From patchwork Fri Jun 5 21:26:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Quinlan X-Patchwork-Id: 11590499 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0C87E60D for ; Fri, 5 Jun 2020 21:27:32 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DDB8F2065C for ; Fri, 5 Jun 2020 21:27:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="p0L05auk"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="bMIJbJyb" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DDB8F2065C Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=broadcom.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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=6RVgKRXMbnlQ89TIn3l6poyFk4yd8+CJLCQ3QZv5mS4=; b=p0L05auk1sCoBWZiWpoOfeZLTC GK79tfm/HfyX+PJGjdk4/rCu0MuBYYhfp1Ah91WhWkR5D/DRXGxi1k7Po7QJU4XUxGjUB06xLNn34 6q2zRvZMNpFboN7iN65/qJEajhKeiM7uUtSQkK41Uv/csHo9XGX3rmOhFn3oVahp0mD3zfHJgY/F1 Kvp/aajYFjGwxy8nj6V7vw15b7r6zDuuifjbhVnKnuYMks2qMKqFzq3UdmgZIeVQILEIV6/EWcBZi 5PMUn0aBbsjYEaIsqqlkR+1PVfzXmrE0Q5D+GfvLWlqtgmwZJzTy0w1/3/pPTWlyJ/ASlPK6W4/Ng x4zRPKcQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jhJs8-0002lF-9X; Fri, 05 Jun 2020 21:27:28 +0000 Received: from rnd-relay.smtp.broadcom.com ([192.19.229.170]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jhJs5-0002jA-3j; Fri, 05 Jun 2020 21:27:26 +0000 Received: from mail-irv-17.broadcom.com (mail-irv-17.lvn.broadcom.net [10.75.242.48]) by rnd-relay.smtp.broadcom.com (Postfix) with ESMTP id 081E330D7C5; Fri, 5 Jun 2020 14:27:23 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 rnd-relay.smtp.broadcom.com 081E330D7C5 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1591392443; bh=dbYd+PsdUAPE42K+29fEsyx7D8npbEvEeKGqpcr24Ac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bMIJbJybnHAsYM7tIaeuhD6TMSwMEYBXY+f5UcJamWMBGVmDeJ6Fgsk3xbatIDjwo a+C5KqwjtAna9GViCGkGtC5S+xj82p1YGH9Jwyj7jvtr+H/JGsmDTcQGN2fvpxHKqg n3O04igo4LrArbKInAT2oDuS81yLEw1KlN3zpKNI= Received: from stbsrv-and-01.and.broadcom.net (stbsrv-and-01.and.broadcom.net [10.28.16.211]) by mail-irv-17.broadcom.com (Postfix) with ESMTP id 7842614008C; Fri, 5 Jun 2020 14:27:21 -0700 (PDT) From: Jim Quinlan To: linux-pci@vger.kernel.org, Christoph Hellwig , Nicolas Saenz Julienne , bcm-kernel-feedback-list@broadcom.com, james.quinlan@broadcom.com Subject: [PATCH v4 05/12] PCI: brcmstb: Add suspend and resume pm_ops Date: Fri, 5 Jun 2020 17:26:45 -0400 Message-Id: <20200605212706.7361-6-james.quinlan@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200605212706.7361-1-james.quinlan@broadcom.com> References: <20200605212706.7361-1-james.quinlan@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200605_142725_208303_F913D2DB X-CRM114-Status: UNSURE ( 9.08 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [192.19.229.170 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Lorenzo Pieralisi , open list , Florian Fainelli , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" , Jim Quinlan , Bjorn Helgaas , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Jim Quinlan Broadcom Set-top (BrcmSTB) boards typically support S2, S3, and S5 suspend and resume. Now the PCIe driver may do so as well. Signed-off-by: Jim Quinlan Acked-by: Florian Fainelli --- drivers/pci/controller/pcie-brcmstb.c | 48 +++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 7c707e483181..69d49d675b4a 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -979,6 +979,48 @@ static void brcm_pcie_turn_off(struct brcm_pcie *pcie) brcm_pcie_bridge_sw_init_set(pcie, 1); } +static int brcm_pcie_suspend(struct device *dev) +{ + struct brcm_pcie *pcie = dev_get_drvdata(dev); + + brcm_pcie_turn_off(pcie); + clk_disable_unprepare(pcie->clk); + + return 0; +} + +static int brcm_pcie_resume(struct device *dev) +{ + struct brcm_pcie *pcie = dev_get_drvdata(dev); + void __iomem *base; + u32 tmp; + int ret; + + base = pcie->base; + clk_prepare_enable(pcie->clk); + + /* Take bridge out of reset so we can access the SERDES reg */ + brcm_pcie_bridge_sw_init_set(pcie, 0); + + /* SERDES_IDDQ = 0 */ + tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); + u32p_replace_bits(&tmp, 0, + PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK); + writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); + + /* wait for serdes to be stable */ + udelay(100); + + ret = brcm_pcie_setup(pcie); + if (ret) + return ret; + + if (pcie->msi) + brcm_msi_set_regs(pcie->msi); + + return 0; +} + static void __brcm_pcie_remove(struct brcm_pcie *pcie) { brcm_msi_remove(pcie); @@ -1095,12 +1137,18 @@ static int brcm_pcie_probe(struct platform_device *pdev) MODULE_DEVICE_TABLE(of, brcm_pcie_match); +static const struct dev_pm_ops brcm_pcie_pm_ops = { + .suspend_noirq = brcm_pcie_suspend, + .resume_noirq = brcm_pcie_resume, +}; + static struct platform_driver brcm_pcie_driver = { .probe = brcm_pcie_probe, .remove = brcm_pcie_remove, .driver = { .name = "brcm-pcie", .of_match_table = brcm_pcie_match, + .pm = &brcm_pcie_pm_ops, }, }; module_platform_driver(brcm_pcie_driver);