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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F8E4C6787E for ; Mon, 8 Oct 2018 03:25:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E1C82077C for ; Mon, 8 Oct 2018 03:25:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4E1C82077C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727181AbeJHKfN (ORCPT ); Mon, 8 Oct 2018 06:35:13 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:46639 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726678AbeJHKeo (ORCPT ); Mon, 8 Oct 2018 06:34:44 -0400 X-UUID: 63959428c9a24812822603f90cebac27-20181008 X-UUID: 63959428c9a24812822603f90cebac27-20181008 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 952619971; Mon, 08 Oct 2018 11:25:07 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 8 Oct 2018 11:25:05 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 8 Oct 2018 11:25:04 +0800 From: To: , , , , , , CC: , , , , , , , , , Subject: [PATCH v6 7/9] PCI: mediatek: Add system pm support for MT2712 and MT7622 Date: Mon, 8 Oct 2018 11:24:46 +0800 Message-ID: <1538969088-7136-8-git-send-email-honghui.zhang@mediatek.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1538969088-7136-1-git-send-email-honghui.zhang@mediatek.com> References: <1538969088-7136-1-git-send-email-honghui.zhang@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Honghui Zhang In order to reduce the PCIe power consuming while system suspend, the physical layer should be gated. And the PCIe link should be re-established and the related control register values should be re-initialized after system resume. Register suspend_noirq & resume_noirq callback functions to allow PCIe to come up after resume from RAM. Signed-off-by: Honghui Zhang Acked-by: Ryder Lee --- drivers/pci/controller/pcie-mediatek.c | 50 ++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index d3f4694..42cf2a4 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -1168,6 +1168,55 @@ static int mtk_pcie_probe(struct platform_device *pdev) return err; } +static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) +{ + struct mtk_pcie *pcie = dev_get_drvdata(dev); + struct mtk_pcie_port *port; + + if (list_empty(&pcie->ports)) + return 0; + + list_for_each_entry(port, &pcie->ports, list) { + clk_disable_unprepare(port->pipe_ck); + clk_disable_unprepare(port->obff_ck); + clk_disable_unprepare(port->axi_ck); + clk_disable_unprepare(port->aux_ck); + clk_disable_unprepare(port->ahb_ck); + clk_disable_unprepare(port->sys_ck); + phy_power_off(port->phy); + phy_exit(port->phy); + } + + clk_disable_unprepare(pcie->free_ck); + + return 0; +} + +static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) +{ + struct mtk_pcie *pcie = dev_get_drvdata(dev); + struct mtk_pcie_port *port, *tmp; + + if (list_empty(&pcie->ports)) + return 0; + + clk_prepare_enable(pcie->free_ck); + + list_for_each_entry_safe(port, tmp, &pcie->ports, list) + mtk_pcie_enable_port(port); + + /* In case of EP was removed while system suspend. */ + if (list_empty(&pcie->ports)) + clk_disable_unprepare(pcie->free_ck); + + return 0; +} + +static const struct dev_pm_ops mtk_pcie_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, + mtk_pcie_resume_noirq) +}; + static const struct mtk_pcie_soc mtk_pcie_soc_v1 = { .ops = &mtk_pcie_ops, .startup = mtk_pcie_startup_port, @@ -1200,6 +1249,7 @@ static struct platform_driver mtk_pcie_driver = { .name = "mtk-pcie", .of_match_table = mtk_pcie_ids, .suppress_bind_attrs = true, + .pm = &mtk_pcie_pm_ops, }, }; builtin_platform_driver(mtk_pcie_driver); -- 2.6.4