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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 2A2D5C7618B for ; Wed, 24 Jul 2019 07:45:53 +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 EBB8C2190F for ; Wed, 24 Jul 2019 07:45:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="XctTBdq0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EBB8C2190F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.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=pionG23GTQn8WAPiE96rEEBWbkExXfd5o7SjYLlYcPI=; b=XctTBdq0KJ4yqWpHT0Wm+VxDuQ 6NXVTIRfumm9If3KcdySKeXJ0oGYUzjTcwkAEnzuxWTKD7KlaGOkabXTf8T3I5m8nJB5YZxMd3a6C HoN/ShYDErqo2IXk3bsifzGSKIuaQCfLOlbjxrdldC1MAymT1f1DEmT8JshO8x+WlmnVUdAX1EC+A YQFW3vPxirVd22WdH5BYgPbhu6DtcktAUiQuBPgfMP4DjGZupz3ZL3nkM+AZm7O/qyOJ/m5D2L0v/ IM3PFq/SQUHDPiTDak/uF6PNkLx0iA8MawCJ4332K9xLRgRps4Tni4pKhRrzuzO1nRR7xZlOTypxe 47DR7PRw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hqBy4-0000L0-DU; Wed, 24 Jul 2019 07:45:44 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hqBxe-0008Uo-R9 for linux-arm-kernel@lists.infradead.org; Wed, 24 Jul 2019 07:45:20 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 4B590200205; Wed, 24 Jul 2019 09:45:15 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 025F6200217; Wed, 24 Jul 2019 09:45:08 +0200 (CEST) Received: from localhost.localdomain (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 352D240309; Wed, 24 Jul 2019 15:44:59 +0800 (SGT) From: Ran Wang To: Li Yang , Rob Herring , Mark Rutland , Pavel Machek Subject: [PATCH v5 3/3] soc: fsl: add RCPM driver Date: Wed, 24 Jul 2019 15:47:22 +0800 Message-Id: <20190724074722.12270-3-ran.wang_1@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190724074722.12270-1-ran.wang_1@nxp.com> References: <20190724074722.12270-1-ran.wang_1@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190724_004519_160629_15678544 X-CRM114-Status: GOOD ( 17.83 ) 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: Li Biwen , Len Brown , Greg Kroah-Hartman , linux-pm@vger.kernel.org, "Rafael J . Wysocki" , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Ran Wang , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The NXP's QorIQ Processors based on ARM Core have RCPM module (Run Control and Power Management), which performs all device-level tasks associated with power management such as wakeup source control. This driver depends on PM wakeup source framework which help to collect wake information. Signed-off-by: Ran Wang Acked-by: Pavel Machek --- Change in v5: - Fix v4 regression of the return value of wakeup_source_get_next() didn't pass to ws in while loop. - Rename wakeup_source member 'attached_dev' to 'dev'. - Rename property 'fsl,#rcpm-wakeup-cells' to '#fsl,rcpm-wakeup-cells'. please see https://lore.kernel.org/patchwork/patch/1101022/ Change in v4: - Remove extra ',' in author line of rcpm.c - Update usage of wakeup_source_get_next() to be less confusing to the reader, code logic remain the same. Change in v3: - Some whitespace ajdustment. Change in v2: - Rebase Kconfig and Makefile update to latest mainline. drivers/soc/fsl/Kconfig | 8 +++ drivers/soc/fsl/Makefile | 1 + drivers/soc/fsl/rcpm.c | 126 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 135 insertions(+) create mode 100644 drivers/soc/fsl/rcpm.c diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig index f9ad8ad..4918856 100644 --- a/drivers/soc/fsl/Kconfig +++ b/drivers/soc/fsl/Kconfig @@ -40,4 +40,12 @@ config DPAA2_CONSOLE /dev/dpaa2_mc_console and /dev/dpaa2_aiop_console, which can be used to dump the Management Complex and AIOP firmware logs. + +config FSL_RCPM + bool "Freescale RCPM support" + depends on PM_SLEEP + help + The NXP QorIQ Processors based on ARM Core have RCPM module + (Run Control and Power Management), which performs all device-level + tasks associated with power management, such as wakeup source control. endmenu diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile index 71dee8d..906f1cd 100644 --- a/drivers/soc/fsl/Makefile +++ b/drivers/soc/fsl/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_FSL_DPAA) += qbman/ obj-$(CONFIG_QUICC_ENGINE) += qe/ obj-$(CONFIG_CPM) += qe/ +obj-$(CONFIG_FSL_RCPM) += rcpm.o obj-$(CONFIG_FSL_GUTS) += guts.o obj-$(CONFIG_FSL_MC_DPIO) += dpio/ obj-$(CONFIG_DPAA2_CONSOLE) += dpaa2-console.o diff --git a/drivers/soc/fsl/rcpm.c b/drivers/soc/fsl/rcpm.c new file mode 100644 index 0000000..02244a1 --- /dev/null +++ b/drivers/soc/fsl/rcpm.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// rcpm.c - Freescale QorIQ RCPM driver +// +// Copyright 2019 NXP +// +// Author: Ran Wang + +#include +#include +#include +#include +#include +#include +#include + +#define RCPM_WAKEUP_CELL_MAX_SIZE 7 + +struct rcpm { + unsigned int wakeup_cells; + void __iomem *ippdexpcr_base; + bool little_endian; +}; + +static int rcpm_pm_prepare(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct wakeup_source *ws; + struct rcpm *rcpm; + u32 value[RCPM_WAKEUP_CELL_MAX_SIZE + 1], tmp; + int i, ret; + + rcpm = dev_get_drvdata(dev); + if (!rcpm) + return -EINVAL; + + /* Begin with first registered wakeup source */ + ws = NULL; + while (ws = wakeup_source_get_next(ws)) { + /* skip object which is not attached to device */ + if (!ws->dev) + continue; + + ret = device_property_read_u32_array(ws->dev, + "fsl,rcpm-wakeup", value, rcpm->wakeup_cells + 1); + + /* Wakeup source should refer to current rcpm device */ + if (ret || (np->phandle != value[0])) { + dev_info(dev, "%s doesn't refer to this rcpm\n", + ws->name); + continue; + } + + for (i = 0; i < rcpm->wakeup_cells; i++) { + /* We can only OR related bits */ + if (value[i + 1]) { + if (rcpm->little_endian) { + tmp = ioread32(rcpm->ippdexpcr_base + i * 4); + tmp |= value[i + 1]; + iowrite32(tmp, rcpm->ippdexpcr_base + i * 4); + } else { + tmp = ioread32be(rcpm->ippdexpcr_base + i * 4); + tmp |= value[i + 1]; + iowrite32be(tmp, rcpm->ippdexpcr_base + i * 4); + } + } + } + } + + return 0; +} + +static const struct dev_pm_ops rcpm_pm_ops = { + .prepare = rcpm_pm_prepare, +}; + +static int rcpm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *r; + struct rcpm *rcpm; + int ret; + + rcpm = devm_kzalloc(dev, sizeof(*rcpm), GFP_KERNEL); + if (!rcpm) + return -ENOMEM; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) + return -ENODEV; + + rcpm->ippdexpcr_base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(rcpm->ippdexpcr_base)) { + ret = PTR_ERR(rcpm->ippdexpcr_base); + return ret; + } + + rcpm->little_endian = device_property_read_bool( + &pdev->dev, "little-endian"); + + ret = device_property_read_u32(&pdev->dev, + "#fsl,rcpm-wakeup-cells", &rcpm->wakeup_cells); + if (ret) + return ret; + + dev_set_drvdata(&pdev->dev, rcpm); + + return 0; +} + +static const struct of_device_id rcpm_of_match[] = { + { .compatible = "fsl,qoriq-rcpm-2.1+", }, + {} +}; +MODULE_DEVICE_TABLE(of, rcpm_of_match); + +static struct platform_driver rcpm_driver = { + .driver = { + .name = "rcpm", + .of_match_table = rcpm_of_match, + .pm = &rcpm_pm_ops, + }, + .probe = rcpm_probe, +}; + +module_platform_driver(rcpm_driver); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel