{"id":2212513,"url":"http://patchwork.ozlabs.org/api/1.2/covers/2212513/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-i2c/cover/20260318084621.4127757-1-adlavinitha.reddy@mediatek.com/","project":{"id":35,"url":"http://patchwork.ozlabs.org/api/1.2/projects/35/?format=json","name":"Linux I2C development","link_name":"linux-i2c","list_id":"linux-i2c.vger.kernel.org","list_email":"linux-i2c@vger.kernel.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260318084621.4127757-1-adlavinitha.reddy@mediatek.com>","list_archive_url":null,"date":"2026-03-18T08:46:15","name":"[v1,0/1] i2c: mediatek: add bus regulator control for power saving","submitter":{"id":92899,"url":"http://patchwork.ozlabs.org/api/1.2/people/92899/?format=json","name":"adlavinitha reddy","email":"adlavinitha.reddy@mediatek.com"},"mbox":"http://patchwork.ozlabs.org/project/linux-i2c/cover/20260318084621.4127757-1-adlavinitha.reddy@mediatek.com/mbox/","series":[{"id":496419,"url":"http://patchwork.ozlabs.org/api/1.2/series/496419/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-i2c/list/?series=496419","date":"2026-03-18T08:46:15","name":"i2c: mediatek: add bus regulator control for power saving","version":1,"mbox":"http://patchwork.ozlabs.org/series/496419/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2212513/comments/","headers":{"Return-Path":"\n <linux-i2c+bounces-16564-incoming=patchwork.ozlabs.org@vger.kernel.org>","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=mediatek.com header.i=@mediatek.com header.a=rsa-sha256\n header.s=dk header.b=gAEamYto;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c09:e001:a7::12fc:5321; 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Wed, 18 Mar 2026 16:46:23 +0800"],"ARC-Seal":"i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1773823591; cv=none;\n b=JV/o5Iod6CP3NI8ESmvxgWmeKXFDjqXVMx80Gv5E7oB3oE2H+aX7AdWFu8JGqGdnx+yskTUxJQ0NQhP4gpXNA5Fb94PjvLkmafXcXH+z8lAN/FC7u72HY7kNDTMxOkmueb/toZ2DDl8ZG1BAuYteKtHpoFH6m1IG6P+lztlYhiw=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1773823591; c=relaxed/simple;\n\tbh=9byYKUji0cE7A/nKmZVXfVChA0vx+cBsLfTFs/W3+O8=;\n\th=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type;\n b=B/p0HV4eF5E2IQ+cfuPcS01FhoRaXmOb08bpu3JLLgka1y0IxdSw8c6PGxMybCqTcO7xBYS6HsuKn5GJ5Y8cNz2+B56UVHe0DaJWpk1D/ys7ZD0ST+P08tDGKPwYclQvQGbUxy+5xMpG+FsbD6vi8pyIBjmr96P95EcLyPgcqhk=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=quarantine dis=none) header.from=mediatek.com;\n spf=pass smtp.mailfrom=mediatek.com;\n dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com\n header.b=gAEamYto; arc=none smtp.client-ip=60.244.123.138","X-UUID":["f22d444e22a611f1a02d4725871ece0b-20260318","f22d444e22a611f1a02d4725871ece0b-20260318"],"DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n d=mediatek.com; s=dk;\n\th=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From;\n bh=ZSzv/o3IHhli9mGR2+OsPwYiHpuhmCGiETm1UfYWuuI=;\n\tb=gAEamYto2n7vPERXQDRlqsWFU+ali0IJSPILdHd3HRXXn5vB4hUTKQDvBCGjtjVAD3aNv+MTEUc290cLVqeLNnhmtY+ACbzT1un44AZIRupD8IKzDQGO1Z8t5cVvGp6JteyudcbV7SPAK9ckTfaaRAoljrTHF7BK+r/AjYfhudY=;","X-CID-P-RULE":"Release_Ham","X-CID-O-INFO":"VERSION:1.3.12,REQID:de17a95c-5253-45ed-96ad-c615dfe46e1a,IP:0,U\n\tRL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION:\n\trelease,TS:0","X-CID-META":"VersionHash:e7bac3a,CLOUDID:ad61d716-aa6b-4b2e-be76-373ef1a42b04,B\n\tulkID:nil,BulkQuantity:0,Recheck:0,SF:102|836|888|898,TC:-5,Content:0|15|5\n\t0,EDM:-3,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS:nil,BEC:-1,COL:0,OSI:0,OSA\n\t:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0","X-CID-BVR":"2,SSN|SDN","X-CID-BAS":"2,SSN|SDN,0,_","X-CID-FACTOR":"TF_CID_SPAM_SNR","X-CID-RHF":"D41D8CD98F00B204E9800998ECF8427E","From":"adlavinitha reddy <adlavinitha.reddy@mediatek.com>","To":"Qii Wang <qii.wang@mediatek.com>, Andi Shyti <andi.shyti@kernel.org>,\n\tMatthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno\n\t<angelogioacchino.delregno@collabora.com>","CC":"<linux-i2c@vger.kernel.org>, <linux-kernel@vger.kernel.org>,\n\t<linux-arm-kernel@lists.infradead.org>, <linux-mediatek@lists.infradead.org>,\n\t<Project_Global_Chrome_Upstream_Group@mediatek.com>, adlavinitha reddy\n\t<adlavinitha.reddy@mediatek.com>","Subject":"[v1,PATCH 0/1] i2c: mediatek: add bus regulator control for power\n saving","Date":"Wed, 18 Mar 2026 16:46:15 +0800","Message-ID":"<20260318084621.4127757-1-adlavinitha.reddy@mediatek.com>","X-Mailer":"git-send-email 2.45.2","Precedence":"bulk","X-Mailing-List":"linux-i2c@vger.kernel.org","List-Id":"<linux-i2c.vger.kernel.org>","List-Subscribe":"<mailto:linux-i2c+subscribe@vger.kernel.org>","List-Unsubscribe":"<mailto:linux-i2c+unsubscribe@vger.kernel.org>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Content-Type":"text/plain","X-MTK":"N"},"content":"This patch adds conditional bus regulator enable/disable support in\nmtk_i2c_transfer() to allow I2C bus power gating on platforms that\nprovide a vbus-supply in the device tree.\n\nThe implementation:\n- Enables bus_regulator before clk_bulk_enable() if vbus-supply is defined\n- Disables bus_regulator after clk_bulk_disable()\n- Only activates when vbus-supply is provided in device tree\n- Has no impact on platforms without vbus-supply defined\n\nThis approach provides power savings for platforms with an extra I2C bus\nregulator, while avoiding runtime PM complexity.\n\nBased on linux-next, tag: next-20260305\n\nadlavinitha reddy (1):\n  i2c: mediatek: add bus regulator control for power saving\n\n drivers/i2c/busses/i2c-mt65xx.c | 13 ++++++++++++-\n 1 file changed, 12 insertions(+), 1 deletion(-)\n\n--\n2.45.2"}