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path: root/drivers/rtc/rtc-mpc5121.c
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Diffstat (limited to 'drivers/rtc/rtc-mpc5121.c')
-rw-r--r--drivers/rtc/rtc-mpc5121.c152
1 files changed, 93 insertions, 59 deletions
diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c
index dfcdf0901d2..dc4f14255cc 100644
--- a/drivers/rtc/rtc-mpc5121.c
+++ b/drivers/rtc/rtc-mpc5121.c
@@ -3,6 +3,7 @@
*
* Copyright 2007, Domen Puncer <domen.puncer@telargo.com>
* Copyright 2008, Freescale Semiconductor, Inc. All rights reserved.
+ * Copyright 2011, Dmitry Eremin-Solenikov
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -12,7 +13,10 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/rtc.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/of_device.h>
+#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/io.h>
#include <linux/slab.h>
@@ -66,7 +70,7 @@ struct mpc5121_rtc_regs {
u32 target_time; /* RTC + 0x20 */
/*
* actual_time:
- * readonly time since VBAT_RTC was last connected
+ * readonly time since VBAT_RTC was last connected
*/
u32 actual_time; /* RTC + 0x24 */
u32 keep_alive; /* RTC + 0x28 */
@@ -145,6 +149,55 @@ static int mpc5121_rtc_set_time(struct device *dev, struct rtc_time *tm)
return 0;
}
+static int mpc5200_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
+ struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
+ int tmp;
+
+ tm->tm_sec = in_8(&regs->second);
+ tm->tm_min = in_8(&regs->minute);
+
+ /* 12 hour format? */
+ if (in_8(&regs->hour) & 0x20)
+ tm->tm_hour = (in_8(&regs->hour) >> 1) +
+ (in_8(&regs->hour) & 1 ? 12 : 0);
+ else
+ tm->tm_hour = in_8(&regs->hour);
+
+ tmp = in_8(&regs->wday_mday);
+ tm->tm_mday = tmp & 0x1f;
+ tm->tm_mon = in_8(&regs->month) - 1;
+ tm->tm_year = in_be16(&regs->year) - 1900;
+ tm->tm_wday = (tmp >> 5) % 7;
+ tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
+ tm->tm_isdst = 0;
+
+ return 0;
+}
+
+static int mpc5200_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
+ struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
+
+ mpc5121_rtc_update_smh(regs, tm);
+
+ /* date */
+ out_8(&regs->month_set, tm->tm_mon + 1);
+ out_8(&regs->weekday_set, tm->tm_wday ? tm->tm_wday : 7);
+ out_8(&regs->date_set, tm->tm_mday);
+ out_be16(&regs->year_set, tm->tm_year + 1900);
+
+ /* set date sequence */
+ out_8(&regs->set_date, 0x1);
+ out_8(&regs->set_date, 0x3);
+ out_8(&regs->set_date, 0x1);
+ out_8(&regs->set_date, 0x0);
+
+ return 0;
+}
+
static int mpc5121_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
@@ -240,58 +293,43 @@ static int mpc5121_rtc_alarm_irq_enable(struct device *dev,
return 0;
}
-static int mpc5121_rtc_update_irq_enable(struct device *dev,
- unsigned int enabled)
-{
- struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
- struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
- int val;
-
- val = in_8(&regs->int_enable);
-
- if (enabled)
- val = (val & ~0x8) | 0x1;
- else
- val &= ~0x1;
-
- out_8(&regs->int_enable, val);
-
- return 0;
-}
-
static const struct rtc_class_ops mpc5121_rtc_ops = {
.read_time = mpc5121_rtc_read_time,
.set_time = mpc5121_rtc_set_time,
.read_alarm = mpc5121_rtc_read_alarm,
.set_alarm = mpc5121_rtc_set_alarm,
.alarm_irq_enable = mpc5121_rtc_alarm_irq_enable,
- .update_irq_enable = mpc5121_rtc_update_irq_enable,
};
-static int __devinit mpc5121_rtc_probe(struct platform_device *op,
- const struct of_device_id *match)
+static const struct rtc_class_ops mpc5200_rtc_ops = {
+ .read_time = mpc5200_rtc_read_time,
+ .set_time = mpc5200_rtc_set_time,
+ .read_alarm = mpc5121_rtc_read_alarm,
+ .set_alarm = mpc5121_rtc_set_alarm,
+ .alarm_irq_enable = mpc5121_rtc_alarm_irq_enable,
+};
+
+static int mpc5121_rtc_probe(struct platform_device *op)
{
struct mpc5121_rtc_data *rtc;
int err = 0;
- u32 ka;
- rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
+ rtc = devm_kzalloc(&op->dev, sizeof(*rtc), GFP_KERNEL);
if (!rtc)
return -ENOMEM;
rtc->regs = of_iomap(op->dev.of_node, 0);
if (!rtc->regs) {
dev_err(&op->dev, "%s: couldn't map io space\n", __func__);
- err = -ENOSYS;
- goto out_free;
+ return -ENOSYS;
}
device_init_wakeup(&op->dev, 1);
- dev_set_drvdata(&op->dev, rtc);
+ platform_set_drvdata(op, rtc);
rtc->irq = irq_of_parse_and_map(op->dev.of_node, 1);
- err = request_irq(rtc->irq, mpc5121_rtc_handler, IRQF_DISABLED,
+ err = request_irq(rtc->irq, mpc5121_rtc_handler, 0,
"mpc5121-rtc", &op->dev);
if (err) {
dev_err(&op->dev, "%s: could not request irq: %i\n",
@@ -301,26 +339,34 @@ static int __devinit mpc5121_rtc_probe(struct platform_device *op,
rtc->irq_periodic = irq_of_parse_and_map(op->dev.of_node, 0);
err = request_irq(rtc->irq_periodic, mpc5121_rtc_handler_upd,
- IRQF_DISABLED, "mpc5121-rtc_upd", &op->dev);
+ 0, "mpc5121-rtc_upd", &op->dev);
if (err) {
dev_err(&op->dev, "%s: could not request irq: %i\n",
__func__, rtc->irq_periodic);
goto out_dispose2;
}
- ka = in_be32(&rtc->regs->keep_alive);
- if (ka & 0x02) {
- dev_warn(&op->dev,
- "mpc5121-rtc: Battery or oscillator failure!\n");
- out_be32(&rtc->regs->keep_alive, ka);
+ if (of_device_is_compatible(op->dev.of_node, "fsl,mpc5121-rtc")) {
+ u32 ka;
+ ka = in_be32(&rtc->regs->keep_alive);
+ if (ka & 0x02) {
+ dev_warn(&op->dev,
+ "mpc5121-rtc: Battery or oscillator failure!\n");
+ out_be32(&rtc->regs->keep_alive, ka);
+ }
+
+ rtc->rtc = devm_rtc_device_register(&op->dev, "mpc5121-rtc",
+ &mpc5121_rtc_ops, THIS_MODULE);
+ } else {
+ rtc->rtc = devm_rtc_device_register(&op->dev, "mpc5200-rtc",
+ &mpc5200_rtc_ops, THIS_MODULE);
}
- rtc->rtc = rtc_device_register("mpc5121-rtc", &op->dev,
- &mpc5121_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc->rtc)) {
err = PTR_ERR(rtc->rtc);
goto out_free_irq;
}
+ rtc->rtc->uie_unsupported = 1;
return 0;
@@ -332,59 +378,47 @@ out_dispose2:
out_dispose:
irq_dispose_mapping(rtc->irq);
iounmap(rtc->regs);
-out_free:
- kfree(rtc);
return err;
}
-static int __devexit mpc5121_rtc_remove(struct platform_device *op)
+static int mpc5121_rtc_remove(struct platform_device *op)
{
- struct mpc5121_rtc_data *rtc = dev_get_drvdata(&op->dev);
+ struct mpc5121_rtc_data *rtc = platform_get_drvdata(op);
struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
/* disable interrupt, so there are no nasty surprises */
out_8(&regs->alm_enable, 0);
out_8(&regs->int_enable, in_8(&regs->int_enable) & ~0x1);
- rtc_device_unregister(rtc->rtc);
iounmap(rtc->regs);
free_irq(rtc->irq, &op->dev);
free_irq(rtc->irq_periodic, &op->dev);
irq_dispose_mapping(rtc->irq);
irq_dispose_mapping(rtc->irq_periodic);
- dev_set_drvdata(&op->dev, NULL);
- kfree(rtc);
return 0;
}
-static struct of_device_id mpc5121_rtc_match[] __devinitdata = {
+#ifdef CONFIG_OF
+static struct of_device_id mpc5121_rtc_match[] = {
{ .compatible = "fsl,mpc5121-rtc", },
+ { .compatible = "fsl,mpc5200-rtc", },
{},
};
+#endif
-static struct of_platform_driver mpc5121_rtc_driver = {
+static struct platform_driver mpc5121_rtc_driver = {
.driver = {
.name = "mpc5121-rtc",
.owner = THIS_MODULE,
- .of_match_table = mpc5121_rtc_match,
+ .of_match_table = of_match_ptr(mpc5121_rtc_match),
},
.probe = mpc5121_rtc_probe,
- .remove = __devexit_p(mpc5121_rtc_remove),
+ .remove = mpc5121_rtc_remove,
};
-static int __init mpc5121_rtc_init(void)
-{
- return of_register_platform_driver(&mpc5121_rtc_driver);
-}
-module_init(mpc5121_rtc_init);
-
-static void __exit mpc5121_rtc_exit(void)
-{
- of_unregister_platform_driver(&mpc5121_rtc_driver);
-}
-module_exit(mpc5121_rtc_exit);
+module_platform_driver(mpc5121_rtc_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("John Rigby <jcrigby@gmail.com>");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 22:06:59 +0000