[{"id":1770787,"web_url":"http://patchwork.ozlabs.org/comment/1770787/","msgid":"<53aa7783-0ecf-1e68-1bf9-c470ba2f79eb@microchip.com>","list_archive_url":null,"date":"2017-09-19T09:29:12","subject":"Re: [PATCH v2 8/9] atmel_flexcom: Support backup mode","submitter":{"id":71036,"url":"http://patchwork.ozlabs.org/api/people/71036/","name":"Nicolas Ferre","email":"nicolas.ferre@microchip.com"},"content":"On 15/09/2017 at 16:04, Romain Izard wrote:\n> The controller used by a flexcom module is configured at boot, and left\n> alone after this. As the configuration will be lost after backup mode,\n> restore the state of the flexcom driver on resume.\n> \n> Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>\n\nTested-by: Nicolas Ferre <nicolas.ferre@microchip.com>\nOn sama5d2 Xplained board (i2c0 from flexcom 4).\nand obviously:\nAcked-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n\nThanks Romain!\n\nRegards,\n\n> ---\n>  drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++++++++++++-----------\n>  1 file changed, 50 insertions(+), 15 deletions(-)\n> \n> diff --git a/drivers/mfd/atmel-flexcom.c b/drivers/mfd/atmel-flexcom.c\n> index 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>","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; 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d=\"scan'208\";a=\"6931727\"","Subject":"Re: [PATCH v2 8/9] atmel_flexcom: Support backup mode","To":"Romain Izard <romain.izard.pro@gmail.com>,\n\tAlexandre Belloni <alexandre.belloni@free-electrons.com>,\n\tBoris Brezillon <boris.brezillon@free-electrons.com>,\n\tMichael Turquette <mturquette@baylibre.com>,\n\tStephen Boyd <sboyd@codeaurora.org>,\n\tLudovic Desroches <ludovic.desroches@microchip.com>,\n\tWenyou Yang <wenyou.yang@atmel.com>, Josh Wu <rainyfeeling@outlook.com>,\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\tAlan Stern <stern@rowland.harvard.edu>, Lee Jones <lee.jones@linaro.org>","CC":"<linux-clk@vger.kernel.org>, <linux-kernel@vger.kernel.org>,\n\t<linux-mtd@lists.infradead.org>, <linux-pwm@vger.kernel.org>,\n\t<linux-serial@vger.kernel.org>, <linux-usb@vger.kernel.org>,\n\t<linux-arm-kernel@lists.infradead.org>","References":"<20170915140411.31716-1-romain.izard.pro@gmail.com>\n\t<20170915140411.31716-9-romain.izard.pro@gmail.com>","From":"Nicolas Ferre <nicolas.ferre@microchip.com>","Organization":"microchip","Message-ID":"<53aa7783-0ecf-1e68-1bf9-c470ba2f79eb@microchip.com>","Date":"Tue, 19 Sep 2017 11:29:12 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"<20170915140411.31716-9-romain.izard.pro@gmail.com>","Content-Type":"text/plain; charset=\"utf-8\"","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","Sender":"linux-pwm-owner@vger.kernel.org","Precedence":"bulk","List-ID":"<linux-pwm.vger.kernel.org>","X-Mailing-List":"linux-pwm@vger.kernel.org"}},{"id":1771150,"web_url":"http://patchwork.ozlabs.org/comment/1771150/","msgid":"<20170919152504.nhp5i734u75gb5gq@dell>","list_archive_url":null,"date":"2017-09-19T15:25:04","subject":"Re: [PATCH v2 8/9] atmel_flexcom: Support backup mode","submitter":{"id":12720,"url":"http://patchwork.ozlabs.org/api/people/12720/","name":"Lee Jones","email":"lee.jones@linaro.org"},"content":"On Tue, 19 Sep 2017, Nicolas Ferre wrote:\n\n> On 15/09/2017 at 16:04, Romain Izard wrote:\n> > The controller used by a flexcom module is configured at boot, and left\n> > alone after this. As the configuration will be lost after backup mode,\n> > restore the state of the flexcom driver on resume.\n> > \n> > Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>\n> \n> Tested-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n> On sama5d2 Xplained board (i2c0 from flexcom 4).\n> and obviously:\n> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n> \n> Thanks Romain!\n> \n> Regards,\n> \n> > ---\n> >  drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++++++++++++-----------\n> >  1 file changed, 50 insertions(+), 15 deletions(-)\n\nThis is the first time I've seen this patch.  Why's that?","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\" (1024-bit key;\n\tunprotected) header.d=linaro.org header.i=@linaro.org\n\theader.b=\"DdTtWYcC\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xxRX76rBfz9s7B\n\tfor <incoming@patchwork.ozlabs.org>;\n\tWed, 20 Sep 2017 01:25:27 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751859AbdISPZO (ORCPT <rfc822;incoming@patchwork.ozlabs.org>);\n\tTue, 19 Sep 2017 11:25:14 -0400","from mail-wm0-f45.google.com ([74.125.82.45]:51038 \"EHLO\n\tmail-wm0-f45.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751641AbdISPZJ (ORCPT\n\t<rfc822; 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charset=utf-8","Content-Disposition":"inline","Content-Transfer-Encoding":"8bit","In-Reply-To":"<53aa7783-0ecf-1e68-1bf9-c470ba2f79eb@microchip.com>","User-Agent":"NeoMutt/20170113 (1.7.2)","Sender":"linux-pwm-owner@vger.kernel.org","Precedence":"bulk","List-ID":"<linux-pwm.vger.kernel.org>","X-Mailing-List":"linux-pwm@vger.kernel.org"}},{"id":1771675,"web_url":"http://patchwork.ozlabs.org/comment/1771675/","msgid":"<CAGkQfmM08UqpLoMegRGQwmamN=Z74fem9VWT5yGcSjkYdS5c=Q@mail.gmail.com>","list_archive_url":null,"date":"2017-09-20T08:30:31","subject":"Re: [PATCH v2 8/9] atmel_flexcom: Support backup mode","submitter":{"id":8236,"url":"http://patchwork.ozlabs.org/api/people/8236/","name":"Romain Izard","email":"romain.izard.pro@gmail.com"},"content":"2017-09-19 17:25 GMT+02:00 Lee Jones <lee.jones@linaro.org>:\n> On Tue, 19 Sep 2017, Nicolas Ferre wrote:\n>\n>> On 15/09/2017 at 16:04, Romain Izard wrote:\n>> > The controller used by a flexcom module is configured at boot, and left\n>> > alone after this. As the configuration will be lost after backup mode,\n>> > restore the state of the flexcom driver on resume.\n>> >\n>> > Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>\n>>\n>> Tested-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n>> On sama5d2 Xplained board (i2c0 from flexcom 4).\n>> and obviously:\n>> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n>>\n>> Thanks Romain!\n>>\n>> Regards,\n>>\n>> > ---\n>> >  drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++++++++++++-----------\n>> >  1 file changed, 50 insertions(+), 15 deletions(-)\n>\n> This is the first time I've seen this patch.  Why's that?\n>\n\nAs the patchset covers many subsystems, get_maintainers.pl provided a\nvery long list of both developpers and mailing lists (28). I thought it\nwas a good idea to shorten it a little. Bad idea. Sorry.\n\nBest regards,","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\" (1024-bit key;\n\tsecure) header.d=mobile-devices.fr header.i=@mobile-devices.fr\n\theader.b=\"scEozuOl\"; \n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"tUhDWT2/\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xxtHn0GXZz9s06\n\tfor <incoming@patchwork.ozlabs.org>;\n\tWed, 20 Sep 2017 18:31:17 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751887AbdITIa4 (ORCPT <rfc822;incoming@patchwork.ozlabs.org>);\n\tWed, 20 Sep 2017 04:30:56 -0400","from mail-qt0-f179.google.com ([209.85.216.179]:57135 \"EHLO\n\tmail-qt0-f179.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751783AbdITIaw (ORCPT\n\t<rfc822; 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charset=\"UTF-8\"","Sender":"linux-pwm-owner@vger.kernel.org","Precedence":"bulk","List-ID":"<linux-pwm.vger.kernel.org>","X-Mailing-List":"linux-pwm@vger.kernel.org"}},{"id":1771702,"web_url":"http://patchwork.ozlabs.org/comment/1771702/","msgid":"<20170920091829.wftbjshog3ixvpmu@piout.net>","list_archive_url":null,"date":"2017-09-20T09:18:29","subject":"Re: [PATCH v2 8/9] atmel_flexcom: Support backup mode","submitter":{"id":26276,"url":"http://patchwork.ozlabs.org/api/people/26276/","name":"Alexandre Belloni","email":"alexandre.belloni@free-electrons.com"},"content":"On 20/09/2017 at 10:30:31 +0200, Romain Izard wrote:\n> 2017-09-19 17:25 GMT+02:00 Lee Jones <lee.jones@linaro.org>:\n> > On Tue, 19 Sep 2017, Nicolas Ferre wrote:\n> >\n> >> On 15/09/2017 at 16:04, Romain Izard wrote:\n> >> > The controller used by a flexcom module is configured at boot, and left\n> >> > alone after this. As the configuration will be lost after backup mode,\n> >> > restore the state of the flexcom driver on resume.\n> >> >\n> >> > Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>\n> >>\n> >> Tested-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n> >> On sama5d2 Xplained board (i2c0 from flexcom 4).\n> >> and obviously:\n> >> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>\n> >>\n> >> Thanks Romain!\n> >>\n> >> Regards,\n> >>\n> >> > ---\n> >> >  drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++++++++++++-----------\n> >> >  1 file changed, 50 insertions(+), 15 deletions(-)\n> >\n> > This is the first time I've seen this patch.  Why's that?\n> >\n> \n> As the patchset covers many subsystems, get_maintainers.pl provided a\n> very long list of both developpers and mailing lists (28). I thought it\n> was a good idea to shorten it a little. Bad idea. Sorry.\n> \n\nI think the correct way of handling that would have been to send each\npatch to the proper subsystem as there are no dependency here.","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>)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xxvLP4jqSz9sP1\n\tfor <incoming@patchwork.ozlabs.org>;\n\tWed, 20 Sep 2017 19:18:37 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751585AbdITJSg (ORCPT <rfc822;incoming@patchwork.ozlabs.org>);\n\tWed, 20 Sep 2017 05:18:36 -0400","from mail.free-electrons.com ([62.4.15.54]:49698 \"EHLO\n\tmail.free-electrons.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751554AbdITJSe (ORCPT\n\t<rfc822; linux-pwm@vger.kernel.org>); Wed, 20 Sep 2017 05:18:34 -0400","by mail.free-electrons.com (Postfix, from userid 110)\n\tid 2A8B620945; Wed, 20 Sep 2017 11:18:32 +0200 (CEST)","from localhost (cpe-98-151-125-52.hawaii.res.rr.com\n\t[98.151.125.52])\n\tby mail.free-electrons.com (Postfix) with ESMTPSA id 2DC2020929;\n\tWed, 20 Sep 2017 11:18:31 +0200 (CEST)"],"X-Spam-Checker-Version":"SpamAssassin 3.4.0 (2014-02-07) on\n\tmail.free-electrons.com","X-Spam-Level":"","X-Spam-Status":"No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT,\n\tURIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0","Date":"Wed, 20 Sep 2017 11:18:29 +0200","From":"Alexandre Belloni <alexandre.belloni@free-electrons.com>","To":"Romain Izard <romain.izard.pro@gmail.com>","Cc":"Lee Jones <lee.jones@linaro.org>,\n\tNicolas Ferre <nicolas.ferre@microchip.com>,\n\tBoris Brezillon <boris.brezillon@free-electrons.com>,\n\tMichael Turquette <mturquette@baylibre.com>,\n\tStephen Boyd <sboyd@codeaurora.org>,\n\tLudovic Desroches <ludovic.desroches@microchip.com>,\n\tWenyou Yang <wenyou.yang@atmel.com>, Josh Wu <rainyfeeling@outlook.com>,\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\tAlan Stern <stern@rowland.harvard.edu>,\n\tlinux-clk@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,\n\tlinux-mtd <linux-mtd@lists.infradead.org>,\n\tlinux-pwm@vger.kernel.org, linux-serial@vger.kernel.org,\n\tlinux-usb@vger.kernel.org,\n\tlinux-arm-kernel <linux-arm-kernel@lists.infradead.org>","Subject":"Re: [PATCH v2 8/9] atmel_flexcom: Support backup mode","Message-ID":"<20170920091829.wftbjshog3ixvpmu@piout.net>","References":"<20170915140411.31716-1-romain.izard.pro@gmail.com>\n\t<20170915140411.31716-9-romain.izard.pro@gmail.com>\n\t<53aa7783-0ecf-1e68-1bf9-c470ba2f79eb@microchip.com>\n\t<20170919152504.nhp5i734u75gb5gq@dell>\n\t<CAGkQfmM08UqpLoMegRGQwmamN=Z74fem9VWT5yGcSjkYdS5c=Q@mail.gmail.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<CAGkQfmM08UqpLoMegRGQwmamN=Z74fem9VWT5yGcSjkYdS5c=Q@mail.gmail.com>","User-Agent":"NeoMutt/20170609 (1.8.3)","Sender":"linux-pwm-owner@vger.kernel.org","Precedence":"bulk","List-ID":"<linux-pwm.vger.kernel.org>","X-Mailing-List":"linux-pwm@vger.kernel.org"}}]