diff mbox series

[2/3] rtc: sirfsoc: set range

Message ID 20200305160452.27808-2-alexandre.belloni@bootlin.com (mailing list archive)
State Mainlined
Commit cd65dd4180df66f5b469e2a52caae3bfe38d5526
Headers show
Series [1/3] rtc: sirfsoc: convert to devm_rtc_allocate_device | expand

Commit Message

Alexandre Belloni March 5, 2020, 4:04 p.m. UTC 
This RTC is a 32bit counter running at 16Hz. This overflows every eight
years and a half. However, the driver uses the SW_VALUE register to store
the overflow, extending the counter to 64bit as long as the update happens
before the overflow.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/rtc/rtc-sirfsoc.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/rtc/rtc-sirfsoc.c b/drivers/rtc/rtc-sirfsoc.c
index b2e72597eee8..8b3c88fb9793 100644
--- a/drivers/rtc/rtc-sirfsoc.c
+++ b/drivers/rtc/rtc-sirfsoc.c
@@ -346,6 +346,7 @@  static int sirfsoc_rtc_probe(struct platform_device *pdev)
 		return PTR_ERR(rtcdrv->rtc);
 
 	rtcdrv->rtc->ops = &sirfsoc_rtc_ops;
+	rtcdrv->rtc->range_max = (1ULL << 60) - 1;
 
 	rtcdrv->irq = platform_get_irq(pdev, 0);
 	err = devm_request_irq(&pdev->dev, rtcdrv->irq, sirfsoc_rtc_irq_handler,