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path: root/drivers/rtc/rtc-davinci.c
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Diffstat (limited to 'drivers/rtc/rtc-davinci.c')
-rw-r--r--drivers/rtc/rtc-davinci.c151
1 files changed, 19 insertions, 132 deletions
diff --git a/drivers/rtc/rtc-davinci.c b/drivers/rtc/rtc-davinci.c
index 34647fc1ee9..c0a3b59f65a 100644
--- a/drivers/rtc/rtc-davinci.c
+++ b/drivers/rtc/rtc-davinci.c
@@ -117,10 +117,8 @@
static DEFINE_SPINLOCK(davinci_rtc_lock);
struct davinci_rtc {
- struct rtc_device *rtc;
+ struct rtc_device *rtc;
void __iomem *base;
- resource_size_t pbase;
- size_t base_size;
int irq;
};
@@ -231,10 +229,6 @@ davinci_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
case RTC_WIE_OFF:
rtc_ctrl &= ~PRTCSS_RTC_CTRL_WEN;
break;
- case RTC_UIE_OFF:
- case RTC_UIE_ON:
- ret = -ENOTTY;
- break;
default:
ret = -ENOIOCTLCMD;
}
@@ -473,55 +467,6 @@ static int davinci_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
return 0;
}
-static int davinci_rtc_irq_set_state(struct device *dev, int enabled)
-{
- struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev);
- unsigned long flags;
- u8 rtc_ctrl;
-
- spin_lock_irqsave(&davinci_rtc_lock, flags);
-
- rtc_ctrl = rtcss_read(davinci_rtc, PRTCSS_RTC_CTRL);
-
- if (enabled) {
- while (rtcss_read(davinci_rtc, PRTCSS_RTC_CTRL)
- & PRTCSS_RTC_CTRL_WDTBUS)
- cpu_relax();
-
- rtc_ctrl |= PRTCSS_RTC_CTRL_TE;
- rtcss_write(davinci_rtc, rtc_ctrl, PRTCSS_RTC_CTRL);
-
- rtcss_write(davinci_rtc, 0x0, PRTCSS_RTC_CLKC_CNT);
-
- rtc_ctrl |= PRTCSS_RTC_CTRL_TIEN |
- PRTCSS_RTC_CTRL_TMMD |
- PRTCSS_RTC_CTRL_TMRFLG;
- } else
- rtc_ctrl &= ~PRTCSS_RTC_CTRL_TIEN;
-
- rtcss_write(davinci_rtc, rtc_ctrl, PRTCSS_RTC_CTRL);
-
- spin_unlock_irqrestore(&davinci_rtc_lock, flags);
-
- return 0;
-}
-
-static int davinci_rtc_irq_set_freq(struct device *dev, int freq)
-{
- struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev);
- unsigned long flags;
- u16 tmr_counter = (0x8000 >> (ffs(freq) - 1));
-
- spin_lock_irqsave(&davinci_rtc_lock, flags);
-
- rtcss_write(davinci_rtc, tmr_counter & 0xFF, PRTCSS_RTC_TMR0);
- rtcss_write(davinci_rtc, (tmr_counter & 0xFF00) >> 8, PRTCSS_RTC_TMR1);
-
- spin_unlock_irqrestore(&davinci_rtc_lock, flags);
-
- return 0;
-}
-
static struct rtc_class_ops davinci_rtc_ops = {
.ioctl = davinci_rtc_ioctl,
.read_time = davinci_rtc_read_time,
@@ -529,62 +474,38 @@ static struct rtc_class_ops davinci_rtc_ops = {
.alarm_irq_enable = davinci_rtc_alarm_irq_enable,
.read_alarm = davinci_rtc_read_alarm,
.set_alarm = davinci_rtc_set_alarm,
- .irq_set_state = davinci_rtc_irq_set_state,
- .irq_set_freq = davinci_rtc_irq_set_freq,
};
static int __init davinci_rtc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct davinci_rtc *davinci_rtc;
- struct resource *res, *mem;
+ struct resource *res;
int ret = 0;
- davinci_rtc = kzalloc(sizeof(struct davinci_rtc), GFP_KERNEL);
- if (!davinci_rtc) {
- dev_dbg(dev, "could not allocate memory for private data\n");
+ davinci_rtc = devm_kzalloc(&pdev->dev, sizeof(struct davinci_rtc), GFP_KERNEL);
+ if (!davinci_rtc)
return -ENOMEM;
- }
davinci_rtc->irq = platform_get_irq(pdev, 0);
if (davinci_rtc->irq < 0) {
dev_err(dev, "no RTC irq\n");
- ret = davinci_rtc->irq;
- goto fail1;
+ return davinci_rtc->irq;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(dev, "no mem resource\n");
- ret = -EINVAL;
- goto fail1;
- }
+ davinci_rtc->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(davinci_rtc->base))
+ return PTR_ERR(davinci_rtc->base);
- davinci_rtc->pbase = res->start;
- davinci_rtc->base_size = resource_size(res);
-
- mem = request_mem_region(davinci_rtc->pbase, davinci_rtc->base_size,
- pdev->name);
- if (!mem) {
- dev_err(dev, "RTC registers at %08x are not free\n",
- davinci_rtc->pbase);
- ret = -EBUSY;
- goto fail1;
- }
-
- davinci_rtc->base = ioremap(davinci_rtc->pbase, davinci_rtc->base_size);
- if (!davinci_rtc->base) {
- dev_err(dev, "unable to ioremap MEM resource\n");
- ret = -ENOMEM;
- goto fail2;
- }
+ platform_set_drvdata(pdev, davinci_rtc);
- davinci_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+ davinci_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&davinci_rtc_ops, THIS_MODULE);
if (IS_ERR(davinci_rtc->rtc)) {
- dev_err(dev, "unable to register RTC device, err %ld\n",
- PTR_ERR(davinci_rtc->rtc));
- goto fail3;
+ dev_err(dev, "unable to register RTC device, err %d\n",
+ ret);
+ return PTR_ERR(davinci_rtc->rtc);
}
rtcif_write(davinci_rtc, PRTCIF_INTFLG_RTCSS, PRTCIF_INTFLG);
@@ -594,11 +515,11 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CTRL);
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CCTRL);
- ret = request_irq(davinci_rtc->irq, davinci_rtc_interrupt,
- IRQF_DISABLED, "davinci_rtc", davinci_rtc);
+ ret = devm_request_irq(dev, davinci_rtc->irq, davinci_rtc_interrupt,
+ 0, "davinci_rtc", davinci_rtc);
if (ret < 0) {
dev_err(dev, "unable to register davinci RTC interrupt\n");
- goto fail4;
+ return ret;
}
/* Enable interrupts */
@@ -608,25 +529,12 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
rtcss_write(davinci_rtc, PRTCSS_RTC_CCTRL_CAEN, PRTCSS_RTC_CCTRL);
- platform_set_drvdata(pdev, davinci_rtc);
-
device_init_wakeup(&pdev->dev, 0);
return 0;
-
-fail4:
- rtc_device_unregister(davinci_rtc->rtc);
-fail3:
- iounmap(davinci_rtc->base);
-fail2:
- release_mem_region(davinci_rtc->pbase, davinci_rtc->base_size);
-fail1:
- kfree(davinci_rtc);
-
- return ret;
}
-static int __devexit davinci_rtc_remove(struct platform_device *pdev)
+static int __exit davinci_rtc_remove(struct platform_device *pdev)
{
struct davinci_rtc *davinci_rtc = platform_get_drvdata(pdev);
@@ -634,40 +542,19 @@ static int __devexit davinci_rtc_remove(struct platform_device *pdev)
rtcif_write(davinci_rtc, 0, PRTCIF_INTEN);
- free_irq(davinci_rtc->irq, davinci_rtc);
-
- rtc_device_unregister(davinci_rtc->rtc);
-
- iounmap(davinci_rtc->base);
- release_mem_region(davinci_rtc->pbase, davinci_rtc->base_size);
-
- platform_set_drvdata(pdev, NULL);
-
- kfree(davinci_rtc);
-
return 0;
}
static struct platform_driver davinci_rtc_driver = {
.probe = davinci_rtc_probe,
- .remove = __devexit_p(davinci_rtc_remove),
+ .remove = __exit_p(davinci_rtc_remove),
.driver = {
.name = "rtc_davinci",
.owner = THIS_MODULE,
},
};
-static int __init rtc_init(void)
-{
- return platform_driver_probe(&davinci_rtc_driver, davinci_rtc_probe);
-}
-module_init(rtc_init);
-
-static void __exit rtc_exit(void)
-{
- platform_driver_unregister(&davinci_rtc_driver);
-}
-module_exit(rtc_exit);
+module_platform_driver_probe(davinci_rtc_driver, davinci_rtc_probe);
MODULE_AUTHOR("Miguel Aguilar <miguel.aguilar@ridgerun.com>");
MODULE_DESCRIPTION("Texas Instruments DaVinci PRTC Driver");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 21:54:21 +0000