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GET /api/patches/819038/?format=api
{ "id": 819038, "url": "http://patchwork.ozlabs.org/api/patches/819038/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pwm/patch/20170927083555.16580-8-romain.izard.pro@gmail.com/", "project": { "id": 38, "url": "http://patchwork.ozlabs.org/api/projects/38/?format=api", "name": "Linux PWM development", "link_name": "linux-pwm", "list_id": "linux-pwm.vger.kernel.org", "list_email": "linux-pwm@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170927083555.16580-8-romain.izard.pro@gmail.com>", "list_archive_url": null, "date": "2017-09-27T08:35:54", "name": "[v3,7/8] atmel_flexcom: Support backup mode", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "1e900756cc432cce1416b9d27eefdff16e657f04", "submitter": { "id": 8236, "url": "http://patchwork.ozlabs.org/api/people/8236/?format=api", "name": "Romain Izard", "email": "romain.izard.pro@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pwm/patch/20170927083555.16580-8-romain.izard.pro@gmail.com/mbox/", "series": [ { "id": 5310, "url": "http://patchwork.ozlabs.org/api/series/5310/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pwm/list/?series=5310", "date": "2017-09-27T08:35:48", "name": "Various patches for SAMA5D2 backup mode", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/5310/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/819038/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/819038/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linux-pwm-owner@vger.kernel.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=linux-pwm-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"mwb6mSSg\"; dkim-atps=neutral" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y2B521mPsz9t4Z\n\tfor <incoming@patchwork.ozlabs.org>;\n\tWed, 27 Sep 2017 18:36:54 +1000 (AEST)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1752649AbdI0Ig3 (ORCPT <rfc822;incoming@patchwork.ozlabs.org>);\n\tWed, 27 Sep 2017 04:36:29 -0400", "from mail-wm0-f67.google.com ([74.125.82.67]:33034 \"EHLO\n\tmail-wm0-f67.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1752571AbdI0IgV (ORCPT\n\t<rfc822; linux-pwm@vger.kernel.org>); Wed, 27 Sep 2017 04:36:21 -0400", "by mail-wm0-f67.google.com with SMTP id m127so10833249wmm.0;\n\tWed, 27 Sep 2017 01:36:20 -0700 (PDT)", "from localhost.localdomain (146.187.3.109.rev.sfr.net.\n\t[109.3.187.146]) by smtp.gmail.com with ESMTPSA id\n\tr6sm9699900wrg.40.2017.09.27.01.36.18\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tWed, 27 Sep 2017 01:36:19 -0700 (PDT)" ], "DKIM-Signature": "v=1; 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\n\tWed, 27 Sep 2017 01:36:19 -0700 (PDT)", "From": "Romain Izard <romain.izard.pro@gmail.com>", "To": "Boris Brezillon <boris.brezillon@free-electrons.com>,\n\tMichael Turquette <mturquette@baylibre.com>,\n\tStephen Boyd <sboyd@codeaurora.org>, Lee Jones <lee.jones@linaro.org>,\n\tWenyou Yang <wenyou.yang@atmel.com>, Josh Wu <rainyfeeling@outlook.com>,\n\tRichard Weinberger <richard@nod.at>,\n\tDavid Woodhouse <dwmw2@infradead.org>,\n\tBrian Norris <computersforpeace@gmail.com>,\n\tMarek Vasut <marek.vasut@gmail.com>,\n\tCyrille Pitchen <cyrille.pitchen@wedev4u.fr>,\n\tThierry Reding <thierry.reding@gmail.com>,\n\tRichard Genoud <richard.genoud@gmail.com>,\n\tGreg Kroah-Hartman <gregkh@linuxfoundation.org>,\n\tJiri Slaby <jslaby@suse.com>, Alan Stern <stern@rowland.harvard.edu>,\n\tLudovic Desroches <ludovic.desroches@microchip.com>,\n\tNicolas Ferre <nicolas.ferre@microchip.com>,\n\tAlexandre Belloni <alexandre.belloni@free-electrons.com>", "Cc": "linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,\n\tlinux-mtd@lists.infradead.org, linux-pwm@vger.kernel.org,\n\tlinux-serial@vger.kernel.org, linux-usb@vger.kernel.org,\n\tRomain Izard <romain.izard.pro@gmail.com>", "Subject": "[PATCH v3 7/8] atmel_flexcom: Support backup mode", "Date": "Wed, 27 Sep 2017 10:35:54 +0200", "Message-Id": "<20170927083555.16580-8-romain.izard.pro@gmail.com>", "X-Mailer": "git-send-email 2.11.0", "In-Reply-To": "<20170927083555.16580-1-romain.izard.pro@gmail.com>", "References": "<20170927083555.16580-1-romain.izard.pro@gmail.com>", "Sender": "linux-pwm-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<linux-pwm.vger.kernel.org>", "X-Mailing-List": "linux-pwm@vger.kernel.org" }, "content": "The controller used by a flexcom module is configured at boot, and left\nalone after this. As the configuration will be lost after backup mode,\nrestore the state of the flexcom driver on resume.\n\nSigned-off-by: Romain Izard <romain.izard.pro@gmail.com>\nAcked-by: Nicolas Ferre <nicolas.ferre@microchip.com>\nTested-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n---\n drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++++++++++++-----------\n 1 file changed, 50 insertions(+), 15 deletions(-)", "diff": "diff --git a/drivers/mfd/atmel-flexcom.c b/drivers/mfd/atmel-flexcom.c\nindex 064bde9cff5a..ef1235c4a179 100644\n--- a/drivers/mfd/atmel-flexcom.c\n+++ b/drivers/mfd/atmel-flexcom.c\n@@ -39,34 +39,44 @@\n #define FLEX_MR_OPMODE(opmode)\t(((opmode) << FLEX_MR_OPMODE_OFFSET) &\t\\\n \t\t\t\t FLEX_MR_OPMODE_MASK)\n \n+struct atmel_flexcom {\n+\tvoid __iomem *base;\n+\tu32 opmode;\n+\tstruct clk *clk;\n+};\n \n static int atmel_flexcom_probe(struct platform_device *pdev)\n {\n \tstruct device_node *np = pdev->dev.of_node;\n-\tstruct clk *clk;\n \tstruct resource *res;\n-\tvoid __iomem *base;\n-\tu32 opmode;\n+\tstruct atmel_flexcom *afc;\n \tint err;\n+\tu32 val;\n+\n+\tafc = devm_kzalloc(&pdev->dev, sizeof(*afc), GFP_KERNEL);\n+\tif (!afc)\n+\t\treturn -ENOMEM;\n \n-\terr = of_property_read_u32(np, \"atmel,flexcom-mode\", &opmode);\n+\tplatform_set_drvdata(pdev, afc);\n+\n+\terr = of_property_read_u32(np, \"atmel,flexcom-mode\", &afc->opmode);\n \tif (err)\n \t\treturn err;\n \n-\tif (opmode < ATMEL_FLEXCOM_MODE_USART ||\n-\t opmode > ATMEL_FLEXCOM_MODE_TWI)\n+\tif (afc->opmode < ATMEL_FLEXCOM_MODE_USART ||\n+\t afc->opmode > ATMEL_FLEXCOM_MODE_TWI)\n \t\treturn -EINVAL;\n \n \tres = platform_get_resource(pdev, IORESOURCE_MEM, 0);\n-\tbase = devm_ioremap_resource(&pdev->dev, res);\n-\tif (IS_ERR(base))\n-\t\treturn PTR_ERR(base);\n+\tafc->base = devm_ioremap_resource(&pdev->dev, res);\n+\tif (IS_ERR(afc->base))\n+\t\treturn PTR_ERR(afc->base);\n \n-\tclk = devm_clk_get(&pdev->dev, NULL);\n-\tif (IS_ERR(clk))\n-\t\treturn PTR_ERR(clk);\n+\tafc->clk = devm_clk_get(&pdev->dev, NULL);\n+\tif (IS_ERR(afc->clk))\n+\t\treturn PTR_ERR(afc->clk);\n \n-\terr = clk_prepare_enable(clk);\n+\terr = clk_prepare_enable(afc->clk);\n \tif (err)\n \t\treturn err;\n \n@@ -76,9 +86,10 @@ static int atmel_flexcom_probe(struct platform_device *pdev)\n \t * inaccessible and are read as zero. Also the external I/O lines of the\n \t * Flexcom are muxed to reach the selected device.\n \t */\n-\twritel(FLEX_MR_OPMODE(opmode), base + FLEX_MR);\n+\tval = FLEX_MR_OPMODE(afc->opmode);\n+\twritel(val, afc->base + FLEX_MR);\n \n-\tclk_disable_unprepare(clk);\n+\tclk_disable_unprepare(afc->clk);\n \n \treturn devm_of_platform_populate(&pdev->dev);\n }\n@@ -89,10 +100,34 @@ static const struct of_device_id atmel_flexcom_of_match[] = {\n };\n MODULE_DEVICE_TABLE(of, atmel_flexcom_of_match);\n \n+#ifdef CONFIG_PM_SLEEP\n+static int atmel_flexcom_resume(struct device *dev)\n+{\n+\tstruct atmel_flexcom *afc = dev_get_drvdata(dev);\n+\tint err;\n+\tu32 val;\n+\n+\terr = clk_prepare_enable(afc->clk);\n+\tif (err)\n+\t\treturn err;\n+\n+\tval = FLEX_MR_OPMODE(afc->opmode),\n+\twritel(val, afc->base + FLEX_MR);\n+\n+\tclk_disable_unprepare(afc->clk);\n+\n+\treturn 0;\n+}\n+#endif\n+\n+static SIMPLE_DEV_PM_OPS(atmel_flexcom_pm_ops, NULL,\n+\t\t\t atmel_flexcom_resume);\n+\n static struct platform_driver atmel_flexcom_driver = {\n \t.probe\t= atmel_flexcom_probe,\n \t.driver\t= {\n \t\t.name\t\t= \"atmel_flexcom\",\n+\t\t.pm\t\t= &atmel_flexcom_pm_ops,\n \t\t.of_match_table\t= atmel_flexcom_of_match,\n \t},\n };\n", "prefixes": [ "v3", "7/8" ] }