From patchwork Tue Aug 11 08:59:25 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 31125 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from mail-yw0-f166.google.com (mail-yw0-f166.google.com [209.85.211.166]) by bilbo.ozlabs.org (Postfix) with ESMTP id 1D94BB6EDF for ; Tue, 11 Aug 2009 19:09:40 +1000 (EST) Received: by ywh38 with SMTP id 38so5338988ywh.29 for ; Tue, 11 Aug 2009 02:09:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=beta; h=domainkey-signature:received:received:x-sender:x-apparently-to :received:received:received-spf:authentication-results:received :received:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references:x-sa-exim-connect-ip:x-sa-exim-mail-from :x-sa-exim-scanned:x-ptx-original-recipient:reply-to:sender :precedence:x-google-loop:mailing-list:list-id:list-post:list-help :list-unsubscribe:x-beenthere-env:x-beenthere; bh=1b0VuL8izTlVIXtiEHs/uTzafWMzyMpLByjq7SeU0hQ=; b=hGdqWcSQnC+677FyT+GXwletid3ty4HJYsBsq8w/qrBXQR2hici4+Kg1aG5PkeMy03 exqvtkXLvB7cuQBpzoOK/6OG/qMtEkKa2nRJCnbA2peL4CU90DD33OKNT7KqHvaNxtaV x2hiBgmc9nGph5MGiOktiqUbJXIH49Kq9MmTw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlegroups.com; s=beta; h=x-sender:x-apparently-to:received-spf:authentication-results:from :to:cc:subject:date:message-id:x-mailer:in-reply-to:references :x-sa-exim-connect-ip:x-sa-exim-mail-from:x-sa-exim-scanned :x-ptx-original-recipient:reply-to:sender:precedence:x-google-loop :mailing-list:list-id:list-post:list-help:list-unsubscribe :x-beenthere-env:x-beenthere; b=ngXPyhO4N+WWa9Qc0FrDGzAI9+0FnwKoddegiFjLfzWrR1LLy1lBrXiXDTShgirb+i NhnqoxXes9nVAMyb+44RMZHsHB4PeYHemzZ4EJrRxUnhomt5cg7yq98LUUoJcjq8sc3R aMyPlxCusPttVPtmGVZh6OWxPnIoh0lQ9Dp+s= Received: by 10.150.143.19 with SMTP id q19mr1515547ybd.2.1249981774670; Tue, 11 Aug 2009 02:09:34 -0700 (PDT) Received: by 10.176.94.14 with SMTP id r14gr2733yqb.0; Tue, 11 Aug 2009 02:09:34 -0700 (PDT) X-Sender: sha@pengutronix.de X-Apparently-To: rtc-linux@googlegroups.com Received: by 10.223.104.74 with SMTP id n10mr266798fao.9.1249981310176; Tue, 11 Aug 2009 02:01:50 -0700 (PDT) Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [92.198.50.35]) by gmr-mx.google.com with ESMTP id 13si842995fxm.4.2009.08.11.02.01.50; Tue, 11 Aug 2009 02:01:50 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of sha@pengutronix.de designates 92.198.50.35 as permitted sender) client-ip=92.198.50.35; Authentication-Results: gmr-mx.google.com; spf=pass (google.com: best guess record for domain of sha@pengutronix.de designates 92.198.50.35 as permitted sender) smtp.mail=sha@pengutronix.de Received: from octopus.hi.pengutronix.de ([2001:6f8:1178:2:215:17ff:fe12:23b0]) by metis.ext.pengutronix.de with esmtp (Exim 4.63) (envelope-from ) id 1ManCb-00070H-6a; Tue, 11 Aug 2009 10:59:29 +0200 Received: from sha by octopus.hi.pengutronix.de with local (Exim 4.69) (envelope-from ) id 1ManCa-00016g-Cr; Tue, 11 Aug 2009 10:59:28 +0200 From: Sascha Hauer To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.arm.linux.org.uk, Sascha Hauer , Paul Gortmaker , Alessandro Zummo , rtc-linux@googlegroups.com Subject: [rtc-linux] [PATCH 4/5] [RTC] Add Freescale MC13783 RTC driver Date: Tue, 11 Aug 2009 10:59:25 +0200 Message-Id: <1249981166-4210-4-git-send-email-s.hauer@pengutronix.de> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1249981166-4210-3-git-send-email-s.hauer@pengutronix.de> References: <1249981166-4210-1-git-send-email-s.hauer@pengutronix.de> <1249981166-4210-2-git-send-email-s.hauer@pengutronix.de> <1249981166-4210-3-git-send-email-s.hauer@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:215:17ff:fe12:23b0 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: rtc-linux@googlegroups.com Reply-To: rtc-linux@googlegroups.com Sender: rtc-linux@googlegroups.com Precedence: bulk X-Google-Loop: groups Mailing-List: list rtc-linux@googlegroups.com; contact rtc-linux+owner@googlegroups.com List-Id: List-Post: List-Help: List-Unsubscribe: , X-BeenThere-Env: rtc-linux@googlegroups.com X-BeenThere: rtc-linux@googlegroups.com This driver provides support for the RTC part integrated into the Freescale MC13783 PMIC. Signed-off-by: Sascha Hauer Cc: Paul Gortmaker Cc: Alessandro Zummo Cc: rtc-linux@googlegroups.com --- drivers/rtc/Kconfig | 6 ++ drivers/rtc/Makefile | 1 + drivers/rtc/rtc-mc13783.c | 141 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 148 insertions(+), 0 deletions(-) create mode 100644 drivers/rtc/rtc-mc13783.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 81adbdb..e4a242f 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -759,4 +759,10 @@ config RTC_DRV_PS3 This driver can also be built as a module. If so, the module will be called rtc-ps3. +config RTC_DRV_MC13783 + depends on MFD_MC13783 + tristate "Freescale MC13783 RTC" + help + This enables support for the Freescale MC13783 PMIC RTC + endif # RTC_CLASS diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 3c0f2b2..00bf66d 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -78,3 +78,4 @@ obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o +obj-$(CONFIG_RTC_DRV_MC13783) += rtc-mc13783.o diff --git a/drivers/rtc/rtc-mc13783.c b/drivers/rtc/rtc-mc13783.c new file mode 100644 index 0000000..d1f1192 --- /dev/null +++ b/drivers/rtc/rtc-mc13783.c @@ -0,0 +1,141 @@ +/* + * Real Time Clock driver for Freescale MC13783 PMIC + * + * (C) 2009 Sascha Hauer, Pengutronix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct mc13783_rtc { + struct rtc_device *rtc; + struct mc13783 *mc13783; +}; + +static int mc13783_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct mc13783_rtc *priv = dev_get_drvdata(dev); + unsigned int seconds, days; + unsigned long s1970; + + rtc_tm_to_time(tm, &s1970); + + seconds = s1970 % 86400; + days = s1970 / 86400; + + mc13783_reg_write(priv->mc13783, MC13783_REG_RTC_TIME, seconds); + mc13783_reg_write(priv->mc13783, MC13783_REG_RTC_DAY, days); + + return 0; +} + +static int mc13783_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct mc13783_rtc *priv = dev_get_drvdata(dev); + unsigned int seconds, days1, days2; + unsigned long s1970; + + rtc_tm_to_time(tm, &s1970); + + do { + mc13783_reg_read(priv->mc13783, MC13783_REG_RTC_TIME, &seconds); + mc13783_reg_read(priv->mc13783, MC13783_REG_RTC_DAY, &days1); + mc13783_reg_read(priv->mc13783, MC13783_REG_RTC_DAY, &days2); + } while (days1 != days2); + + s1970 = days1 * 86400 + seconds; + + rtc_time_to_tm(s1970, tm); + + return 0; +} + +static const struct rtc_class_ops mc13783_rtc_ops = { + .read_time = mc13783_rtc_read_time, + .set_time = mc13783_rtc_set_time, +}; + +static int mc13783_rtc_probe(struct platform_device *pdev) +{ + int err; + struct mc13783_rtc *priv; + + priv = kzalloc(sizeof *priv, GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->mc13783 = pdev->dev.platform_data; + platform_set_drvdata(pdev, priv); + + priv->rtc = rtc_device_register(pdev->name, + &pdev->dev, &mc13783_rtc_ops, THIS_MODULE); + + if (IS_ERR(priv->rtc)) { + err = PTR_ERR(priv->rtc); + goto exit_kfree; + } + + return 0; + +exit_kfree: + kfree(priv); + return err; +} + +static int __exit mc13783_rtc_remove(struct platform_device *pdev) +{ + struct mc13783_rtc *priv = platform_get_drvdata(pdev); + + rtc_device_unregister(priv->rtc); + platform_set_drvdata(pdev, NULL); + + kfree(priv); + + return 0; +} + +static struct platform_driver mc13783_rtc_driver = { + .probe = mc13783_rtc_probe, + .remove = __exit_p(mc13783_rtc_remove), + .driver = { + .name = "mc13783-rtc", + .owner = THIS_MODULE, + }, +}; + +static int __init mc13783_rtc_init(void) +{ + return platform_driver_register(&mc13783_rtc_driver); +} +module_init(mc13783_rtc_init); + +static void __exit mc13783_rtc_exit(void) +{ + platform_driver_unregister(&mc13783_rtc_driver); +} +module_exit(mc13783_rtc_exit); + + +MODULE_AUTHOR("Sascha Hauer"); +MODULE_DESCRIPTION("RTC driver for Freescale MC13783 PMIC"); +MODULE_LICENSE("GPL");