From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E67B7482C8; Thu, 20 Jun 2024 08:29:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718872183; cv=none; b=EHXWeXFw9Nhkz7XsxybBy6nVtjtBIlFMVBtNepezufT3fmoUKyglg8xGiLgA3sO/FDEgzQYeuAWUQcd++tzSv8Pq7nGPVxVkQm3cko7hwm/1yDgKfLApQ4m823o00S8FvSC1bADbP7aiKbfRJoYnE/Bml3xt/2TIuBksDbNobCQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718872183; c=relaxed/simple; bh=xnidyzQB+078M+inmBdQiDXTphVNNmg8dPEaCmWi54c=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ugZBUJVLlx2Xn11ptBrQExEQ4kvAabR+IvT7Mb0IWC8f5dEH3A6il0fg/GARu2VjDxs0NRT+ci03XGclpuNV7/Uz0Mpdim8x8afjuuiXVJZSZl49FMpsPq0jzku+XQ4WtZVasn1gb06IZEGAyd9klRqmB1oA9jHbVFUH2Nz/0Lw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tkVQD7q/; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="tkVQD7q/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54F8BC2BD10; Thu, 20 Jun 2024 08:29:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718872182; bh=xnidyzQB+078M+inmBdQiDXTphVNNmg8dPEaCmWi54c=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=tkVQD7q/C2zRMlqpMvO5kbs8RMF/1hlwEllihlQcrRreeILEZKgvDrHWRW66XpcZ8 jM4V6QFamsADmwBCZkoST59+iIeACrrjvbEdeaXcRfDxKjhlcKZMSA396ShN3PdmI7 7d12I0rHwFBr+ZeOtA089dw8klWhb52ymGhiK9sB6BXuE1M5NeDMAz18Z5C6U3+9ZQ 4jyWYFS4I0lKHu9NKqf0KwLG48p7mLmjQwRGrGTIzetGJb7+imDCzxz1RBE+TqhMJv 9Qd0WzFikMeXAX4GUJhSg8hPT3TjoIFjz4GgbiLFzv0zyp3+FR5jiFEwCeG4W8TQ5t V2RQsXIr0Qe9w== Message-ID: <14bebdc5-3239-47fe-b8cc-68daba278d73@kernel.org> Date: Thu, 20 Jun 2024 10:29:35 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: soc: ti: pruss: allow ethernet controller in ICSSG node To: Matthias Schiffer Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux@ew.tq-group.com, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Suman Anna References: <20240619112406.106223-1-matthias.schiffer@ew.tq-group.com> <89880cda-1140-4ed5-a67f-2201c2825447@kernel.org> <99cc7afbb891de890ff051606f7a120f796e0fbc.camel@ew.tq-group.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 20/06/2024 10:26, Matthias Schiffer wrote: > On Thu, 2024-06-20 at 09:24 +0200, Krzysztof Kozlowski wrote: >> On 19/06/2024 13:24, Matthias Schiffer wrote: >>> While the current Device Trees for TI EVMs configure the PRUSS Ethernet >>> controller as a toplevel node with names like "icssg1-eth", allowing to >>> make it a subnode of the ICSSG has a number of advantages: >> >> What is ICSSG? The sram or ti,prus from the ethernet schema? > > ICSSG (Industrial Communication Subsystem (Group?)) is the main device described by the > ti,pruss.yaml binding (ICSS and PRUSS are different variants of similar IP cores); it is the > container for the individual PRU, TXPRU and RTU cores which are referenced by the ti,prus > node of the Ethernet schema. > > The entirety of PRU, TXPRU and RTU cores of one ICSSG, each with its own firmware, forms one > Ethernet controller, which is not quite a hardware device, but also not a fully virtual software > device. So it is not really child of ICSSG. > > The Ethernet controller only exists through the various ICSS subcores, so it doesn't have an MMIO > address of its own. As described, the existing Device Trees define it as a toplevel non-MMIO node; > we propose to allow it as a non-MMIO child node of the ICSSG container instead. > > If you consider moving the ethernet node into the ICSSG node a bad approach, we will drop this patch > and try to find a different solution to our issue (the Ethernet device staying in deferred state > forever when the ICSSG node is disabled on Linux). Just disable the ethernet. That's the expected behavior, I don't get what is the problem here. Best regards, Krzysztof