From patchwork Sun Aug 5 20:43:43 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anthony Olech X-Patchwork-Id: 175276 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from mail-wg0-f56.google.com (mail-wg0-f56.google.com [74.125.82.56]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 2C76B2C0092 for ; Mon, 6 Aug 2012 17:41:31 +1000 (EST) Received: by wgbds11 with SMTP id ds11sf996232wgb.11 for ; Mon, 06 Aug 2012 00:41:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=beta; h=mime-version:x-beenthere:received-spf:message-id:from:date:subject :to:cc:cc:cc:cc:cc:cc:cc:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-google-group-id:list-post:list-help:list-archive:sender :list-subscribe:list-unsubscribe:content-type; bh=WSHEmntXX7NarbxQMEVmNTLH0qJaQxN44JncDM1v1WQ=; b=lG7BQ8N09ZB6VWTiTZ3Uew8EsM4/oJCurIBJe3KE5f+Zw9G2w8G3rOpJW9ofAp+iCh b0Hnjr+fBU44JoXPwbhV9APCKdL1WGoTENXh4mfSrsticax5dDLmBC9fuykvLS4hC5dV /D9mwg4NzUTLKCj0MHc/ipGZFyfCK3X7InU8o= Received: by 10.216.51.8 with SMTP id a8mr105032wec.85.1344238888339; Mon, 06 Aug 2012 00:41:28 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: rtc-linux@googlegroups.com Received: by 10.216.200.203 with SMTP id z53ls5770044wen.5.gmail; Mon, 06 Aug 2012 00:41:27 -0700 (PDT) Received: by 10.180.95.2 with SMTP id dg2mr982576wib.2.1344238887726; Mon, 06 Aug 2012 00:41:27 -0700 (PDT) Received: by 10.180.95.2 with SMTP id dg2mr982575wib.2.1344238887716; Mon, 06 Aug 2012 00:41:27 -0700 (PDT) Received: from mailrelay1.diasemi.com (mailrelay1.diasemi.com. [82.210.246.133]) by gmr-mx.google.com with ESMTP id cd1si1639344wib.1.2012.08.06.00.41.27; Mon, 06 Aug 2012 00:41:27 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of anthony.olech.opensource@diasemi.com designates 82.210.246.133 as permitted sender) client-ip=82.210.246.133; Received: from ubuntu (Not Verified[10.20.27.23]) by mailrelay1.diasemi.com with ESMTP Gateway id ; Mon, 06 Aug 2012 09:41:27 +0200 Received: from ubuntu (localhost [127.0.0.1]) by ubuntu (8.14.4/8.14.4/Debian-2ubuntu2) with ESMTP id q767djr6005729; Mon, 6 Aug 2012 08:39:45 +0100 Received: (from root@localhost) by ubuntu (8.14.4/8.14.4/Submit) id q767djnO005723; Mon, 6 Aug 2012 08:39:45 +0100 Message-Id: <201208060739.q767djnO005723@ubuntu> From: Anthony Olech Date: Sun, 5 Aug 2012 21:43:43 +0100 Subject: [rtc-linux] [NEW DRIVER V2 4/7] DA9058 RTC driver To: Andrew Morton Cc: Mark Brown Cc: Paul Gortmaker Cc: Samuel Ortiz Cc: Alessandro Zummo Cc: rtc-linux@googlegroups.com Cc: LKML Cc: David Dajun Chen X-Original-Sender: anthony.olech.opensource@diasemi.com X-Original-Authentication-Results: gmr-mx.google.com; spf=pass (google.com: best guess record for domain of anthony.olech.opensource@diasemi.com designates 82.210.246.133 as permitted sender) smtp.mail=anthony.olech.opensource@diasemi.com Reply-To: rtc-linux@googlegroups.com Precedence: list Mailing-list: list rtc-linux@googlegroups.com; contact rtc-linux+owners@googlegroups.com List-ID: X-Google-Group-Id: 712029733259 List-Post: , List-Help: , List-Archive: Sender: rtc-linux@googlegroups.com List-Subscribe: , List-Unsubscribe: , This is the RTC component driver of the Dialog DA9058 PMIC. This driver is just one component of the whole DA9058 PMIC driver. It depends on the core DA9058 MFD driver. Signed-off-by: Anthony Olech Signed-off-by: David Dajun Chen --- drivers/rtc/Kconfig | 10 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-da9058.c | 446 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 457 insertions(+), 0 deletions(-) create mode 100644 drivers/rtc/rtc-da9058.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 08cbdb9..21f5630 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -135,6 +135,16 @@ config RTC_DRV_88PM860X This driver can also be built as a module. If so, the module will be called rtc-88pm860x. +config RTC_DRV_DA9058 + tristate "Dialog DA9058" + depends on MFD_DA9058 + help + If you say yes here you will get support for the + RTC of the Dialog DA9058 PMIC. + + This driver can also be built as a module. If so, the module + will be called rtc-da9058. + config RTC_DRV_DS1307 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025" help diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 2973921..b772f05 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o obj-$(CONFIG_RTC_DRV_DAVINCI) += rtc-davinci.o +obj-$(CONFIG_RTC_DRV_DA9058) += rtc-da9058.o obj-$(CONFIG_RTC_DRV_DM355EVM) += rtc-dm355evm.o obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o diff --git a/drivers/rtc/rtc-da9058.c b/drivers/rtc/rtc-da9058.c new file mode 100644 index 0000000..c981900 --- /dev/null +++ b/drivers/rtc/rtc-da9058.c @@ -0,0 +1,446 @@ +/* + * Copyright (C) 2012 Dialog Semiconductor Ltd. + * + * 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. + * + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +/* + * Limit values + */ +#define DA9058_RTC_SECONDS_LIMIT 59 +#define DA9058_RTC_MINUTES_LIMIT 59 +#define DA9058_RTC_HOURS_LIMIT 23 +#define DA9058_RTC_DAYS_LIMIT 31 +#define DA9058_RTC_MONTHS_LIMIT 12 +#define DA9058_RTC_YEARS_LIMIT 63 + +struct da9058_rtc { + struct da9058 *da9058; + struct platform_device *pdev; + struct rtc_device *rtc_dev; + int alarm_irq; + int tick_irq; + int alarm_enabled; /* used over suspend/resume */ +}; + +static int da9058_rtc_check_param(struct rtc_time *rtc_tm) +{ + if ((rtc_tm->tm_sec > DA9058_RTC_SECONDS_LIMIT) || (rtc_tm->tm_sec < 0)) + return -EIO; + + if ((rtc_tm->tm_min > DA9058_RTC_MINUTES_LIMIT) || (rtc_tm->tm_min < 0)) + return -EIO; + + if ((rtc_tm->tm_hour > DA9058_RTC_HOURS_LIMIT) || (rtc_tm->tm_hour < 0)) + return -EIO; + + if (rtc_tm->tm_mday == 0) + return -EIO; + + if ((rtc_tm->tm_mon > DA9058_RTC_MONTHS_LIMIT) || (rtc_tm->tm_mon <= 0)) + return -EIO; + + if ((rtc_tm->tm_year > DA9058_RTC_YEARS_LIMIT) || (rtc_tm->tm_year < 0)) + return -EIO; + + return 0; +} + +static int da9058_rtc_readtime(struct device *dev, struct rtc_time *tm) +{ + struct da9058_rtc *rtc = dev_get_drvdata(dev); + struct da9058 *da9058 = rtc->da9058; + unsigned int rtc_time[6]; + int ret; + + ret = da9058_bulk_read(da9058, DA9058_COUNTS_REG, rtc_time, 6); + if (ret) + return ret; + + tm->tm_sec = rtc_time[0] & DA9058_RTC_SECS_MASK; + + tm->tm_min = rtc_time[1] & DA9058_RTC_MINS_MASK; + + tm->tm_hour = rtc_time[2] & DA9058_RTC_HRS_MASK; + + tm->tm_mday = (rtc_time[3] & DA9058_RTC_DAY_MASK); + + tm->tm_mon = (rtc_time[4] & DA9058_RTC_MTH_MASK); + + tm->tm_year = (rtc_time[5] & DA9058_RTC_YRS_MASK); + + ret = da9058_rtc_check_param(tm); + + if (ret) + return ret; + + tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, + tm->tm_year); + tm->tm_year += 100; + tm->tm_mon -= 1; + + return 0; +} + +static int da9058_rtc_settime(struct device *dev, struct rtc_time *tm) +{ + struct da9058_rtc *rtc = dev_get_drvdata(dev); + struct da9058 *da9058 = rtc->da9058; + unsigned int rtc_ctrl, val, rtc_time[6]; + int ret; + + tm->tm_year -= 111; + tm->tm_mon += 1; + + ret = da9058_rtc_check_param(tm); + if (ret < 0) + return ret; + + ret = da9058_reg_read(da9058, DA9058_COUNTS_REG, &rtc_ctrl); + if (ret) + return ret; + rtc_ctrl &= ~DA9058_RTC_SECS_MASK; + + rtc_time[0] = rtc_ctrl | tm->tm_sec; + rtc_time[1] = tm->tm_min; + rtc_time[2] = tm->tm_hour; + rtc_time[3] = tm->tm_mday; + rtc_time[4] = tm->tm_mon; + rtc_time[5] = tm->tm_year; + + ret = da9058_bulk_write(da9058, DA9058_COUNTS_REG, rtc_time, 6); + if (ret) { + dev_dbg(dev, "failed %d to write to RTC\n", ret); + return ret; + } + ret = da9058_reg_read(da9058, DA9058_COUNTY_REG, &val); + if (ret) + return ret; + + val &= DA9058_COUNTY_MONITOR; + if (val) + return 0; + + ret = da9058_set_bits(da9058, DA9058_COUNTY_REG, DA9058_COUNTY_MONITOR); + + return ret; +} + +static int da9058_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct da9058_rtc *rtc = dev_get_drvdata(dev); + struct da9058 *da9058 = rtc->da9058; + struct rtc_time *tm = &alrm->time; + unsigned int alm_time[6], val; + int ret; + + ret = da9058_bulk_read(da9058, DA9058_ALARMS_REG, alm_time, 6); + if (ret) + return ret; + + tm->tm_min = alm_time[0] & DA9058_RTC_ALMSECS_MASK; + + tm->tm_min = alm_time[1] & DA9058_RTC_ALMMINS_MASK; + + tm->tm_hour = alm_time[2] & DA9058_RTC_ALMHRS_MASK; + + tm->tm_mday = alm_time[3] & DA9058_RTC_ALMDAY_MASK; + + tm->tm_mon = alm_time[4] & DA9058_RTC_ALMMTH_MASK; + + tm->tm_year = alm_time[5] & DA9058_RTC_ALMYRS_MASK; + + ret = da9058_rtc_check_param(tm); + if (ret < 0) + return ret; + + ret = da9058_reg_read(da9058, DA9058_ALARMY_REG, &val); + if (ret) + return ret; + + alrm->enabled = val & DA9058_ALARMY_ALARMON; + + tm->tm_year += 100; + tm->tm_mon -= 1; + + return 0; +} + +static int da9058_rtc_stop_alarm(struct da9058_rtc *rtc) +{ + return da9058_clear_bits(rtc->da9058, DA9058_ALARMY_REG, + DA9058_ALARMY_ALARMON); +} + +static int da9058_rtc_start_alarm(struct da9058_rtc *rtc) +{ + return da9058_set_bits(rtc->da9058, DA9058_ALARMY_REG, + DA9058_ALARMY_ALARMON); +} + +static int da9058_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct da9058_rtc *rtc = dev_get_drvdata(dev); + struct da9058 *da9058 = rtc->da9058; + struct rtc_time *tm = &alrm->time; + unsigned int alm_time[6], rtc_ctrl; + int ret; + + tm->tm_year -= 100; + tm->tm_mon += 1; + + ret = da9058_rtc_check_param(tm); + if (ret < 0) + return ret; + + memset(alm_time, 0, sizeof(alm_time)); + + if (tm->tm_sec != -1) + alm_time[0] |= tm->tm_sec; + else + alm_time[0] |= DA9058_RTC_ALMSECS_MASK; + + ret = da9058_reg_read(da9058, DA9058_ALARMMI_REG, &rtc_ctrl); + if (ret) + return ret; + rtc_ctrl &= ~DA9058_RTC_ALMMINS_MASK; + + if (tm->tm_min != -1) + alm_time[1] = rtc_ctrl | tm->tm_min; + else + alm_time[1] = rtc_ctrl | DA9058_RTC_ALMMINS_MASK; + + if (tm->tm_hour != -1) + alm_time[2] |= tm->tm_hour; + else + alm_time[2] |= DA9058_RTC_ALMHRS_MASK; + + if (tm->tm_mday != -1) + alm_time[3] |= tm->tm_mday; + else + alm_time[3] |= DA9058_RTC_ALMDAY_MASK; + + if (tm->tm_mon != -1) + alm_time[4] |= tm->tm_mon; + else + alm_time[4] |= DA9058_RTC_ALMMTH_MASK; + + ret = da9058_reg_read(da9058, DA9058_ALARMY_REG, &rtc_ctrl); + if (ret) + return ret; + + rtc_ctrl &= ~DA9058_RTC_ALMYRS_MASK; + + if (tm->tm_year != -1) + alm_time[5] = rtc_ctrl | tm->tm_year; + else + alm_time[5] = rtc_ctrl | DA9058_RTC_ALMYRS_MASK; + + ret = da9058_rtc_stop_alarm(rtc); + if (ret < 0) + return ret; + + ret = da9058_bulk_write(da9058, DA9058_ALARMS_REG, alm_time, 6); + if (ret) + return ret; + + if (alrm->enabled) + ret = da9058_rtc_start_alarm(rtc); + + return ret; +} + +static int da9058_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct da9058_rtc *rtc = dev_get_drvdata(dev); + + if (enabled) + return da9058_rtc_start_alarm(rtc); + else + return da9058_rtc_stop_alarm(rtc); +} + +static irqreturn_t da9058_rtc_timer_alarm_handler(int irq, void *data) +{ + struct da9058_rtc *rtc = data; + + da9058_rtc_stop_alarm(rtc); + rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static irqreturn_t da9058_rtc_tick_alarm_handler(int irq, void *data) +{ + struct da9058_rtc *rtc = data; + + rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF); + + return IRQ_HANDLED; +} +static int da9058_rtc_proc(struct device *dev, struct seq_file *seq) +{ + struct da9058_rtc *rtc = dev_get_drvdata(dev); + struct da9058 *da9058 = rtc->da9058; + unsigned int rtc_ctrl; + int ret; + + ret = da9058_reg_read(da9058, DA9058_ALARMY_REG, &rtc_ctrl); + + seq_printf(seq, rtc_ctrl & DA9058_ALARMY_ALARMON ? + "ALRM is running\n" : "ALRM is not running\n"); + + return 0; +} + +static const struct rtc_class_ops da9058_rtc_ops = { + .read_time = da9058_rtc_readtime, + .set_time = da9058_rtc_settime, + .read_alarm = da9058_rtc_readalarm, + .set_alarm = da9058_rtc_setalarm, + .proc = da9058_rtc_proc, + .alarm_irq_enable = da9058_rtc_alarm_irq_enable, +}; + +static int da9058_rtc_probe(struct platform_device *pdev) +{ + struct da9058 *da9058 = dev_get_drvdata(pdev->dev.parent); + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct da9058_rtc_pdata *rtc_pdata; + struct da9058_rtc *rtc; + int ret; + + if (cell == NULL) { + ret = -ENODEV; + goto exit; + } + + rtc_pdata = cell->platform_data; + + if (rtc_pdata == NULL) { + ret = -EINVAL; + goto exit; + } + + rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9058_rtc), GFP_KERNEL); + if (!rtc) { + ret = -ENOMEM; + goto exit; + } + + platform_set_drvdata(pdev, rtc); + + rtc->da9058 = da9058; + rtc->pdev = pdev; + ret = da9058_clear_bits(da9058, DA9058_WAITCONT_REG, + DA9058_WAITCONT_RTCCLOCK); + if (ret) { + dev_err(&pdev->dev, "Failed to set RTC running: %d\n", ret); + goto err0; + } + + ret = da9058_set_bits(da9058, DA9058_COUNTY_REG, DA9058_COUNTY_MONITOR); + if (ret) { + dev_err(&pdev->dev, "Failed No gating RTC: %d\n", ret); + goto err1; + } + + device_init_wakeup(&pdev->dev, 1); + + rtc->rtc_dev = rtc_device_register("da9058", &pdev->dev, + &da9058_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc_dev)) { + ret = PTR_ERR(rtc->rtc_dev); + dev_err(&pdev->dev, "failed to register RTC: %d\n", ret); + goto err2; + } + + rtc->alarm_irq = DA9058_IRQ_EALRAM; + ret = request_threaded_irq(da9058_to_virt_irq_num(da9058, + rtc->alarm_irq), + NULL, da9058_rtc_timer_alarm_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "DA9058 RTC Timer Alarm", rtc); + + if (ret != 0) { + dev_err(&pdev->dev, + "Failed to get rtc timer alarm IRQ %d: %d\n", + rtc->alarm_irq, ret); + goto err3; + } + + rtc->tick_irq = DA9058_IRQ_ETICK; + ret = request_threaded_irq(da9058_to_virt_irq_num(da9058, + rtc->tick_irq), + NULL, da9058_rtc_tick_alarm_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "DA9058 RTC Tick Alarm", rtc); + if (ret) { + dev_err(&pdev->dev, + "Failed to get rtc timer alarm IRQ %d: %d\n", + DA9058_IRQ_ETICK, ret); + goto err4; + } + + ret = 0; + goto exit; + +err4: + free_irq(da9058_to_virt_irq_num(da9058, rtc->alarm_irq), rtc); +err3: +err2: + rtc_device_unregister(rtc->rtc_dev); +err1: +err0: + platform_set_drvdata(pdev, NULL); +exit: + return ret; +} + +static int __devexit da9058_rtc_remove(struct platform_device *pdev) +{ + struct da9058_rtc *rtc = platform_get_drvdata(pdev); + struct da9058 *da9058 = rtc->da9058; + + free_irq(da9058_to_virt_irq_num(da9058, rtc->alarm_irq), rtc); + free_irq(da9058_to_virt_irq_num(da9058, rtc->tick_irq), rtc); + + rtc_device_unregister(rtc->rtc_dev); + + return 0; +} + +static struct platform_driver da9058_rtc_driver = { + .probe = da9058_rtc_probe, + .remove = __devexit_p(da9058_rtc_remove), + .driver = { + .name = "da9058-rtc", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9058_rtc_driver); + +MODULE_DESCRIPTION("Dialog DA9058 PMIC Real Time Clock Driver"); +MODULE_AUTHOR("Anthony Olech "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:da9058-rtc");