check to disallow fd-only mode for R-Car Gen3. --- .../bindings/net/can/renesas,rcar-canfd.yaml | 38 +++++++++++++++++-- 1 file changed, 35 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..e129bdceef84 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: + $ref: /schemas/types.yaml#/definitions/flag + description: + The CANFD on RZ/{G2L,G3E} and R-Car Gen4 SoCs support 3 modes FD-Only + mode, Classical CAN mode and CAN-FD mode (default). In FD-Only mode, + communication in Classical CAN frame format is disabled. Specify this + property to put the controller in FD-Only mode. =20 assigned-clocks: description: @@ -267,6 +275,30 @@ allOf: patternProperties: "^channel[6-7]$": false =20 + - if: + properties: + compatible: + contains: + enum: + - renesas,rcar-gen3-canfd + then: + properties: + renesas,fd-only: false + + - if: + required: + - renesas,no-can-fd + then: + properties: + renesas,fd-only: false + + - if: + required: + - renesas,fd-only + then: + properties: + renesas,no-can-fd: false + unevaluatedProperties: false =20 examples: --=20 2.43.0 From nobody Mon Dec 1 22:37:31 2025 Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) (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 D5C2033BBCC for ; Wed, 26 Nov 2025 15:59:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764172760; cv=none; b=alPx/lXCflV7npBA+MkoelW9+VCF/h+9CrC4AJfbE1ApYI4nnSYGqVbdfm7iuMLkr0XgMLi38UYHaY76Ke5VouQvFIXUyBHqAfC9bnqfm7+i7Qa4g8keaGqQ0GniRNYij3NW7kn5LjaxVvKOFEP43fR/UR7VoMTufARLoktZ+N8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764172760; c=relaxed/simple; bh=ydjOpRaxNg7YwCkCtWQyF8hCOLVtl98EpZSQZcqLxvQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dM1DXhUvFAkau708IbI38n4/v6zeg4ayYA+Pw04bP1WIqOIQ0DVOB0smiU/QBuRVkS4owpm8Vw0G3+4p9Nk7vyUJhe/p3nHT4EXk49IGKdK4EedatryiPB0EwBRQLOcLuXDMDueMDfAAt9fZxZzRW2N9Kl8iNChFYdGG/A4rvZE= 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=OgNzWl2I; arc=none smtp.client-ip=209.85.128.46 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="OgNzWl2I" Received: by mail-wm1-f46.google.com with SMTP id 5b1f17b1804b1-477a2ab455fso73607325e9.3 for ; Wed, 26 Nov 2025 07:59:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1764172755; x=1764777555; 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=l5fvguYl1zizKX5NssUxSVoIdbxzR3UiqnQ1nTNgMuk=; b=OgNzWl2IIZ1ZVOK7VKWsj2mrkmqMgrLr6NfCUDhgjcbIC8eIgCw84dNRjbgNk3D/yN 30KoONBjYg6nEdik6Yg9qVqnwxtkhUaDq9zGysleCTVqDaQh/tjYZfWhv5DCB5My4tEh 1E76qEGk84U5Fh3rSiau38jcu4lE0daZ5RlktuSaPhPbPIfYYfwz6ZTsaAQb4otIJtAV V5dpqKSuOtZkyqVtV9Nfef/WHVADAmaK2iRftgDc3nbC6571onix35Nd10M8aQw5dk7x FjiOnxVG+F23gLh2qayQtXirw9K1Mpl8zv98nqA0ScceC5Zl5eOd0HzSHXD8ZhZGJMcA 4fOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764172755; x=1764777555; 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=l5fvguYl1zizKX5NssUxSVoIdbxzR3UiqnQ1nTNgMuk=; b=X2cxoGL4LMuvOXkXAvO8q0ICDeLjXZgvvBWRaAoo0+KKwIMlIyIM8vPZhkyfUXSPoU dEpLl2FCnZDKSmFY1AnT/Rk6DmDxNq+w245Eq5OXYibMyPQ0y1sIpRaRaJDo6JKKXvFt 7/jtzVUKKYzV1w139FFC9cotqGn/f7LWUyf7hjeq42wQhseH/fh0APrtZoviAERbUnoU Gsi+YjL3QRqomQSAYNTqbsz2k7O4OtsR2cCE3LnXLBTRRhf7YqRiNPcNDq1+g9LVOp6m 4Qlxiq9/1aJbnHAvffeUrxd4XUac7nypBy2BqjAAnywgsCEB80lnzb3ZBXXRXmrDq/LL IGew== X-Forwarded-Encrypted: i=1; AJvYcCXb/wB7BdaQl/QHa8+MQSVqCtjctjSl8ynb/pKcJ3lZjQ5bQcv/VzuFV3O7JnDERyUuwgnKATfUGgrqYHc=@vger.kernel.org X-Gm-Message-State: AOJu0YzWrlkPdPrpgK1CUGOcMZq4OCUyGtPXWCfYXxDvom4VZlCi203w yFQoAFQCIRF2PkjCMjUdOii4KeBJ/vUThtgnKUYPYsz8kR6Qw/YO2vba X-Gm-Gg: ASbGncupwX8VKQzMWfqUWNaYZMJRY/6+vjw2gcMSMWswfwDgRprLqHrfLkyB6JYXrxc eAgFCV4igVuY9DtA/4m7nHSS6s8H0yir2gGFEXqA58+bLMdhKs7DDrW18wOAQI6OOPXk39KbBXu m5a6pl4i/2ijGuqkVRBqOZKXb71Hhi/7EyYDR49FVNURC00N97eeTMAjnCy2GL9/wNpqiyy8Pda CSLbVf/TxA4JRzwjbUjQGT5YoOdo7xwKRI03R88IG9D2NPFpbdu+5xPFN3mCvXoPc0qSUIhZ21D qhNza/lE8GfQsut2cCzSKxteR69QHzbUDLXn5kOXEL/YYHI9m0L4QbXSybyKFcmBXTNT9lupYVS 3/ziCZBqDFIEdKnmNYQ0iJHNF7imQqYVw/zxkTO7ru5ix/eDIlQ2uOragSF/sEM1UW2cchxDgtL OcGKi8j6LrYuUZpoTU+cmBYbGryk4I0idQUM905bEjhuIGJwiC7dcJPT9mwy0uunoEqQwC+uU= X-Google-Smtp-Source: AGHT+IGyt3DEYJ79rUQUGpCk+m0qe0BU3xv0UEECi0UxrG2a3LOAONqj/7nbU56S+XYd/VMVJgekrw== X-Received: by 2002:a05:600c:46cd:b0:475:dc5c:3a89 with SMTP id 5b1f17b1804b1-477c1136b7fmr186322025e9.34.1764172754641; Wed, 26 Nov 2025 07:59:14 -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-42cbd764dbesm38197188f8f.27.2025.11.26.07.59.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Nov 2025 07:59:14 -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 v4 2/2] can: rcar_canfd: Add support for FD-Only mode Date: Wed, 26 Nov 2025 15:59:07 +0000 Message-ID: <20251126155911.320563-3-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251126155911.320563-1-biju.das.jz@bp.renesas.com> References: <20251126155911.320563-1-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 --- v3->v4: * No change. v2->v3: * No change. 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 7895e1fdea1c..4a653d8978ba 100644 --- a/drivers/net/can/rcar/rcar_canfd.c +++ b/drivers/net/can/rcar/rcar_canfd.c @@ -472,6 +472,7 @@ 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; @@ -829,12 +830,20 @@ 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 @@ -2140,6 +2149,9 @@ 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), @@ -2239,7 +2251,7 @@ 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