From patchwork Tue Oct 22 07:51:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ran Wang X-Patchwork-Id: 11203869 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 F1D6B14E5 for ; Tue, 22 Oct 2019 07:52:11 +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 C5A8820B7C for ; Tue, 22 Oct 2019 07:52:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="H9/uEjT9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C5A8820B7C 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+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=ODl7Zikf8niI3qODyI9Einb/XJ8l8NoJNqXrOY5BdAQ=; b=H9/uEjT97hlcDvGPcCj7Wm3lkU F8+OsaBpuoKho7RNZoUomZWZRFgzQqC6dRDFlqHAInzS2HrgourHa+tqHLuUO6jguDJpTov2bKuee YTPqNO2YW79yB/DZT6eW9Oh/GRMs+Y4RrCjR8mwOR3+L1EzE2PlZTp6GANZ3b7y4kzqBJuLwnPnEI yqIebcfaaKieRvcAi8LDRDHRdxU9J52XTr50oj84gDu/HSRZjI4dXcB50ozV39ArYe3RC/V+gz9WK 0VPLxtsaOFU0spDfNlNAwno3hp43Hmw+4L1RVEy8Zn00HsSsKIejIoex9NTFt1EmcQNKUQwuKep/O 1PEXO/ow==; 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 1iMoxd-00076d-Be; Tue, 22 Oct 2019 07:52:09 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMoxI-0006pu-3z for linux-arm-kernel@lists.infradead.org; Tue, 22 Oct 2019 07:51:51 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 7EE3F2005E9; Tue, 22 Oct 2019 09:51:46 +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 D2B7A2000D9; Tue, 22 Oct 2019 09:51:39 +0200 (CEST) Received: from localhost.localdomain (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id AD412402F3; Tue, 22 Oct 2019 15:51:31 +0800 (SGT) From: Ran Wang To: "Rafael J . Wysocki" , Rob Herring , Li Yang , Mark Rutland , Pavel Machek , Huang Anson Subject: [PATCH 3/3] soc: fsl: add RCPM driver Date: Tue, 22 Oct 2019 15:51:23 +0800 Message-Id: <20191022075123.17057-3-ran.wang_1@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191022075123.17057-1-ran.wang_1@nxp.com> References: <20191022075123.17057-1-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-20191022_005148_441498_CEB261D6 X-CRM114-Status: GOOD ( 19.54 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [92.121.34.21 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 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 , devicetree@vger.kernel.org, Greg Kroah-Hartman , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Ran Wang , linuxppc-dev@lists.ozlabs.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 The NXP's QorIQ Processors based on ARM Core have RCPM module (Run Control and Power Management), which performs system 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 --- Change in v8: - Adjust related API usage to meet wakeup.c's update in patch 1/3. - Add sanity checking for the case of ws->dev or ws->dev->parent is null. Change in v7: - Replace 'ws->dev' with 'ws->dev->parent' to get aligned with c8377adfa781 ("PM / wakeup: Show wakeup sources stats in sysfs") - Remove '+obj-y += ftm_alarm.o' since it is wrong. - Cosmetic work. Change in v6: - Adjust related API usage to meet wakeup.c's update in patch 1/3. 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 | 133 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 142 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..3ed135e --- /dev/null +++ b/drivers/soc/fsl/rcpm.c @@ -0,0 +1,133 @@ +// 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) +{ + int i, ret, idx; + void __iomem *base; + struct wakeup_source *ws; + struct rcpm *rcpm; + struct device_node *np = dev->of_node; + u32 value[RCPM_WAKEUP_CELL_MAX_SIZE + 1], tmp; + + rcpm = dev_get_drvdata(dev); + if (!rcpm) + return -EINVAL; + + base = rcpm->ippdexpcr_base; + idx = wakeup_sources_read_lock(); + + /* Begin with first registered wakeup source */ + for_each_wakeup_source(ws) { + + /* skip object which is not attached to device */ + if (!ws->dev || !ws->dev->parent) + continue; + + ret = device_property_read_u32_array(ws->dev->parent, + "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(base + i * 4); + tmp |= value[i + 1]; + iowrite32(tmp, base + i * 4); + } else { + tmp = ioread32be(base + i * 4); + tmp |= value[i + 1]; + iowrite32be(tmp, base + i * 4); + } + } + } + } + + wakeup_sources_read_unlock(idx); + + 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);