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GET /api/patches/814288/?format=api
{ "id": 814288, "url": "http://patchwork.ozlabs.org/api/patches/814288/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pwm/patch/20170915140411.31716-8-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": "<20170915140411.31716-8-romain.izard.pro@gmail.com>", "list_archive_url": null, "date": "2017-09-15T14:04:09", "name": "[v2,7/9] pwm: atmel-tcb: Support backup mode", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "93c682676178439e5c82911415f64b6a91550c07", "submitter": { "id": 8236, "url":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/20170915140411.31716-8-romain.izard.pro@gmail.com/mbox/", "series": [ { "id": 3315, "url": "http://patchwork.ozlabs.org/api/series/3315/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pwm/list/?series=3315", "date": "2017-09-15T14:04:06", "name": "Various patches for SAMA5D2 backup mode", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/3315/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/814288/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/814288/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=\"NsXItSlw\"; dkim-atps=neutral" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xtxyY65Wpz9s7m\n\tfor <incoming@patchwork.ozlabs.org>;\n\tSat, 16 Sep 2017 00:06:13 +1000 (AEST)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751779AbdIOOFY (ORCPT <rfc822;incoming@patchwork.ozlabs.org>);\n\tFri, 15 Sep 2017 10:05:24 -0400", "from mail-wm0-f65.google.com ([74.125.82.65]:32863 \"EHLO\n\tmail-wm0-f65.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751722AbdIOOFV (ORCPT\n\t<rfc822; linux-pwm@vger.kernel.org>); Fri, 15 Sep 2017 10:05:21 -0400", "by mail-wm0-f65.google.com with SMTP id 187so2896767wmn.0;\n\tFri, 15 Sep 2017 07:05:19 -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\t55sm1399225wrw.60.2017.09.15.07.05.14\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tFri, 15 Sep 2017 07:05:18 -0700 (PDT)" ], "DKIM-Signature": "v=1; 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\n\tFri, 15 Sep 2017 07:05:19 -0700 (PDT)", "From": "Romain Izard <romain.izard.pro@gmail.com>", "To": "Nicolas Ferre <nicolas.ferre@microchip.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>", "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\tlinux-arm-kernel@lists.infradead.org,\n\tRomain Izard <romain.izard.pro@gmail.com>", "Subject": "[PATCH v2 7/9] pwm: atmel-tcb: Support backup mode", "Date": "Fri, 15 Sep 2017 16:04:09 +0200", "Message-Id": "<20170915140411.31716-8-romain.izard.pro@gmail.com>", "X-Mailer": "git-send-email 2.11.0", "In-Reply-To": "<20170915140411.31716-1-romain.izard.pro@gmail.com>", "References": "<20170915140411.31716-1-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": "Save and restore registers for the PWM on suspend and resume, which\nmakes hibernation and backup modes possible.\n\nSigned-off-by: Romain Izard <romain.izard.pro@gmail.com>\n---\n drivers/pwm/pwm-atmel-tcb.c | 63 +++++++++++++++++++++++++++++++++++++++++++--\n 1 file changed, 61 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c\nindex 75db585a2a94..acd3ce8ecf3f 100644\n--- a/drivers/pwm/pwm-atmel-tcb.c\n+++ b/drivers/pwm/pwm-atmel-tcb.c\n@@ -37,11 +37,20 @@ struct atmel_tcb_pwm_device {\n \tunsigned period;\t\t/* PWM period expressed in clk cycles */\n };\n \n+struct atmel_tcb_channel {\n+\tu32 enabled;\n+\tu32 cmr;\n+\tu32 ra;\n+\tu32 rb;\n+\tu32 rc;\n+};\n+\n struct atmel_tcb_pwm_chip {\n \tstruct pwm_chip chip;\n \tspinlock_t lock;\n \tstruct atmel_tc *tc;\n \tstruct atmel_tcb_pwm_device *pwms[NPWM];\n+\tstruct atmel_tcb_channel bkup[NPWM / 2];\n };\n \n static inline struct atmel_tcb_pwm_chip *to_tcb_chip(struct pwm_chip *chip)\n@@ -175,12 +184,15 @@ static void atmel_tcb_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)\n \t * Use software trigger to apply the new setting.\n \t * If both PWM devices in this group are disabled we stop the clock.\n \t */\n-\tif (!(cmr & (ATMEL_TC_ACPC | ATMEL_TC_BCPC)))\n+\tif (!(cmr & (ATMEL_TC_ACPC | ATMEL_TC_BCPC))) {\n \t\t__raw_writel(ATMEL_TC_SWTRG | ATMEL_TC_CLKDIS,\n \t\t\t regs + ATMEL_TC_REG(group, CCR));\n-\telse\n+\t\ttcbpwmc->bkup[group].enabled = 1;\n+\t} else {\n \t\t__raw_writel(ATMEL_TC_SWTRG, regs +\n \t\t\t ATMEL_TC_REG(group, CCR));\n+\t\ttcbpwmc->bkup[group].enabled = 0;\n+\t}\n \n \tspin_unlock(&tcbpwmc->lock);\n }\n@@ -263,6 +275,7 @@ static int atmel_tcb_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)\n \t/* Use software trigger to apply the new setting */\n \t__raw_writel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG,\n \t\t regs + ATMEL_TC_REG(group, CCR));\n+\ttcbpwmc->bkup[group].enabled = 1;\n \tspin_unlock(&tcbpwmc->lock);\n \treturn 0;\n }\n@@ -445,10 +458,56 @@ static const struct of_device_id atmel_tcb_pwm_dt_ids[] = {\n };\n MODULE_DEVICE_TABLE(of, atmel_tcb_pwm_dt_ids);\n \n+#ifdef CONFIG_PM_SLEEP\n+static int atmel_tcb_pwm_suspend(struct device *dev)\n+{\n+\tstruct platform_device *pdev = to_platform_device(dev);\n+\tstruct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);\n+\tvoid __iomem *base = tcbpwm->tc->regs;\n+\tint i;\n+\n+\tfor (i = 0; i < (NPWM / 2); i++) {\n+\t\tstruct atmel_tcb_channel *chan = &tcbpwm->bkup[i];\n+\n+\t\tchan->cmr = readl(base + ATMEL_TC_REG(i, CMR));\n+\t\tchan->ra = readl(base + ATMEL_TC_REG(i, RA));\n+\t\tchan->rb = readl(base + ATMEL_TC_REG(i, RB));\n+\t\tchan->rc = readl(base + ATMEL_TC_REG(i, RC));\n+\t}\n+\treturn 0;\n+}\n+\n+static int atmel_tcb_pwm_resume(struct device *dev)\n+{\n+\tstruct platform_device *pdev = to_platform_device(dev);\n+\tstruct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);\n+\tvoid __iomem *base = tcbpwm->tc->regs;\n+\tint i;\n+\n+\tfor (i = 0; i < (NPWM / 2); i++) {\n+\t\tstruct atmel_tcb_channel *chan = &tcbpwm->bkup[i];\n+\n+\t\twritel(chan->cmr, base + ATMEL_TC_REG(i, CMR));\n+\t\twritel(chan->ra, base + ATMEL_TC_REG(i, RA));\n+\t\twritel(chan->rb, base + ATMEL_TC_REG(i, RB));\n+\t\twritel(chan->rc, base + ATMEL_TC_REG(i, RC));\n+\t\tif (chan->enabled) {\n+\t\t\twritel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG,\n+\t\t\t\tbase + ATMEL_TC_REG(i, CCR));\n+\t\t}\n+\t}\n+\treturn 0;\n+}\n+#endif\n+\n+static SIMPLE_DEV_PM_OPS(atmel_tcb_pwm_pm_ops, atmel_tcb_pwm_suspend,\n+\t\t\t atmel_tcb_pwm_resume);\n+\n static struct platform_driver atmel_tcb_pwm_driver = {\n \t.driver = {\n \t\t.name = \"atmel-tcb-pwm\",\n \t\t.of_match_table = atmel_tcb_pwm_dt_ids,\n+\t\t.pm = &atmel_tcb_pwm_pm_ops,\n \t},\n \t.probe = atmel_tcb_pwm_probe,\n \t.remove = atmel_tcb_pwm_remove,\n", "prefixes": [ "v2", "7/9" ] }