From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1F7453932C5; Mon, 13 Apr 2026 07:14:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776064460; cv=none; b=UGCdTEKFtDR7Pjp76JPPZM2smGdOJL+N2oD2Rd/KbY/JyyIED/Wndt+DHNXam4tLHH9aSwXehYO9nwClFLBb+gKX3rrE/qsb0R/pqGra3Co5BdjYK4DjVxVqjxRB0HawvqdCPLzkZhKSj0BbsMIcTwOGAltXomTFUrOBkHLNIkI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776064460; c=relaxed/simple; bh=vuwRlkZYLIxxUCOLpgylQQIFaKEpVpnkXfetnfrcOnE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uYGJBlM7fySnd/SJ12g3EJ6SWqoS2RVNY+xYSLfltrh+nRvLTX45gX2b/RyPz5z/7TxK3Co9bQdZlbmZwz+QFKj7LF8MZfjU/Wnspsl75gyh6CdyHBDYlFlfJdRGHboGhGvMEzggoRwMUK4c96lmko2cjz2XLw7W26dt74woz0E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=bINiSEyW; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="bINiSEyW" X-UUID: 5f3eb93a370811f1ae70033691e9ac7d-20260413 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:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=xfFRo0UHQusuMDmGKevH0yFYeubiKUgkDDCMUWqjD1Y=; b=bINiSEyWMudMogYpEeJHY9RajiFIFstwyJMpLFkiDDBafhPJ8jpXAjnTr6MMicU/oXl3yAnkLmtRmmV8DCwLVyqIiJzCSL9ZnQ/ny7wu5yycwMaybldajO0j8sGWeUb68vlT+GNiCZ1PnzEFOhuwT9HJnPVzCksf1P8r3khA7+o=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:c10eb28e-2a09-4397-a958-80539d315422,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:e7bac3a,CLOUDID:8cd5cb24-cb5c-4236-a89a-9a7fb20c9bc4,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:81|82|102|836|865|888|898,TC:-5,Cont ent:0|15|50,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: 5f3eb93a370811f1ae70033691e9ac7d-20260413 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 337511746; Mon, 13 Apr 2026 15:14:12 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Mon, 13 Apr 2026 15:14:10 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Mon, 13 Apr 2026 15:14:10 +0800 From: Jian Yang To: Matthias Brugger , AngeloGioacchino Del Regno , Ryder Lee , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas CC: , , , , , , Subject: [PATCH 2/2] PCI: mediatek-gen3: Add a shutdown callback to cotnrol PERST# signal Date: Mon, 13 Apr 2026 15:13:56 +0800 Message-ID: <20260413071401.1151-3-jian.yang@mediatek.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20260413071401.1151-1-jian.yang@mediatek.com> References: <20260413071401.1151-1-jian.yang@mediatek.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Add a shutdown callback to control the timing of PERST# and power during system shutdown, ensuring that the PERST#, as required by the PCIe CEM specification, is active before the power on connector is removed. Signed-off-by: Jian Yang --- drivers/pci/controller/pcie-mediatek-gen3.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index 58ba1aa35a22..4915979968b9 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -1285,6 +1285,14 @@ static void mtk_pcie_remove(struct platform_device *pdev) mtk_pcie_irq_teardown(pcie); } +static void mtk_pcie_shutdown(struct platform_device *pdev) +{ + struct mtk_gen3_pcie *pcie = platform_get_drvdata(pdev); + + mtk_pcie_devices_power_down(pcie); + mtk_pcie_power_down(pcie); +} + static void mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie) { int i; @@ -1423,6 +1431,7 @@ MODULE_DEVICE_TABLE(of, mtk_pcie_of_match); static struct platform_driver mtk_pcie_driver = { .probe = mtk_pcie_probe, .remove = mtk_pcie_remove, + .shutdown = mtk_pcie_shutdown, .driver = { .name = "mtk-pcie-gen3", .of_match_table = mtk_pcie_of_match, -- 2.45.2