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path: root/drivers/rtc/rtc-nuc900.c
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Diffstat (limited to 'drivers/rtc/rtc-nuc900.c')
-rw-r--r--drivers/rtc/rtc-nuc900.c150
1 files changed, 41 insertions, 109 deletions
diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c
index bf59c9c586b..a53da0958e9 100644
--- a/drivers/rtc/rtc-nuc900.c
+++ b/drivers/rtc/rtc-nuc900.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
+#include <linux/slab.h>
#include <linux/rtc.h>
#include <linux/delay.h>
#include <linux/io.h>
@@ -84,25 +85,24 @@ static irqreturn_t nuc900_rtc_interrupt(int irq, void *_rtc)
static int *check_rtc_access_enable(struct nuc900_rtc *nuc900_rtc)
{
- unsigned int i;
+ unsigned int timeout = 0x1000;
__raw_writel(INIRRESET, nuc900_rtc->rtc_reg + REG_RTC_INIR);
mdelay(10);
__raw_writel(AERPOWERON, nuc900_rtc->rtc_reg + REG_RTC_AER);
- for (i = 0; i < 1000; i++) {
- if (__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_AER) & AERRWENB)
- return 0;
- }
+ while (!(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_AER) & AERRWENB)
+ && timeout--)
+ mdelay(1);
- if ((__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_AER) & AERRWENB) == 0x0)
- return ERR_PTR(-ENODEV);
+ if (!timeout)
+ return ERR_PTR(-EPERM);
- return ERR_PTR(-EPERM);
+ return NULL;
}
-static void nuc900_rtc_bcd2bin(unsigned int timereg,
+static int nuc900_rtc_bcd2bin(unsigned int timereg,
unsigned int calreg, struct rtc_time *tm)
{
tm->tm_mday = bcd2bin(calreg >> 0);
@@ -113,35 +113,27 @@ static void nuc900_rtc_bcd2bin(unsigned int timereg,
tm->tm_min = bcd2bin(timereg >> 8);
tm->tm_hour = bcd2bin(timereg >> 16);
- rtc_valid_tm(tm);
+ return rtc_valid_tm(tm);
}
-static void nuc900_rtc_bin2bcd(struct rtc_time *settm,
+static void nuc900_rtc_bin2bcd(struct device *dev, struct rtc_time *settm,
struct nuc900_bcd_time *gettm)
{
gettm->bcd_mday = bin2bcd(settm->tm_mday) << 0;
gettm->bcd_mon = bin2bcd(settm->tm_mon) << 8;
- gettm->bcd_year = bin2bcd(settm->tm_year - 100) << 16;
+
+ if (settm->tm_year < 100) {
+ dev_warn(dev, "The year will be between 1970-1999, right?\n");
+ gettm->bcd_year = bin2bcd(settm->tm_year) << 16;
+ } else {
+ gettm->bcd_year = bin2bcd(settm->tm_year - 100) << 16;
+ }
gettm->bcd_sec = bin2bcd(settm->tm_sec) << 0;
gettm->bcd_min = bin2bcd(settm->tm_min) << 8;
gettm->bcd_hour = bin2bcd(settm->tm_hour) << 16;
}
-static int nuc900_update_irq_enable(struct device *dev, unsigned int enabled)
-{
- struct nuc900_rtc *rtc = dev_get_drvdata(dev);
-
- if (enabled)
- __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)|
- (TICKINTENB), rtc->rtc_reg + REG_RTC_RIER);
- else
- __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)&
- (~TICKINTENB), rtc->rtc_reg + REG_RTC_RIER);
-
- return 0;
-}
-
static int nuc900_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct nuc900_rtc *rtc = dev_get_drvdata(dev);
@@ -164,9 +156,7 @@ static int nuc900_rtc_read_time(struct device *dev, struct rtc_time *tm)
timeval = __raw_readl(rtc->rtc_reg + REG_RTC_TLR);
clrval = __raw_readl(rtc->rtc_reg + REG_RTC_CLR);
- nuc900_rtc_bcd2bin(timeval, clrval, tm);
-
- return 0;
+ return nuc900_rtc_bcd2bin(timeval, clrval, tm);
}
static int nuc900_rtc_set_time(struct device *dev, struct rtc_time *tm)
@@ -176,7 +166,7 @@ static int nuc900_rtc_set_time(struct device *dev, struct rtc_time *tm)
unsigned long val;
int *err;
- nuc900_rtc_bin2bcd(tm, &gettm);
+ nuc900_rtc_bin2bcd(dev, tm, &gettm);
err = check_rtc_access_enable(rtc);
if (IS_ERR(err))
@@ -199,9 +189,7 @@ static int nuc900_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
timeval = __raw_readl(rtc->rtc_reg + REG_RTC_TAR);
carval = __raw_readl(rtc->rtc_reg + REG_RTC_CAR);
- nuc900_rtc_bcd2bin(timeval, carval, &alrm->time);
-
- return 0;
+ return nuc900_rtc_bcd2bin(timeval, carval, &alrm->time);
}
static int nuc900_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
@@ -211,7 +199,7 @@ static int nuc900_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
unsigned long val;
int *err;
- nuc900_rtc_bin2bcd(&alrm->time, &tm);
+ nuc900_rtc_bin2bcd(dev, &alrm->time, &tm);
err = check_rtc_access_enable(rtc);
if (IS_ERR(err))
@@ -232,109 +220,53 @@ static struct rtc_class_ops nuc900_rtc_ops = {
.read_alarm = nuc900_rtc_read_alarm,
.set_alarm = nuc900_rtc_set_alarm,
.alarm_irq_enable = nuc900_alarm_irq_enable,
- .update_irq_enable = nuc900_update_irq_enable,
};
-static int __devinit nuc900_rtc_probe(struct platform_device *pdev)
+static int __init nuc900_rtc_probe(struct platform_device *pdev)
{
struct resource *res;
struct nuc900_rtc *nuc900_rtc;
- int err = 0;
- nuc900_rtc = kzalloc(sizeof(struct nuc900_rtc), GFP_KERNEL);
- if (!nuc900_rtc) {
- dev_err(&pdev->dev, "kzalloc nuc900_rtc failed\n");
+ nuc900_rtc = devm_kzalloc(&pdev->dev, sizeof(struct nuc900_rtc),
+ GFP_KERNEL);
+ if (!nuc900_rtc)
return -ENOMEM;
- }
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "platform_get_resource failed\n");
- err = -ENXIO;
- goto fail1;
- }
-
- if (!request_mem_region(res->start, resource_size(res),
- pdev->name)) {
- dev_err(&pdev->dev, "request_mem_region failed\n");
- err = -EBUSY;
- goto fail1;
- }
- nuc900_rtc->rtc_reg = ioremap(res->start, resource_size(res));
- if (!nuc900_rtc->rtc_reg) {
- dev_err(&pdev->dev, "ioremap rtc_reg failed\n");
- err = -ENOMEM;
- goto fail2;
- }
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ nuc900_rtc->rtc_reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(nuc900_rtc->rtc_reg))
+ return PTR_ERR(nuc900_rtc->rtc_reg);
- nuc900_rtc->irq_num = platform_get_irq(pdev, 0);
- if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt,
- IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) {
- dev_err(&pdev->dev, "NUC900 RTC request irq failed\n");
- err = -EBUSY;
- goto fail3;
- }
+ platform_set_drvdata(pdev, nuc900_rtc);
- nuc900_rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev,
+ nuc900_rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name,
&nuc900_rtc_ops, THIS_MODULE);
if (IS_ERR(nuc900_rtc->rtcdev)) {
- dev_err(&pdev->dev, "rtc device register faild\n");
- err = PTR_ERR(nuc900_rtc->rtcdev);
- goto fail4;
+ dev_err(&pdev->dev, "rtc device register failed\n");
+ return PTR_ERR(nuc900_rtc->rtcdev);
}
- platform_set_drvdata(pdev, nuc900_rtc);
__raw_writel(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_TSSR) | MODE24,
nuc900_rtc->rtc_reg + REG_RTC_TSSR);
- return 0;
-
-fail4: free_irq(nuc900_rtc->irq_num, nuc900_rtc);
-fail3: iounmap(nuc900_rtc->rtc_reg);
-fail2: release_mem_region(res->start, resource_size(res));
-fail1: kfree(nuc900_rtc);
- return err;
-}
-
-static int __devexit nuc900_rtc_remove(struct platform_device *pdev)
-{
- struct nuc900_rtc *nuc900_rtc = platform_get_drvdata(pdev);
- struct resource *res;
-
- rtc_device_unregister(nuc900_rtc->rtcdev);
- free_irq(nuc900_rtc->irq_num, nuc900_rtc);
- iounmap(nuc900_rtc->rtc_reg);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
- kfree(nuc900_rtc);
-
- platform_set_drvdata(pdev, NULL);
+ nuc900_rtc->irq_num = platform_get_irq(pdev, 0);
+ if (devm_request_irq(&pdev->dev, nuc900_rtc->irq_num,
+ nuc900_rtc_interrupt, 0, "nuc900rtc", nuc900_rtc)) {
+ dev_err(&pdev->dev, "NUC900 RTC request irq failed\n");
+ return -EBUSY;
+ }
return 0;
}
static struct platform_driver nuc900_rtc_driver = {
- .remove = __devexit_p(nuc900_rtc_remove),
.driver = {
.name = "nuc900-rtc",
.owner = THIS_MODULE,
},
};
-static int __init nuc900_rtc_init(void)
-{
- return platform_driver_probe(&nuc900_rtc_driver, nuc900_rtc_probe);
-}
-
-static void __exit nuc900_rtc_exit(void)
-{
- platform_driver_unregister(&nuc900_rtc_driver);
-}
-
-module_init(nuc900_rtc_init);
-module_exit(nuc900_rtc_exit);
+module_platform_driver_probe(nuc900_rtc_driver, nuc900_rtc_probe);
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("nuc910/nuc920 RTC driver");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 13:35:08 +0000