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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" }