[{"id":3668982,"web_url":"http://patchwork.ozlabs.org/comment/3668982/","msgid":"","list_archive_url":null,"date":"2026-03-25T10:42:38","subject":"Re: [PATCH 1/2] dt-bindings: i2c: spacemit: k3: Add compatible","submitter":{"id":91240,"url":"http://patchwork.ozlabs.org/api/people/91240/","name":"Troy Mitchell","email":"troy.mitchell@linux.spacemit.com"},"content":"On Wed Mar 25, 2026 at 5:49 PM CST, Yixun Lan wrote:\n> Add a compatible string for the I2C controller found in SpacemiT K3 SoC\n> which use same I2C IP as K1, so make it fallback to K1 compatible.\n>\n> Signed-off-by: Yixun Lan \n> ---\n> Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml | 6 +++++-\n> 1 file changed, 5 insertions(+), 1 deletion(-)\n>\n> diff --git a/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml b/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml\n> index 5896fb120501..8c04c675b25e 100644\n> --- a/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml\n> +++ b/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml\n> @@ -14,7 +14,11 @@ allOf:\n> \n> properties:\n> compatible:\n> - const: spacemit,k1-i2c\n> + oneOf:\n> + - items:\n> + - const: spacemit,k3-i2c\n> + - const: spacemit,k1-i2c\n> + - const: spacemit,k1-i2c\n> \n> reg:\n> maxItems: 1\nReviewed-by: Troy Mitchell ","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-i2c@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=linux.spacemit.com header.i=@linux.spacemit.com\n header.a=rsa-sha256 header.s=mxsw2412 header.b=tWIvrTi9;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; 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charset=UTF-8","Date":"Wed, 25 Mar 2026 18:42:38 +0800","Message-Id":"","Subject":"Re: [PATCH 1/2] dt-bindings: i2c: spacemit: k3: Add compatible","From":"\"Troy Mitchell\" ","To":"\"Yixun Lan\" , \"Andi Shyti\" ,\n \"Rob Herring\" , \"Krzysztof Kozlowski\"\n , \"Conor Dooley\" , \"Paul Walmsley\"\n , \"Palmer Dabbelt\" , \"Albert Ou\"\n , \"Alexandre Ghiti\" , \"Troy Mitchell\"\n ","Cc":", ,\n , ,\n ","X-Mailer":"aerc 0.21.0-0-g5549850facc2","References":"<20260325-02-k3-i2c-v1-0-78f29c83d9ac@kernel.org>\n <20260325-02-k3-i2c-v1-1-78f29c83d9ac@kernel.org>","In-Reply-To":"<20260325-02-k3-i2c-v1-1-78f29c83d9ac@kernel.org>","X-QQ-SENDSIZE":"520","Feedback-ID":"esmtpgz:linux.spacemit.com:qybglogicsvrgz:qybglogicsvrgz3a-0","X-QQ-XMAILINFO":"NlUc2cqXmL74TKJKu5byzUENTnLS3Dfj1FqhBpm5R4s1CdLKXqBWIXcn\n\tz+f5WuxC1g04rlcwXNpskDISEWT7vyUaYikL88cCg+PTIqCdSxvThx2qfmUfEr5qvJQ7MEL\n\t8m45F3b5s1CeD2H6pS5VTGgCes664S+VFdNMLVX4uE+8wWyE57k9h6d4uNclzoB2ECPE/ci\n\t055EjRgNYXTEFJywBXcFOhL8THFQHsOsDEVEHas6TaFory7xAXhFsqsN8kO6bcLhth2gBEv\n\t8ncV8f9VbOzlkB9qw5R3JwbHsNyYqWi5++NvdmV6X7jKD1v04wpelhUj7/rW4uG1UgIVkXF\n\tLILCdAcJ77MisOHh8QvJV1vbkNpwxJfc75K2KbyF90OkomBX1ZcoB8HSuhoegEDk+yED54N\n\tVfCk3BH2PTyNHt+XKxNPKorzV9g66MlGLGZDNtH5raJYbsGZ6gPfnGfDow6jM7aRBnIMubh\n\tWuxTnX29oSpJeVnuBjUcYd69WAhXEfTgjvyydCioLgfS2dlzHBEUQB5KYVLL/WRSI7NEeiX\n\tpGi90qBggoUZW+0RynAMhKgHKohQjRKR6neW3D864u6loSE0S2T3o1yrQbro4B+xoZkOPOw\n\towXKBF3KYT9eULVaw1J2WRvlQlV97Fm1Aoo0F0w09MWmH/PnsEKvjgBYVrdDrLcs8RhaiQj\n\tfsfq9HEUnaqFESQ2H0K4A7R0uRuD+RLU+tqSn7W+0UNJQjNVltvkynwUIOHT8qX8pLFUowo\n\tt9utEXQRac8+Nf4cQvFNWatlSPruz+9ozlk8JtkwKS4MWOiRG9LMf2S8WE+O97x2iph9XBa\n\tptDVTqhss3L8y2NIqHchYuUGYv0hSw7JV4cv9O49TeHUnpVwG2RuAFCA7IZwkIymassLfyx\n\t8vGZgnK4HAiJsk+UlgWKmAEYbxDs9WKRZ+jDcfNLNMHEEQc5XDeUXvk8hztK0aQxK1dtTvh\n\tnSQ5XoB5X1aIG8NzUmGB9mZCxFXuZ7G/aWHMIvu5HCe5k5KxDEeXqZAjB9WfBkzOyc5HTdF\n\tUEFmU0o+jraHG+HuPO7FBGnSX6NxgimC806U0RdJan1Lce0qOvvfcsMR8TgjU=","X-QQ-XMRINFO":"Mp0Kj//9VHAxzExpfF+O8yhSrljjwrznVg==","X-QQ-RECHKSPAM":"0"}},{"id":3669099,"web_url":"http://patchwork.ozlabs.org/comment/3669099/","msgid":"<87zf3w6o6q.fsf@ocarina.mail-host-address-is-not-set>","list_archive_url":null,"date":"2026-03-25T13:20:13","subject":"Re: [PATCH 1/2] dt-bindings: i2c: spacemit: k3: Add compatible","submitter":{"id":72132,"url":"http://patchwork.ozlabs.org/api/people/72132/","name":"Javier Martinez Canillas","email":"javierm@redhat.com"},"content":"Yixun Lan writes:\n\n> Add a compatible string for the I2C controller found in SpacemiT K3 SoC\n> which use same I2C IP as K1, so make it fallback to K1 compatible.\n>\n\nIf is the same IP as K1, shouldn't the \"spacemit,k1-i2c\" compatible be\nused in the k3.dtsi instead? My understanding is that this is the meaning\nof compatible, and there's no need to add another compatible string for k3.","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-i2c@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=V6FZAy69;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=JmMc829p;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; helo=tor.lore.kernel.org;\n envelope-from=linux-i2c+bounces-16741-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com\n header.b=\"V6FZAy69\";\n\tdkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com\n header.b=\"JmMc829p\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=170.10.129.124","smtp.subspace.kernel.org;\n dmarc=pass (p=quarantine dis=none) header.from=redhat.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=redhat.com"],"Received":["from tor.lore.kernel.org (tor.lore.kernel.org\n [IPv6:2600:3c04:e001:36c::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fgnzW3MxPz1xy1\n\tfor ; Thu, 26 Mar 2026 00:38:15 +1100 (AEDT)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby tor.lore.kernel.org (Postfix) with ESMTP id BF5F631A8C56\n\tfor ; Wed, 25 Mar 2026 13:20:30 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 3ABBC3DA5B4;\n\tWed, 25 Mar 2026 13:20:21 +0000 (UTC)","from us-smtp-delivery-124.mimecast.com\n (us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id BEACF3CCFDF\n\tfor ; Wed, 25 Mar 2026 13:20:19 +0000 (UTC)","from mail-wr1-f71.google.com (mail-wr1-f71.google.com\n [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS\n (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n us-mta-427-PQTlEPIQObeeF7mFuAerYQ-1; Wed, 25 Mar 2026 09:20:17 -0400","by mail-wr1-f71.google.com with SMTP id\n ffacd0b85a97d-439af7ba802so4825587f8f.2\n for ; Wed, 25 Mar 2026 06:20:17 -0700 (PDT)","from localhost (62-151-111-63.jazzfree.ya.com. 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micalg=pgp-sha512;\n\tprotocol=\"application/pgp-signature\"; boundary=\"FMGqwg53RZq43Ijf\"","Content-Disposition":"inline","In-Reply-To":"<20260325-02-k3-i2c-v1-1-78f29c83d9ac@kernel.org>"}},{"id":3669264,"web_url":"http://patchwork.ozlabs.org/comment/3669264/","msgid":"<20260325-thinning-apricot-c156914803d6@spud>","list_archive_url":null,"date":"2026-03-25T18:16:43","subject":"Re: [PATCH 1/2] dt-bindings: i2c: spacemit: k3: Add compatible","submitter":{"id":84372,"url":"http://patchwork.ozlabs.org/api/people/84372/","name":"Conor Dooley","email":"conor@kernel.org"},"content":"On Wed, Mar 25, 2026 at 02:20:13PM +0100, Javier Martinez Canillas wrote:\n> Yixun Lan writes:\n> \n> > Add a compatible string for the I2C controller found in SpacemiT K3 SoC\n> > which use same I2C IP as K1, so make it fallback to K1 compatible.\n> >\n> \n> If is the same IP as K1, shouldn't the \"spacemit,k1-i2c\" compatible be\n> used in the k3.dtsi instead? My understanding is that this is the meaning\n> of compatible, and there's no need to add another compatible string for k3.\n\nYour understanding is incorrect! What Yixun has done here is what we\nwant people to do, because even if the IP is the same there can be\ndifferences due to integration that are problematic. Having a device\nspecific compatible allows us to handle these kinds of problems if they\ncrop up in the future.","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-i2c@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=IuF3YWGv;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=linux-i2c+bounces-16777-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=\"IuF3YWGv\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=10.30.226.201"],"Received":["from sea.lore.kernel.org (sea.lore.kernel.org\n [IPv6:2600:3c0a:e001:db::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fgwL40mjnz1xy1\n\tfor ; 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micalg=pgp-sha512;\n\tprotocol=\"application/pgp-signature\"; boundary=\"PJMmZAkwfk4triIZ\"","Content-Disposition":"inline","In-Reply-To":"<87zf3w6o6q.fsf@ocarina.mail-host-address-is-not-set>"}},{"id":3669518,"web_url":"http://patchwork.ozlabs.org/comment/3669518/","msgid":"<87wlyz6nhx.fsf@ocarina.mail-host-address-is-not-set>","list_archive_url":null,"date":"2026-03-26T07:47:22","subject":"Re: [PATCH 1/2] dt-bindings: i2c: spacemit: k3: Add compatible","submitter":{"id":72132,"url":"http://patchwork.ozlabs.org/api/people/72132/","name":"Javier Martinez Canillas","email":"javierm@redhat.com"},"content":"Conor Dooley writes:\n\nHello Conor,\n\n> On Wed, Mar 25, 2026 at 02:20:13PM +0100, Javier Martinez Canillas wrote:\n>> Yixun Lan writes:\n>> \n>> > Add a compatible string for the I2C controller found in SpacemiT K3 SoC\n>> > which use same I2C IP as K1, so make it fallback to K1 compatible.\n>> >\n>> \n>> If is the same IP as K1, shouldn't the \"spacemit,k1-i2c\" compatible be\n>> used in the k3.dtsi instead? My understanding is that this is the meaning\n>> of compatible, and there's no need to add another compatible string for k3.\n>\n> Your understanding is incorrect! What Yixun has done here is what we\n> want people to do, because even if the IP is the same there can be\n> differences due to integration that are problematic. Having a device\n> specific compatible allows us to handle these kinds of problems if they\n> crop up in the future.\n\nThanks for the clarification! It seems the convention changed over the\nyears then.","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-i2c@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=bR6jeV/U;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=DlpuwW/i;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=linux-i2c+bounces-16793-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com\n header.b=\"bR6jeV/U\";\n\tdkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com\n header.b=\"DlpuwW/i\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=170.10.129.124","smtp.subspace.kernel.org;\n dmarc=pass (p=quarantine dis=none) header.from=redhat.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=redhat.com"],"Received":["from sea.lore.kernel.org (sea.lore.kernel.org\n [IPv6:2600:3c0a:e001:db::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fhGFF41YNz1y1x\n\tfor ; Thu, 26 Mar 2026 18:51:45 +1100 (AEDT)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id 2E8EE305309D\n\tfor ; Thu, 26 Mar 2026 07:47:32 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id A004E3B2FD5;\n\tThu, 26 Mar 2026 07:47:30 +0000 (UTC)","from us-smtp-delivery-124.mimecast.com\n (us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 2280933B6E8\n\tfor ; Thu, 26 Mar 2026 07:47:28 +0000 (UTC)","from mail-wr1-f70.google.com (mail-wr1-f70.google.com\n [209.85.221.70]) by relay.mimecast.com with ESMTP with STARTTLS\n (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n us-mta-513-Dw7MfP9uOiKWXhf1LJFHdQ-1; Thu, 26 Mar 2026 03:47:25 -0400","by mail-wr1-f70.google.com with SMTP id\n ffacd0b85a97d-43b4d3919e4so385997f8f.0\n for ; Thu, 26 Mar 2026 00:47:25 -0700 (PDT)","from localhost (62-151-111-63.jazzfree.ya.com. 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