{"id":819471,"url":"http://patchwork.ozlabs.org/api/patches/819471/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pwm/patch/20170928094627.31017-8-romain.izard.pro@gmail.com/","project":{"id":38,"url":"http://patchwork.ozlabs.org/api/projects/38/?format=json","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":"<20170928094627.31017-8-romain.izard.pro@gmail.com>","list_archive_url":null,"date":"2017-09-28T09:46:26","name":"[v4,7/8] atmel_flexcom: Support backup mode","commit_ref":null,"pull_url":null,"state":"superseded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=json","name":"Romain Izard","email":"romain.izard.pro@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pwm/patch/20170928094627.31017-8-romain.izard.pro@gmail.com/mbox/","series":[{"id":5525,"url":"http://patchwork.ozlabs.org/api/series/5525/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pwm/list/?series=5525","date":"2017-09-28T09:46:20","name":"Various patches for SAMA5D2 backup mode","version":4,"mbox":"http://patchwork.ozlabs.org/series/5525/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/819471/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/819471/checks/","tags":{},"related":[],"headers":{"Return-Path":"","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=)","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=\"J9GFVGDZ\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y2qbv3sR2z9t3v\n\tfor ;\n\tThu, 28 Sep 2017 19:47:23 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1752796AbdI1JrK (ORCPT );\n\tThu, 28 Sep 2017 05:47:10 -0400","from mail-wr0-f195.google.com ([209.85.128.195]:37814 \"EHLO\n\tmail-wr0-f195.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1752376AbdI1Jqt (ORCPT\n\t); Thu, 28 Sep 2017 05:46:49 -0400","by mail-wr0-f195.google.com with SMTP id u48so1477916wrf.4;\n\tThu, 28 Sep 2017 02:46:47 -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\tz10sm3272395wre.6.2017.09.28.02.46.46\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tThu, 28 Sep 2017 02:46:46 -0700 (PDT)"],"DKIM-Signature":"v=1; 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As the configuration will be lost after backup mode,\nrestore the state of the flexcom driver on resume.\n\nSigned-off-by: Romain Izard \nAcked-by: Nicolas Ferre \nTested-by: Nicolas Ferre \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":["v4","7/8"]}