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rtc: mpc5121: set range

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The datasheet states that 4052 is the maximum value for year. However, the
mpc5121 read_time and set_time function abuse the target time register
instead of using the broken down time so it is limited to 2106.

Link: https://lore.kernel.org/r/20200306074404.58909-3-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2020-03-06 08:44:02 +01:00
parent fffbe10e2f
commit 3905d1c02d
1 changed files with 9 additions and 0 deletions
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9
drivers/rtc/rtc-mpc5121.c
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@ -352,6 +352,8 @@ static int mpc5121_rtc_probe(struct platform_device *op)
rtc->rtc->ops = &mpc5200_rtc_ops;
rtc->rtc->uie_unsupported = 1;
rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_0000;
rtc->rtc->range_max = 65733206399ULL; /* 4052-12-31 23:59:59 */
if (of_device_is_compatible(op->dev.of_node, "fsl,mpc5121-rtc")) {
u32 ka;
@ -362,6 +364,13 @@ static int mpc5121_rtc_probe(struct platform_device *op)
out_be32(&rtc->regs->keep_alive, ka);
}
rtc->rtc->ops = &mpc5121_rtc_ops;
/*
* This is a limitation of the driver that abuses the target
* time register, the actual maximum year for the mpc5121 is
* also 4052.
*/
rtc->rtc->range_min = 0;
rtc->rtc->range_max = U32_MAX;
}
err = rtc_register_device(rtc->rtc);