rtc: mpc5121: set range (3905d1c0) · Commits · 戴 / test

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>

drivers/rtc/rtc-mpc5121.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -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);

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