linux-kernel - [PATCH 2/3] rtc: sirfsoc: set range

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Message-Id: <20200305160452.27808-2-alexandre.belloni@bootlin.com>
Date:   Thu,  5 Mar 2020 17:04:51 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Barry Song <baohua@...nel.org>
Cc:     linux-rtc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] rtc: sirfsoc: set range

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@...tlin.com>
---
 drivers/rtc/rtc-sirfsoc.c | 1 +
 1 file changed, 1 insertion(+)

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,
-- 
2.24.1