From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E9737FF6E8C for ; Wed, 18 Mar 2026 08:42:36 +0000 (UTC) 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-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=ZSzv/o3IHhli9mGR2+OsPwYiHpuhmCGiETm1UfYWuuI=; b=p1qNFMrCUJuFPoMHAcwd0b+4BM MuB3vQ0H2W4cY6syp9ymYq1dta2Y5kxFvNChmRR3Cv5jaFTHZcvLCm0FGER5DOoO0nfcKcODzrHEV 1ZW+Z6NqsLA7PsY9kh8BOY0U2HNjtOO76md0YEnGVeNhw+UPExehoBHZJDPvxwZ654DvSalVdRM51 L0/nh6XFCO64mBHcBPyPjcK82LMy5AgTQn2PpJDJnfMbHleIzfXutfHYjIXjIaKzYaeBumocEozh8 kMqhfA59bEZYwcwfBuDgC4wP6y6IKB3BEF13orRJyVhQm5PS5cax1NQZYNxjd64jfiC6hNvYOzfi6 h1U/wLaA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2mU1-00000008485-2xUX; Wed, 18 Mar 2026 08:42:30 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2mTz-00000008477-0fwg; Wed, 18 Mar 2026 08:42:28 +0000 X-UUID: 60d2a4c622a611f1a6de359d7043e138-20260318 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=ZSzv/o3IHhli9mGR2+OsPwYiHpuhmCGiETm1UfYWuuI=; b=tBywKN3u1G/ya7u7NhO0JzqS+GRymu1zzTEShI2kVKvj7v82Qr2tKRc9zaP6KFSSlPmNR9koSS/A0QSQOxvR14i4RpZ5nByq0xoqUPDmvU8ian5rBZasxI4LHUC3t9y08P4pJFjbS6h+D8FMWNNfCkh1g0vMbnEHQCmGZGTIlDo=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:cf02f02d-a32c-437f-a839-47e65944ff80,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:e7bac3a,CLOUDID:c4d7a24c-9183-487b-8624-e74f2dd98990,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102|836|888|898,TC:-5,Content:0|15|5 0,EDM:-3,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS:nil,BEC:-1,COL:0,OSI:0,OSA :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 X-UUID: 60d2a4c622a611f1a6de359d7043e138-20260318 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 327203729; Wed, 18 Mar 2026 01:42:20 -0700 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by MTKMBS14N2.mediatek.inc (172.21.101.76) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Wed, 18 Mar 2026 16:42:18 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Wed, 18 Mar 2026 16:42:18 +0800 From: adlavinitha reddy To: Qii Wang , Andi Shyti , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , adlavinitha reddy Subject: [v1,PATCH 0/1] i2c: mediatek: add bus regulator control for power saving Date: Wed, 18 Mar 2026 16:42:05 +0800 Message-ID: <20260318084216.4124272-1-adlavinitha.reddy@mediatek.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260318_014227_211029_6ABC61C6 X-CRM114-Status: UNSURE ( 9.74 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch adds conditional bus regulator enable/disable support in mtk_i2c_transfer() to allow I2C bus power gating on platforms that provide a vbus-supply in the device tree. The implementation: - Enables bus_regulator before clk_bulk_enable() if vbus-supply is defined - Disables bus_regulator after clk_bulk_disable() - Only activates when vbus-supply is provided in device tree - Has no impact on platforms without vbus-supply defined This approach provides power savings for platforms with an extra I2C bus regulator, while avoiding runtime PM complexity. Based on linux-next, tag: next-20260305 adlavinitha reddy (1): i2c: mediatek: add bus regulator control for power saving drivers/i2c/busses/i2c-mt65xx.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) -- 2.45.2