{"id":811655,"url":"http://patchwork.ozlabs.org/api/patches/811655/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pwm/patch/20170908153604.28383-9-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":"<20170908153604.28383-9-romain.izard.pro@gmail.com>","list_archive_url":null,"date":"2017-09-08T15:36:02","name":"[v1,08/10] pwm: atmel-tcb: Support backup mode","commit_ref":null,"pull_url":null,"state":"superseded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=json","name":"Romain Izard","email":"romain.izard.pro@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pwm/patch/20170908153604.28383-9-romain.izard.pro@gmail.com/mbox/","series":[{"id":2238,"url":"http://patchwork.ozlabs.org/api/series/2238/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pwm/list/?series=2238","date":"2017-09-08T15:35:55","name":"Various patches for SAMA5D2 backup mode","version":1,"mbox":"http://patchwork.ozlabs.org/series/2238/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/811655/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/811655/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=\"TY6o7LVn\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xphMV6HpPz9t2r\n\tfor ;\n\tSat, 9 Sep 2017 01:38:47 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S932424AbdIHPgc (ORCPT );\n\tFri, 8 Sep 2017 11:36:32 -0400","from mail-wr0-f193.google.com ([209.85.128.193]:37803 \"EHLO\n\tmail-wr0-f193.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1756599AbdIHPg2 (ORCPT\n\t); Fri, 8 Sep 2017 11:36:28 -0400","by mail-wr0-f193.google.com with SMTP id u48so1404646wrf.4;\n\tFri, 08 Sep 2017 08:36:27 -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\tp199sm1689224wmb.28.2017.09.08.08.36.25\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tFri, 08 Sep 2017 08:36:25 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=gmail.com; s=20161025;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=NDApdviIu3Db8+b8uunR9YuI98yCLIzKvo6HtsMxdgo=;\n\tb=TY6o7LVn7upJV/xZG7/pwh21Y5X/pp1AjKZxOFKXBoqLCvSsEg++mumqANjWJwQlPa\n\tAl0tsecTQ4AUPovH1tVgSu3XA/DS7Cj1AHpi8w9b8gHtkTIQw3DlWLbkP95jl6ZohY75\n\tVRmSHCK6eW3Ylm7WHLH1iMxrCavEmu9Af/8c9jZ4cgrzkOW+1pFqEp8SoT8XypxuetwB\n\tkaXGu2n3DGivupzya66H03ZL9AoFFKoTKiow5W3PJJDmy5gL3eeEdT98I0sX4caY8qSM\n\tcR+GNLFlPAa1pzxx1SAO3gG4/4lJq8e83g69oAn7eKkfV9qyhrExHMCRXpINs7Q3M+pg\n\tufdA==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=NDApdviIu3Db8+b8uunR9YuI98yCLIzKvo6HtsMxdgo=;\n\tb=DjqLWZpKd5dq5nBocteimSsM9lYupJ4Wql8GLduTrgY/hHbT10FqZGMBkJfCOcVeG2\n\tOspF5/y5xpuPHoZ4Ms97MW/HovvCwpHkYLGmoXvQWvnDrxWY2fY156i10yUtoM4Lj1Tl\n\tFEoNdboJbzi+X80NYXKj1gbk/lw7GZD4mRzbfOe4BwRqkd/cqFx5J3Xlx36ANWrlIxb+\n\tRhtp0cc02DGLcBg5K3mai/DBBaEnNhqk9KRCwcimn3ljYqua/A2QLfR9vygdSyTuPeTu\n\tTi+XBXzBOB6nmWnsxqdFlw6NSi3q50U0SsdULGrUdNDx2HX4cuYlDRZ3em54OAFeZ2mK\n\thnxQ==","X-Gm-Message-State":"AHPjjUhyTlcXg8eccqwA6B1Est4g3kvmWkfLX7z1tt/fn5fBsD2WdkaJ\n\tPJZy2BUuS4K9RQ==","X-Google-Smtp-Source":"ADKCNb6DntRxaG+4IaMIUDWaqhFd16uZqFk7iKuRXdfWIoxx3lusMdsQ/dZa6qIH2pU8xyXYNCtgWg==","X-Received":"by 10.223.153.163 with SMTP id y32mr2616385wrb.8.1504884986460; \n\tFri, 08 Sep 2017 08:36:26 -0700 (PDT)","From":"Romain Izard ","To":"Nicolas Ferre ,\n\tBoris Brezillon ,\n\tMichael Turquette ,\n\tStephen Boyd ,\n\tLudovic Desroches ,\n\tJonathan Cameron , Wenyou Yang ,\n\tJosh Wu ,\n\tDavid Woodhouse ,\n\tBrian Norris ,\n\tMarek Vasut ,\n\tCyrille Pitchen ,\n\tThierry Reding ,\n\tRichard Genoud ,\n\tGreg Kroah-Hartman ,\n\tAlan Stern ","Cc":"linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,\n\tlinux-iio@vger.kernel.org, linux-mtd@lists.infradead.org,\n\tlinux-pwm@vger.kernel.org, linux-serial@vger.kernel.org,\n\tlinux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org,\n\tRomain Izard ","Subject":"[PATCH v1 08/10] pwm: atmel-tcb: Support backup mode","Date":"Fri, 8 Sep 2017 17:36:02 +0200","Message-Id":"<20170908153604.28383-9-romain.izard.pro@gmail.com>","X-Mailer":"git-send-email 2.11.0","In-Reply-To":"<20170908153604.28383-1-romain.izard.pro@gmail.com>","References":"<20170908153604.28383-1-romain.izard.pro@gmail.com>","Sender":"linux-pwm-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","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 \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":["v1","08/10"]}