From patchwork Wed Aug 16 07:52:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeffy Chen X-Patchwork-Id: 9903213 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 98806600CA for ; Wed, 16 Aug 2017 07:53:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 89894284E3 for ; Wed, 16 Aug 2017 07:53:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E8BA2899A; Wed, 16 Aug 2017 07:53:55 +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=-2.6 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_LOW autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 302B3284E3 for ; Wed, 16 Aug 2017 07:53:55 +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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=lxr+NXguqWbOC4GikALSqJ+1Qoy8Ft/s9203xDDNQ58=; b=Gkuoak02/l/xWWqATMlFUXZfAR P9ga9G7gnp+KMjfm0oZcuTWiAQRU/2serPUDZ057GpqRT//f3FYoW1nUVU7Xn+AFbdsxb9DOv6e4J tWAc/D3ozGSF+Y/JY6fMbhLih5nU1ZfHMuZFnbwh1e7EyNzN4GLlDSrMcfr62Q+udtuTvgy8Pr2jv VLpAuknSzChM/Oq/4vrckb3EW3FFNmNagcwOOTsrX5QYKaKu3zkGRkLFS4Qc5QBvYO3aX56eeOCfe zR8mdfQdcw6VXyMBSjtsk49cdRmycvnLa4OrLLATexeRBltotdQPvQw1HkgsDnnrpIb+oiryFJf+0 mk/xN2qw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dht9B-0002RN-MV; Wed, 16 Aug 2017 07:53:49 +0000 Received: from regular1.263xmail.com ([211.150.99.138]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dht8d-0001rT-4X; Wed, 16 Aug 2017 07:53:17 +0000 Received: from jeffy.chen?rock-chips.com (unknown [192.168.167.110]) by regular1.263xmail.com (Postfix) with ESMTP id 919F17A15; Wed, 16 Aug 2017 15:52:50 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTPA id 7E5193BC; Wed, 16 Aug 2017 15:52:46 +0800 (CST) X-RL-SENDER: jeffy.chen@rock-chips.com X-FST-TO: linux-kernel@vger.kernel.org X-SENDER-IP: 103.29.142.67 X-LOGIN-NAME: jeffy.chen@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-SENDER: cjf@rock-chips.com X-DNS-TYPE: 0 Received: from localhost (unknown [103.29.142.67]) by smtp.263.net (Postfix) whith ESMTP id 42400BX9BG; Wed, 16 Aug 2017 15:52:51 +0800 (CST) From: Jeffy Chen To: linux-kernel@vger.kernel.org, bhelgaas@google.com Subject: [RFC PATCH 1/3] PCI: rockchip: Add support for pcie wake irq Date: Wed, 16 Aug 2017 15:52:22 +0800 Message-Id: <20170816075224.31734-2-jeffy.chen@rock-chips.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170816075224.31734-1-jeffy.chen@rock-chips.com> References: <20170816075224.31734-1-jeffy.chen@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170816_005315_742240_5B33CB1C X-CRM114-Status: UNSURE ( 9.71 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jeffy Chen , Heiko Stuebner , linux-pci@vger.kernel.org, shawn.lin@rock-chips.com, briannorris@chromium.org, dianders@chromium.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for PCIE_WAKE pin in rockchip pcie driver. Signed-off-by: Jeffy Chen --- drivers/pci/host/pcie-rockchip.c | 58 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index 7bb9870f6d8c..f969a6d3cd85 100644 --- a/drivers/pci/host/pcie-rockchip.c +++ b/drivers/pci/host/pcie-rockchip.c @@ -38,6 +38,7 @@ #include #include #include +#include /* * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16 @@ -226,6 +227,8 @@ struct rockchip_pcie { struct regulator *vpcie1v8; /* 1.8V power supply */ struct regulator *vpcie0v9; /* 0.9V power supply */ struct gpio_desc *ep_gpio; + int wake_irq; + bool wake_by_pcie; u32 lanes; u8 root_bus_nr; int link_gen; @@ -853,6 +856,20 @@ static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc) chained_irq_exit(chip, desc); } +static irqreturn_t rockchip_pcie_wake_irq_handler(int irq, void *arg) +{ + struct rockchip_pcie *rockchip = arg; + + rockchip->wake_by_pcie = true; + + disable_irq_nosync(rockchip->wake_irq); + disable_irq_wake(rockchip->wake_irq); + + pm_wakeup_event(rockchip->dev, 0); + pm_system_wakeup(); + + return IRQ_HANDLED; +} /** * rockchip_pcie_parse_dt - Parse Device Tree @@ -868,6 +885,7 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) struct resource *regs; int irq; int err; + bool wakeup = 0; regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, @@ -1018,6 +1036,21 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) return err; } + rockchip->wake_irq = platform_get_irq_byname(pdev, "wake"); + if (rockchip->wake_irq >= 0) { + err = devm_request_irq(dev, rockchip->wake_irq, + rockchip_pcie_wake_irq_handler, + 0, "pcie-wake", rockchip); + if (err) { + dev_err(dev, "failed to request PCIe wake IRQ\n"); + return err; + } + + disable_irq(rockchip->wake_irq); + wakeup = device_property_read_bool(dev, "wakeup-source"); + } + device_init_wakeup(dev, wakeup); + rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3"); if (IS_ERR(rockchip->vpcie3v3)) { if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER) @@ -1270,6 +1303,30 @@ static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip) return 0; } +static int __maybe_unused rockchip_pcie_suspend(struct device *dev) +{ + struct rockchip_pcie *rockchip = dev_get_drvdata(dev); + + rockchip->wake_by_pcie = false; + + if (device_may_wakeup(dev)) { + enable_irq_wake(rockchip->wake_irq); + enable_irq(rockchip->wake_irq); + } + return 0; +} + +static int __maybe_unused rockchip_pcie_resume(struct device *dev) +{ + struct rockchip_pcie *rockchip = dev_get_drvdata(dev); + + if (device_may_wakeup(dev) && !rockchip->wake_by_pcie) { + disable_irq(rockchip->wake_irq); + disable_irq_wake(rockchip->wake_irq); + } + return 0; +} + static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev) { struct rockchip_pcie *rockchip = dev_get_drvdata(dev); @@ -1548,6 +1605,7 @@ static int rockchip_pcie_remove(struct platform_device *pdev) } static const struct dev_pm_ops rockchip_pcie_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend, rockchip_pcie_resume) SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq, rockchip_pcie_resume_noirq) };