From patchwork Wed Jun 27 09:21:37 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Honghui Zhang X-Patchwork-Id: 10491045 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A311960375 for ; Wed, 27 Jun 2018 09:23:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 98A451FF0B for ; Wed, 27 Jun 2018 09:23:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8BE8928606; Wed, 27 Jun 2018 09:23:03 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1D3441FF0B for ; Wed, 27 Jun 2018 09:23:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=r4V69PmAhs3Qh9nj1n9syGp6jSVjsiYFIAcdDvgxipE=; b=dQ9Pl4IzY791eH n5/T5UIJ/9J07ITrPXlRYynNY6BVX3kxdkDxmHS/Y3mRhAizECeHHnf7VgF9JTl621DR7M4runmlg Aq1F8svyN+XYbuL6FIBT9Gsa1hZMk0enMsJsjWalJUm2LC/fDbyfCaZ6v8FSA6jVq6R8Od6stgK9P uEt4VbZ7bIPGcOtUtMENWyFGe1aappQVqJt3aKSQo8WHZKdUK9fMoESH98bKnXVKILFl0d82nAFev KKxi3attk+Op1oUGLeXsEHTa8FzS6gelut3dFV7saJ3hpBMg0KyzuyvFZ3Iifkte443sT1OZIXMYe iFntpaU0ZVWNtXXIoakw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fY6fD-0002cX-Tb for patchwork-linux-mediatek@patchwork.kernel.org; Wed, 27 Jun 2018 09:22:59 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fY6eO-0001xO-JZ; Wed, 27 Jun 2018 09:22:14 +0000 X-UUID: a7d192c42ede4af89f3fc1b873330ad7-20180627 Received: from mtkcas08.mediatek.inc [(172.21.101.126)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 2034429156; Wed, 27 Jun 2018 17:21:53 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Wed, 27 Jun 2018 17:21:52 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Wed, 27 Jun 2018 17:21:50 +0800 From: To: , , , , , , , , , , , Subject: [PATCH 3/4] PCI: mediatek: Add system pm support for MT2712 and MT7622 Date: Wed, 27 Jun 2018 17:21:37 +0800 Message-ID: <1530091298-28120-4-git-send-email-honghui.zhang@mediatek.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1530091298-28120-1-git-send-email-honghui.zhang@mediatek.com> References: <1530091298-28120-1-git-send-email-honghui.zhang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180627_022209_225290_1FE52F50 X-CRM114-Status: GOOD ( 13.21 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: youlin.pei@mediatek.com, hongkun.cao@mediatek.com, sean.wang@mediatek.com, honghui.zhang@mediatek.com, yong.wu@mediatek.com Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Honghui Zhang The MTCMOS of PCIe Host for MT2712 and MT7622 will be off when system suspend, and all the internal control register will be reset after system resume. The PCIe link should be re-established and the related control register values should be re-set after system resume. Signed-off-by: Honghui Zhang Reviewed-by: Ryder Lee --- drivers/pci/controller/pcie-mediatek.c | 68 ++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index 17bf99b..cac01ab 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -134,12 +134,14 @@ struct mtk_pcie_port; /** * struct mtk_pcie_soc - differentiate between host generations * @need_fix_class_id: whether this host's class ID needed to be fixed or not + * @pm_support: whether the host's MTCMOS will be off when suspend * @ops: pointer to configuration access functions * @startup: pointer to controller setting functions * @setup_irq: pointer to initialize IRQ functions */ struct mtk_pcie_soc { bool need_fix_class_id; + bool pm_support; struct pci_ops *ops; int (*startup)(struct mtk_pcie_port *port); int (*setup_irq)(struct mtk_pcie_port *port, struct device_node *node); @@ -1195,12 +1197,76 @@ static int mtk_pcie_probe(struct platform_device *pdev) return err; } +#ifdef CONFIG_PM_SLEEP +static int mtk_pcie_suspend_noirq(struct device *dev) +{ + struct mtk_pcie *pcie = dev_get_drvdata(dev); + const struct mtk_pcie_soc *soc = pcie->soc; + struct mtk_pcie_port *port; + + if (!soc->pm_support) + return 0; + + 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); + } + + mtk_pcie_subsys_powerdown(pcie); + + return 0; +} + +static int mtk_pcie_resume_noirq(struct device *dev) +{ + struct mtk_pcie *pcie = dev_get_drvdata(dev); + const struct mtk_pcie_soc *soc = pcie->soc; + struct mtk_pcie_port *port; + + if (!soc->pm_support) + return 0; + + if (list_empty(&pcie->ports)) + return 0; + + if (dev->pm_domain) { + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + } + + clk_prepare_enable(pcie->free_ck); + + list_for_each_entry(port, &pcie->ports, list) + mtk_pcie_enable_port(port); + + if (list_empty(&pcie->ports)) + mtk_pcie_subsys_powerdown(pcie); + + return 0; +} +#endif + +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, }; static const struct mtk_pcie_soc mtk_pcie_soc_mt2712 = { + .pm_support = true, .ops = &mtk_pcie_ops_v2, .startup = mtk_pcie_startup_port_v2, .setup_irq = mtk_pcie_setup_irq, @@ -1208,6 +1274,7 @@ static const struct mtk_pcie_soc mtk_pcie_soc_mt2712 = { static const struct mtk_pcie_soc mtk_pcie_soc_mt7622 = { .need_fix_class_id = true, + .pm_support = true, .ops = &mtk_pcie_ops_v2, .startup = mtk_pcie_startup_port_v2, .setup_irq = mtk_pcie_setup_irq, @@ -1227,6 +1294,7 @@ 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);