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path: root/drivers/rtc/rtc-tx4939.c
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Diffstat (limited to 'drivers/rtc/rtc-tx4939.c')
-rw-r--r--drivers/rtc/rtc-tx4939.c88
1 files changed, 36 insertions, 52 deletions
diff --git a/drivers/rtc/rtc-tx4939.c b/drivers/rtc/rtc-tx4939.c
index 4a6ed1104fb..2e678c681b1 100644
--- a/drivers/rtc/rtc-tx4939.c
+++ b/drivers/rtc/rtc-tx4939.c
@@ -11,12 +11,15 @@
#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
+#include <linux/module.h>
#include <linux/io.h>
+#include <linux/gfp.h>
#include <asm/txx9/tx4939.h>
struct tx4939rtc_plat_data {
struct rtc_device *rtc;
struct tx4939_rtc_reg __iomem *rtcreg;
+ spinlock_t lock;
};
static struct tx4939rtc_plat_data *get_tx4939rtc_plat_data(struct device *dev)
@@ -52,14 +55,14 @@ static int tx4939_rtc_set_mmss(struct device *dev, unsigned long secs)
buf[3] = secs >> 8;
buf[4] = secs >> 16;
buf[5] = secs >> 24;
- spin_lock_irq(&pdata->rtc->irq_lock);
+ spin_lock_irq(&pdata->lock);
__raw_writel(0, &rtcreg->adr);
for (i = 0; i < 6; i++)
__raw_writel(buf[i], &rtcreg->dat);
ret = tx4939_rtc_cmd(rtcreg,
TX4939_RTCCTL_COMMAND_SETTIME |
(__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALME));
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
return ret;
}
@@ -71,18 +74,18 @@ static int tx4939_rtc_read_time(struct device *dev, struct rtc_time *tm)
unsigned long sec;
unsigned char buf[6];
- spin_lock_irq(&pdata->rtc->irq_lock);
+ spin_lock_irq(&pdata->lock);
ret = tx4939_rtc_cmd(rtcreg,
TX4939_RTCCTL_COMMAND_GETTIME |
(__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALME));
if (ret) {
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
return ret;
}
__raw_writel(2, &rtcreg->adr);
for (i = 2; i < 6; i++)
buf[i] = __raw_readl(&rtcreg->dat);
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
sec = (buf[5] << 24) | (buf[4] << 16) | (buf[3] << 8) | buf[2];
rtc_time_to_tm(sec, tm);
return rtc_valid_tm(tm);
@@ -110,13 +113,13 @@ static int tx4939_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
buf[3] = sec >> 8;
buf[4] = sec >> 16;
buf[5] = sec >> 24;
- spin_lock_irq(&pdata->rtc->irq_lock);
+ spin_lock_irq(&pdata->lock);
__raw_writel(0, &rtcreg->adr);
for (i = 0; i < 6; i++)
__raw_writel(buf[i], &rtcreg->dat);
ret = tx4939_rtc_cmd(rtcreg, TX4939_RTCCTL_COMMAND_SETALARM |
(alrm->enabled ? TX4939_RTCCTL_ALME : 0));
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
return ret;
}
@@ -129,12 +132,12 @@ static int tx4939_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
unsigned char buf[6];
u32 ctl;
- spin_lock_irq(&pdata->rtc->irq_lock);
+ spin_lock_irq(&pdata->lock);
ret = tx4939_rtc_cmd(rtcreg,
TX4939_RTCCTL_COMMAND_GETALARM |
(__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALME));
if (ret) {
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
return ret;
}
__raw_writel(2, &rtcreg->adr);
@@ -143,7 +146,7 @@ static int tx4939_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
ctl = __raw_readl(&rtcreg->ctl);
alrm->enabled = (ctl & TX4939_RTCCTL_ALME) ? 1 : 0;
alrm->pending = (ctl & TX4939_RTCCTL_ALMD) ? 1 : 0;
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
sec = (buf[5] << 24) | (buf[4] << 16) | (buf[3] << 8) | buf[2];
rtc_time_to_tm(sec, &alrm->time);
return rtc_valid_tm(&alrm->time);
@@ -153,11 +156,11 @@ static int tx4939_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct tx4939rtc_plat_data *pdata = get_tx4939rtc_plat_data(dev);
- spin_lock_irq(&pdata->rtc->irq_lock);
+ spin_lock_irq(&pdata->lock);
tx4939_rtc_cmd(pdata->rtcreg,
TX4939_RTCCTL_COMMAND_NOP |
(enabled ? TX4939_RTCCTL_ALME : 0));
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
return 0;
}
@@ -167,13 +170,14 @@ static irqreturn_t tx4939_rtc_interrupt(int irq, void *dev_id)
struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
unsigned long events = RTC_IRQF;
- spin_lock(&pdata->rtc->irq_lock);
+ spin_lock(&pdata->lock);
if (__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALMD) {
events |= RTC_AF;
tx4939_rtc_cmd(rtcreg, TX4939_RTCCTL_COMMAND_NOP);
}
- spin_unlock(&pdata->rtc->irq_lock);
+ spin_unlock(&pdata->lock);
rtc_update_irq(pdata->rtc, 1, events);
+
return IRQ_HANDLED;
}
@@ -185,7 +189,7 @@ static const struct rtc_class_ops tx4939_rtc_ops = {
.alarm_irq_enable = tx4939_rtc_alarm_irq_enable,
};
-static ssize_t tx4939_rtc_nvram_read(struct kobject *kobj,
+static ssize_t tx4939_rtc_nvram_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t size)
{
@@ -194,17 +198,17 @@ static ssize_t tx4939_rtc_nvram_read(struct kobject *kobj,
struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
ssize_t count;
- spin_lock_irq(&pdata->rtc->irq_lock);
+ spin_lock_irq(&pdata->lock);
for (count = 0; size > 0 && pos < TX4939_RTC_REG_RAMSIZE;
count++, size--) {
__raw_writel(pos++, &rtcreg->adr);
*buf++ = __raw_readl(&rtcreg->dat);
}
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
return count;
}
-static ssize_t tx4939_rtc_nvram_write(struct kobject *kobj,
+static ssize_t tx4939_rtc_nvram_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t size)
{
@@ -213,13 +217,13 @@ static ssize_t tx4939_rtc_nvram_write(struct kobject *kobj,
struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
ssize_t count;
- spin_lock_irq(&pdata->rtc->irq_lock);
+ spin_lock_irq(&pdata->lock);
for (count = 0; size > 0 && pos < TX4939_RTC_REG_RAMSIZE;
count++, size--) {
__raw_writel(pos++, &rtcreg->adr);
__raw_writel(*buf++, &rtcreg->dat);
}
- spin_unlock_irq(&pdata->rtc->irq_lock);
+ spin_unlock_irq(&pdata->lock);
return count;
}
@@ -240,9 +244,6 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev)
struct resource *res;
int irq, ret;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -ENODEV;
@@ -251,40 +252,34 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev)
return -ENOMEM;
platform_set_drvdata(pdev, pdata);
- if (!devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), pdev->name))
- return -EBUSY;
- pdata->rtcreg = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!pdata->rtcreg)
- return -EBUSY;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ pdata->rtcreg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pdata->rtcreg))
+ return PTR_ERR(pdata->rtcreg);
+ spin_lock_init(&pdata->lock);
tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
if (devm_request_irq(&pdev->dev, irq, tx4939_rtc_interrupt,
- IRQF_DISABLED, pdev->name, &pdev->dev) < 0)
+ 0, pdev->name, &pdev->dev) < 0)
return -EBUSY;
- rtc = rtc_device_register(pdev->name, &pdev->dev,
+ rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&tx4939_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
pdata->rtc = rtc;
ret = sysfs_create_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
- if (ret)
- rtc_device_unregister(rtc);
+
return ret;
}
static int __exit tx4939_rtc_remove(struct platform_device *pdev)
{
struct tx4939rtc_plat_data *pdata = platform_get_drvdata(pdev);
- struct rtc_device *rtc = pdata->rtc;
- spin_lock_irq(&rtc->irq_lock);
- tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
- spin_unlock_irq(&rtc->irq_lock);
sysfs_remove_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
- rtc_device_unregister(rtc);
- platform_set_drvdata(pdev, NULL);
+ spin_lock_irq(&pdata->lock);
+ tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
+ spin_unlock_irq(&pdata->lock);
return 0;
}
@@ -296,18 +291,7 @@ static struct platform_driver tx4939_rtc_driver = {
},
};
-static int __init tx4939rtc_init(void)
-{
- return platform_driver_probe(&tx4939_rtc_driver, tx4939_rtc_probe);
-}
-
-static void __exit tx4939rtc_exit(void)
-{
- platform_driver_unregister(&tx4939_rtc_driver);
-}
-
-module_init(tx4939rtc_init);
-module_exit(tx4939rtc_exit);
+module_platform_driver_probe(tx4939_rtc_driver, tx4939_rtc_probe);
MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
MODULE_DESCRIPTION("TX4939 internal RTC driver");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 18:50:33 +0000