diff options
Diffstat (limited to 'drivers/rtc/rtc-spear.c')
| -rw-r--r-- | drivers/rtc/rtc-spear.c | 64 |
1 files changed, 26 insertions, 38 deletions
diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c index e377f42abae7..959acff8faff 100644 --- a/drivers/rtc/rtc-spear.c +++ b/drivers/rtc/rtc-spear.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * drivers/rtc/rtc-spear.c * * Copyright (C) 2010 ST Microelectronics * Rajeev Kumar<rajeev-dlh.kumar@st.com> - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. */ #include <linux/bcd.h> @@ -153,12 +150,12 @@ static void rtc_wait_not_busy(struct spear_rtc_config *config) static irqreturn_t spear_rtc_irq(int irq, void *dev_id) { struct spear_rtc_config *config = dev_id; - unsigned long flags, events = 0; + unsigned long events = 0; unsigned int irq_data; - spin_lock_irqsave(&config->lock, flags); + spin_lock(&config->lock); irq_data = readl(config->ioaddr + STATUS_REG); - spin_unlock_irqrestore(&config->lock, flags); + spin_unlock(&config->lock); if ((irq_data & RTC_INT_MASK)) { spear_rtc_clear_interrupt(config); @@ -170,18 +167,14 @@ static irqreturn_t spear_rtc_irq(int irq, void *dev_id) } -static int tm2bcd(struct rtc_time *tm) +static void tm2bcd(struct rtc_time *tm) { - if (rtc_valid_tm(tm) != 0) - return -EINVAL; tm->tm_sec = bin2bcd(tm->tm_sec); tm->tm_min = bin2bcd(tm->tm_min); tm->tm_hour = bin2bcd(tm->tm_hour); tm->tm_mday = bin2bcd(tm->tm_mday); tm->tm_mon = bin2bcd(tm->tm_mon + 1); tm->tm_year = bin2bcd(tm->tm_year); - - return 0; } static void bcd2tm(struct rtc_time *tm) @@ -211,8 +204,10 @@ static int spear_rtc_read_time(struct device *dev, struct rtc_time *tm) /* we don't report wday/yday/isdst ... */ rtc_wait_not_busy(config); - time = readl(config->ioaddr + TIME_REG); - date = readl(config->ioaddr + DATE_REG); + do { + time = readl(config->ioaddr + TIME_REG); + date = readl(config->ioaddr + DATE_REG); + } while (time == readl(config->ioaddr + TIME_REG)); tm->tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK; tm->tm_min = (time >> MINUTE_SHIFT) & MIN_MASK; tm->tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK; @@ -237,8 +232,7 @@ static int spear_rtc_set_time(struct device *dev, struct rtc_time *tm) struct spear_rtc_config *config = dev_get_drvdata(dev); unsigned int time, date; - if (tm2bcd(tm) < 0) - return -EINVAL; + tm2bcd(tm); rtc_wait_not_busy(config); time = (tm->tm_sec << SECOND_SHIFT) | (tm->tm_min << MINUTE_SHIFT) | @@ -295,8 +289,7 @@ static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) unsigned int time, date; int err; - if (tm2bcd(&alm->time) < 0) - return -EINVAL; + tm2bcd(&alm->time); rtc_wait_not_busy(config); @@ -353,7 +346,6 @@ static const struct rtc_class_ops spear_rtc_ops = { static int spear_rtc_probe(struct platform_device *pdev) { - struct resource *res; struct spear_rtc_config *config; int status = 0; int irq; @@ -362,12 +354,14 @@ static int spear_rtc_probe(struct platform_device *pdev) if (!config) return -ENOMEM; + config->rtc = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(config->rtc)) + return PTR_ERR(config->rtc); + /* alarm irqs */ irq = platform_get_irq(pdev, 0); - if (irq < 0) { - dev_err(&pdev->dev, "no update irq?\n"); + if (irq < 0) return irq; - } status = devm_request_irq(&pdev->dev, irq, spear_rtc_irq, 0, pdev->name, config); @@ -377,8 +371,7 @@ static int spear_rtc_probe(struct platform_device *pdev) return status; } - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - config->ioaddr = devm_ioremap_resource(&pdev->dev, res); + config->ioaddr = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(config->ioaddr)) return PTR_ERR(config->ioaddr); @@ -393,19 +386,16 @@ static int spear_rtc_probe(struct platform_device *pdev) spin_lock_init(&config->lock); platform_set_drvdata(pdev, config); - config->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, - &spear_rtc_ops, THIS_MODULE); - if (IS_ERR(config->rtc)) { - dev_err(&pdev->dev, "can't register RTC device, err %ld\n", - PTR_ERR(config->rtc)); - status = PTR_ERR(config->rtc); - goto err_disable_clock; - } + config->rtc->ops = &spear_rtc_ops; + config->rtc->range_min = RTC_TIMESTAMP_BEGIN_0000; + config->rtc->range_max = RTC_TIMESTAMP_END_9999; - config->rtc->uie_unsupported = 1; + status = devm_rtc_register_device(config->rtc); + if (status) + goto err_disable_clock; if (!device_can_wakeup(&pdev->dev)) - device_init_wakeup(&pdev->dev, 1); + device_init_wakeup(&pdev->dev, true); return 0; @@ -415,15 +405,13 @@ err_disable_clock: return status; } -static int spear_rtc_remove(struct platform_device *pdev) +static void spear_rtc_remove(struct platform_device *pdev) { struct spear_rtc_config *config = platform_get_drvdata(pdev); spear_rtc_disable_interrupt(config); clk_disable_unprepare(config->clk); - device_init_wakeup(&pdev->dev, 0); - - return 0; + device_init_wakeup(&pdev->dev, false); } #ifdef CONFIG_PM_SLEEP |