From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 105A02E764D; Mon, 17 Aug 2026 06:18:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786947499; cv=none; b=boD4zc08K5njLRTU+zQLJsOklzxeG83Y/O5R7l8Kx/FmBBmq1lKhIJOspKwLmNvEPx8dCA0dYEyKktofIRWLagW8/FnBOrSd8nQ3Jsr6+8GeJGv1hsxyLiytbze4o1/37VAA1BHGxS2jS2fQsNeSfUIzszxSpz4P/8neINGvtVQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786947499; c=relaxed/simple; bh=6zY38GERX3mOP9G00zjqp19y44VLaj6OChmDUhBxSXQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=pJ+b83XMcS2ZEcxhe2kcfDpyZ638wvKdtaqv9KLW2IivomHek/CfskqFDRpC0KJpOv6pFPSXnmm5r+ZeazSaH7wLvRXaCq1ok3z/m8/OvHqP9/OrMY9Rb4utwv9cOnaMAemk7yc8MuXFwyeJyR3HlIYl7mszc8pMkFA8r1dZyOw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=F4CN9ssn; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="F4CN9ssn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC5E91F000E9; Mon, 17 Aug 2026 06:18:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786947497; bh=unyuOr+Qc27kqzZyFSVm3V4SNPxVTR7Mb0afAhFXktM=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=F4CN9ssnszl+EJbaMlcCk+jEUKq7CAUZv/QOslkgg7dGVE+Pg1ZMwPan+1P37Vgu5 NKMim8uHZdr1At6Xpw5ya4Fiht4rvuoqk/puN/VESCi/WmakyKAccXWSdmFExx6LOB 7Bu8COF4f8J1Q6ZtsBmRfTnkVcsNUebKVP6aE5GnCCbjidCbL/wblek1ImQLpb6VBm D8UiYrA1ILzMgMusFo6t7HNJ/QDaQdvPnm9Hj1ZABQBf1zV93c3zUj+EXZ6QDbPqV4 NEqy8C4pTmogI1q95zqEGxbG/OoadbEP4cfSw7cDh2BJo8D/PaUWHBHzUFjsvoqXm2 5e5R30bXz8UUw== Message-ID: <55991af4-c613-4cde-a121-30f2ff9c8347@kernel.org> Date: Mon, 17 Aug 2026 08:18:11 +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: misc: introduce pci1179,0220.yaml To: Alex Elder Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, arnd@arndb.de, gregkh@linuxfoundation.org, bhelgaas@google.com, daniel@riscstar.com, mohdayaa@qti.qualcomm.com, lbiancon@qti.qualcomm.com, devicetree@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260813222943.1655453-1-elder@riscstar.com> <20260813222943.1655453-2-elder@riscstar.com> <20260814-deft-unnatural-teal-1dbac3@quoll> <8c33e30a-e35e-47d4-a851-c82e18ed7472@riscstar.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzSVLcnp5c3p0b2Yg S296bG93c2tpIDxrcnprQGtlcm5lbC5vcmc+wsGPBBMBCgA5AhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgBYhBJvQfg4MUfjVlne3VBuTQ307QWKbBQJp2mE8AAoJEBuTQ307QWKbeaIP /ihHTkTW4KsN/DQ945JJbyu5tI0J80Wue7QyyLPglyKfhgb5cLLNPpOC8cCIJsc7+W3i2P38 s2c1cOH6CYGE7E9ur3Vfme8NW2S2I/Z8VC7bZnzyS23wT17LrsdS/qCpx4o8U+pt/xdXDKph EGRYrIEmMpUWvyYzyYKGIe25FtaayIIKpq8eZYyFcp2f/sG5IkOW5uZzHPMPdcm87jU7fyuQ rAU2vx9r+ulUfQ/q9Z2roC/ode3l7t2pN7BCBCsUDp6JCrUyZrtT1e7EbA0ZRP3aOBNk2P2E DQOgJGjGdO5Yx2Y9LFtltu6JbsBJHi1syGRX3AtQYOMc4Y1WGoeZJmMlvKj2ZqqXNkcWi2DS IQEWB0uW6CqFsBBIMGDa+6OzdaVO/uAVXWDWml02Men3CILdI1MbVjoh8ECqYUY7OQ+JJvNN vnliuq5WM3Ghd3jg/LZZrxXjdIginRHFQCjIJYLKpLZWm1/iDFedcfzqRNYmTtqscdCNHW41 oT3Z7BmO9xwdjuwBS6nmS6JJwkbf5Ot2QR4pB/DRU7ZwjT1qHe+9r9gF32wXVQatHNGK/VVu sfwOnkdxCWkp/qb2gdQRmZh+SedStWshigH6sNfuHBloF/q+hjMRc8b2m326OZdrbSHwY1Sz vti8Hn7n8NjdHO9LKB7BIdjkA9DA5WsqOuVCzsFNBFVDXDQBEADNkrQYSREUL4D3Gws46JEo Z9HEQOKtkrwjrzlw/tCmqVzERRPvz2Xg8n7+HRCrgqnodIYoUh5WsU84N03KlLueMNsWLJBv BaubYN4JuJIdRr4dS4oyF1/fQAQPHh8Thpiz0SAZFx6iWKB7Qrz3OrGCjTPcW6eiOMheesVS 5hxietSmlin+SilmIAPZHx7n242u6kdHOh+/SyLImKn/dh9RzatVpUKbv34eP1wAGldWsRxb f3WP9pFNObSzI/Bo3kA89Xx2rO2roC+Gq4LeHvo7ptzcLcrqaHUAcZ3CgFG88CnA6z6lBZn0 WyewEcPOPdcUB2Q7D/NiUY+HDiV99rAYPJztjeTrBSTnHeSBPb+qn5ZZGQwIdUW9YegxWKvX XHTwB5eMzo/RB6vffwqcnHDoe0q7VgzRRZJwpi6aMIXLfeWZ5Wrwaw2zldFuO4Dt91pFzBSO IpeMtfgb/Pfe/a1WJ/GgaIRIBE+NUqckM+3zJHGmVPqJP/h2Iwv6nw8U+7Yyl6gUBLHFTg2h YnLFJI4Xjg+AX1hHFVKmvl3VBHIsBv0oDcsQWXqY+NaFahT0lRPjYtrTa1v3tem/JoFzZ4B0 p27K+qQCF2R96hVvuEyjzBmdq2esyE6zIqftdo4MOJho8uctOiWbwNNq2U9pPWmu4vXVFBYI GmpyNPYzRm0QPwARAQABwsF2BBgBCgAgAhsMFiEEm9B+DgxR+NWWd7dUG5NDfTtBYpsFAmna YUkACgkQG5NDfTtBYptX+BAApg32CkxwNucNEi8WfWA8oKkW0y8YDuY6ORMo9FWNGiT/OTy0 vyJrLocrpn86zwfjVp+eCrssPYh8eqJfnWqmYv6ACQtHPYzPZQ3mSo8H97Z01oUxITzCxpXm ZkLgPIqtDPcC2E3dPM/fVxcyowM8XsaMA9wcsaUYrta8toOq2b9tKcjleKMfMrm0gQ9u7wUc QbLkwj6TCLOwucb07GXzLTNF9PZmaDUpKAZjMjmrW+le+SFvQbhamx0rxLWPR0NWntXpbCn+ +ACch03p/JyTBVktxFsFyCt7pTPE1kEaeuXBTe/a2D9iQvRxRW19LvuO2e59/u1wYUiH/orz wbIC2S4dBsPAPihL3ztOU1yE86GPyQtSE0kU+/7snnLt4QGi6PChf3t5gnNjAzjUUovO8rgI c+5yN5heq5loYHgK6OQ9OlHzsPHO9e9MOQcKlFycs1pyijFGzDwdNUm/SchK8iWT2QApTx4A K9bCVaboTA2T77QYkRcRJYSsO1alGX0ome/hMLD1daXlkrNUp1HWa3K4iytLRXjCSIorWiGs n+q3krnpXu3TFkA8qtOFZMdnIiFuiq1yLT8hptsV5xh1TA2nsVvSYiaCr3q4s4BKjS/KrLDb qoxzw8ISjdUp4pA85vb6YLCmb39NgidD+7PmAr65lBNveIFynTgsja1rRQ4= In-Reply-To: <8c33e30a-e35e-47d4-a851-c82e18ed7472@riscstar.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 14/08/2026 18:55, Alex Elder wrote: > On 8/14/26 2:01 AM, Krzysztof Kozlowski wrote: >> On Thu, Aug 13, 2026 at 05:29:41PM -0500, Alex Elder wrote: >>> Define the binding for the Toshiba TC9564 PCI endpoint function device. >>> The third downstream PCIe switch port within this chip has an embedded >>> PCIe controller, and that implements two of these PCIe functions. >>> >>> Signed-off-by: Daniel Thompson >>> Signed-off-by: Alex Elder >>> --- >>> .../bindings/misc/pci1179,0220.yaml | 150 ++++++++++++++++++ >>> MAINTAINERS | 6 + >>> 2 files changed, 156 insertions(+) >>> create mode 100644 Documentation/devicetree/bindings/misc/pci1179,0220.yaml >>> >> >> There are no properties in the binding except standard PCIe ones, so why >> do you need it in DT in the first place? We do not describe PCI devices >> in DT by default, so you are doing something unusual. Commit msg should >> explain that. > > Maybe because it's using pci-ep-bus? I'm not sure I can answer your > question though. What is pcie-ep bus? If a device is a PCI device (so not the host bridge), we do not need to define it in DT except a few cases and this does not look like one. > > An earlier version used auxiliary devices. This time the PCI device > sort of stands by itself as provider of the endpoint buses that are > used by other devices within the SoC. There is otherwise no single > driver (e.g., for an Ethernet interface) that is implemented as a > PCI driver to bind with the hardware. The SoC drivers will all be > platform drivers. All this is driver explanation, so does not really answer my questions. Whether something is using platform bus or auxiliary devices it absolutely does not matter for the DT. It cannot even matter for DT. Best regards, Krzysztof