From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A70E1606A32A for ; Thu, 12 Nov 2026 18:59:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=09YbsaEz DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Unsubscribe-Post:List-Owner; bh=0J35JZ6m+w9sBvce+BHkK7sHy2n6yiNgOnlVQ5/R2aM=; b=09YbsaEzCr5EBTN3yGZLoQdE80 PRrWr+tH+u1NU5kP2znf588O5I7n/zsqfmDHVP4GRuAPRJZQH4quYjQyGuQutVUYUzKKqP7nqhsZ0 4CO70oHT+gZ0NVGKiiMVFMAQlPub8KmSZCEd3bUGFLPdVdrkBKpcnFvf8iwxROi1vWVKk3VJz3bC8 aBAHHGpFmEdf4zUNjrvLcLwkfJ8slL36nN0bi+zp+dei7XlKt/DzswCM/50m+f1eImNdY9soze34R c7OM1xGo18g/tk5W2sytnGuWTUGOSQ5268C7bOI3e/0lusk3jptSyDIYZBFOTW6zjuzwMeInvfHnB j+xxBuQA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRa0g-0000000AuBl-0pkz; Thu, 12 Nov 2026 18:58:58 +0000 Received: from nbd.name ([46.4.11.11]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRa0L-0000000Au3i-0sD4; Thu, 12 Nov 2026 18:58:39 +0000 Received: from [2a04:4540:1403:f2fc:83ce:6656:246:c906] (helo=bertha10..) by ds12 with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1xRa0A-002Xe4-2W; Thu, 12 Nov 2026 19:58:26 +0100 From: John Crispin To: Stefan Roese , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Philipp Zabel Cc: Christian Marangi , devicetree@vger.kernel.org, lei.dong@airoha.com, Linqi.zhang@airoha.com, linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, Rajeev.kumar@airoha.com, upstream@airoha.com, Weifeng.xu@airoha.com, zhengping.zhang@airoha.com Subject: [PATCH v2 0/3] i2c: mt7621: add Airoha AN7589 support Date: Thu, 12 Nov 2026 19:58:17 +0100 Message-Id: <20261112185820.1315718-1-john@phrozen.org> X-Mailer: git-send-email 2.34.1 X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261112_105837_383226_15693E36 X-CRM114-Status: UNSURE ( 8.42 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-11.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 The Airoha AN7589 carries the MT7621 I2C controller with a second control register that holds a 16 bit clock divider. It runs without SCL stretching. Patch 1 resets the controller with reset_control_assert() and reset_control_deassert() instead of device_reset(), as the EN7581 and AN7589 reset controller has no .reset operation. Patch 2 adds the compatible, with mediatek,mt7621-i2c as the fallback. Patch 3 describes the variants as match data and uses the wider divider for bus rates down to about 3 kHz. The series applies to next-20261105 and has no dependencies. Changes in v2: - Add patch 1. It replaces "clk: en7523: add a reset operation" from the clk series, as Philipp suggested. - Patch 2: add mediatek,mt7621-i2c as the fallback compatible (Conor). - Patch 3: the extended divider supports bus rates down to about 3 kHz. Set it up before the controller is enabled. - Link to v1: https://lore.kernel.org/r/20261111093941.691801-1-john@phrozen.org John Crispin (3): i2c: mt7621: assert and deassert the reset line dt-bindings: i2c: mt7621: add Airoha AN7589 i2c: mt7621: add support for Airoha AN7589 .../bindings/i2c/mediatek,mt7621-i2c.yaml | 10 ++- drivers/i2c/busses/i2c-mt7621.c | 69 ++++++++++++++++--- 2 files changed, 69 insertions(+), 10 deletions(-) base-commit: ddfe51b0a0f5dc9e415cc2c8ad8db17532dd426b -- 2.34.1