From 13bfa942254f0894f22bcbfccee3480df1bfd89d Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Fri, 19 Apr 2019 10:24:56 +0200 Subject: [PATCH] rtc: ds2404: set range The real-time clock is a 5-byte binary counter. It is incremented 256 times per second. The least significant byte is a count of fractional seconds. The upper four bytes are a count of seconds. The realtime clock can accumulate 136 years of seconds before rolling over. Signed-off-by: Alexandre Belloni --- drivers/rtc/rtc-ds2404.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/rtc/rtc-ds2404.c b/drivers/rtc/rtc-ds2404.c index b886b6a..7b36c09b 100644 --- a/drivers/rtc/rtc-ds2404.c +++ b/drivers/rtc/rtc-ds2404.c @@ -234,6 +234,10 @@ static int rtc_probe(struct platform_device *pdev) chip->ops = &ds2404_gpio_ops; + chip->rtc = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(chip->rtc)) + return PTR_ERR(chip->rtc); + retval = chip->ops->map_io(chip, pdev, pdata); if (retval) goto err_chip; @@ -244,12 +248,12 @@ static int rtc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, chip); - chip->rtc = devm_rtc_device_register(&pdev->dev, "ds2404", - &ds2404_rtc_ops, THIS_MODULE); - if (IS_ERR(chip->rtc)) { - retval = PTR_ERR(chip->rtc); + chip->rtc->ops = &ds2404_rtc_ops; + chip->rtc->range_max = U32_MAX; + + retval = rtc_register_device(chip->rtc); + if (retval) goto err_io; - } ds2404_enable_osc(&pdev->dev); return 0; -- 2.7.4