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path: root/drivers/rtc/rtc-at91sam9.c
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Diffstat (limited to 'drivers/rtc/rtc-at91sam9.c')
-rw-r--r--drivers/rtc/rtc-at91sam9.c111
1 files changed, 43 insertions, 68 deletions
diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 831868904e0..59637430453 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -19,11 +19,12 @@
#include <linux/interrupt.h>
#include <linux/ioctl.h>
#include <linux/slab.h>
+#include <linux/platform_data/atmel.h>
+#include <linux/io.h>
-#include <mach/board.h>
#include <mach/at91_rtt.h>
#include <mach/cpu.h>
-
+#include <mach/hardware.h>
/*
* This driver uses two configurable hardware resources that live in the
@@ -58,6 +59,7 @@ struct sam9_rtc {
struct rtc_device *rtcdev;
u32 imr;
void __iomem *gpbr;
+ int irq;
};
#define rtt_readl(rtc, field) \
@@ -288,11 +290,11 @@ static const struct rtc_class_ops at91_rtc_ops = {
/*
* Initialize and install RTC driver
*/
-static int __devinit at91_rtc_probe(struct platform_device *pdev)
+static int at91_rtc_probe(struct platform_device *pdev)
{
struct resource *r, *r_gpbr;
struct sam9_rtc *rtc;
- int ret;
+ int ret, irq;
u32 mr;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -302,27 +304,34 @@ static int __devinit at91_rtc_probe(struct platform_device *pdev)
return -ENODEV;
}
- rtc = kzalloc(sizeof *rtc, GFP_KERNEL);
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "failed to get interrupt resource\n");
+ return irq;
+ }
+
+ rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
if (!rtc)
return -ENOMEM;
+ rtc->irq = irq;
+
/* platform setup code should have handled this; sigh */
if (!device_can_wakeup(&pdev->dev))
device_init_wakeup(&pdev->dev, 1);
platform_set_drvdata(pdev, rtc);
- rtc->rtt = ioremap(r->start, resource_size(r));
+ rtc->rtt = devm_ioremap(&pdev->dev, r->start, resource_size(r));
if (!rtc->rtt) {
dev_err(&pdev->dev, "failed to map registers, aborting.\n");
- ret = -ENOMEM;
- goto fail;
+ return -ENOMEM;
}
- rtc->gpbr = ioremap(r_gpbr->start, resource_size(r_gpbr));
+ rtc->gpbr = devm_ioremap(&pdev->dev, r_gpbr->start,
+ resource_size(r_gpbr));
if (!rtc->gpbr) {
dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n");
- ret = -ENOMEM;
- goto fail_gpbr;
+ return -ENOMEM;
}
mr = rtt_readl(rtc, MR);
@@ -337,21 +346,17 @@ static int __devinit at91_rtc_probe(struct platform_device *pdev)
mr &= ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
rtt_writel(rtc, MR, mr);
- rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev,
- &at91_rtc_ops, THIS_MODULE);
- if (IS_ERR(rtc->rtcdev)) {
- ret = PTR_ERR(rtc->rtcdev);
- goto fail_register;
- }
+ rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &at91_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc->rtcdev))
+ return PTR_ERR(rtc->rtcdev);
/* register irq handler after we know what name we'll use */
- ret = request_irq(AT91_ID_SYS, at91_rtc_interrupt,
- IRQF_SHARED,
- dev_name(&rtc->rtcdev->dev), rtc);
+ ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt,
+ IRQF_SHARED, dev_name(&rtc->rtcdev->dev), rtc);
if (ret) {
- dev_dbg(&pdev->dev, "can't share IRQ %d?\n", AT91_ID_SYS);
- rtc_device_unregister(rtc->rtcdev);
- goto fail_register;
+ dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq);
+ return ret;
}
/* NOTE: sam9260 rev A silicon has a ROM bug which resets the
@@ -365,35 +370,19 @@ static int __devinit at91_rtc_probe(struct platform_device *pdev)
dev_name(&rtc->rtcdev->dev));
return 0;
-
-fail_register:
- iounmap(rtc->gpbr);
-fail_gpbr:
- iounmap(rtc->rtt);
-fail:
- platform_set_drvdata(pdev, NULL);
- kfree(rtc);
- return ret;
}
/*
* Disable and remove the RTC driver
*/
-static int __devexit at91_rtc_remove(struct platform_device *pdev)
+static int at91_rtc_remove(struct platform_device *pdev)
{
struct sam9_rtc *rtc = platform_get_drvdata(pdev);
u32 mr = rtt_readl(rtc, MR);
/* disable all interrupts */
rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));
- free_irq(AT91_ID_SYS, rtc);
-
- rtc_device_unregister(rtc->rtcdev);
- iounmap(rtc->gpbr);
- iounmap(rtc->rtt);
- platform_set_drvdata(pdev, NULL);
- kfree(rtc);
return 0;
}
@@ -406,14 +395,13 @@ static void at91_rtc_shutdown(struct platform_device *pdev)
rtt_writel(rtc, MR, mr & ~rtc->imr);
}
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
/* AT91SAM9 RTC Power management control */
-static int at91_rtc_suspend(struct platform_device *pdev,
- pm_message_t state)
+static int at91_rtc_suspend(struct device *dev)
{
- struct sam9_rtc *rtc = platform_get_drvdata(pdev);
+ struct sam9_rtc *rtc = dev_get_drvdata(dev);
u32 mr = rtt_readl(rtc, MR);
/*
@@ -422,8 +410,8 @@ static int at91_rtc_suspend(struct platform_device *pdev,
*/
rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
if (rtc->imr) {
- if (device_may_wakeup(&pdev->dev) && (mr & AT91_RTT_ALMIEN)) {
- enable_irq_wake(AT91_ID_SYS);
+ if (device_may_wakeup(dev) && (mr & AT91_RTT_ALMIEN)) {
+ enable_irq_wake(rtc->irq);
/* don't let RTTINC cause wakeups */
if (mr & AT91_RTT_RTTINCIEN)
rtt_writel(rtc, MR, mr & ~AT91_RTT_RTTINCIEN);
@@ -434,49 +422,36 @@ static int at91_rtc_suspend(struct platform_device *pdev,
return 0;
}
-static int at91_rtc_resume(struct platform_device *pdev)
+static int at91_rtc_resume(struct device *dev)
{
- struct sam9_rtc *rtc = platform_get_drvdata(pdev);
+ struct sam9_rtc *rtc = dev_get_drvdata(dev);
u32 mr;
if (rtc->imr) {
- if (device_may_wakeup(&pdev->dev))
- disable_irq_wake(AT91_ID_SYS);
+ if (device_may_wakeup(dev))
+ disable_irq_wake(rtc->irq);
mr = rtt_readl(rtc, MR);
rtt_writel(rtc, MR, mr | rtc->imr);
}
return 0;
}
-#else
-#define at91_rtc_suspend NULL
-#define at91_rtc_resume NULL
#endif
+static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
+
static struct platform_driver at91_rtc_driver = {
.probe = at91_rtc_probe,
- .remove = __devexit_p(at91_rtc_remove),
+ .remove = at91_rtc_remove,
.shutdown = at91_rtc_shutdown,
- .suspend = at91_rtc_suspend,
- .resume = at91_rtc_resume,
.driver = {
.name = "rtc-at91sam9",
.owner = THIS_MODULE,
+ .pm = &at91_rtc_pm_ops,
},
};
-static int __init at91_rtc_init(void)
-{
- return platform_driver_register(&at91_rtc_driver);
-}
-module_init(at91_rtc_init);
-
-static void __exit at91_rtc_exit(void)
-{
- platform_driver_unregister(&at91_rtc_driver);
-}
-module_exit(at91_rtc_exit);
-
+module_platform_driver(at91_rtc_driver);
MODULE_AUTHOR("Michel Benoit");
MODULE_DESCRIPTION("RTC driver for Atmel AT91SAM9x");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 15:14:39 +0000