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| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2020-03-06 08:44:02 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2020-03-16 11:12:10 +0100 |
| commit | 3905d1c02dc9dd0b498567f52380bcd9ce6420af (patch) | |
| tree | 5e277092cf99f7124c8de1feae78b00877ce8fdd /drivers/rtc/rtc-mpc5121.c | |
| parent | fffbe10e2fd3a92a401cbcbb77da7f67fe900eeb (diff) | |
| download | lwn-3905d1c02dc9dd0b498567f52380bcd9ce6420af.tar.gz lwn-3905d1c02dc9dd0b498567f52380bcd9ce6420af.zip | |
rtc: mpc5121: set range
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>
Diffstat (limited to 'drivers/rtc/rtc-mpc5121.c')
| -rw-r--r-- | drivers/rtc/rtc-mpc5121.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c index 845212fd1e33..5507f1847f7c 100644 --- a/drivers/rtc/rtc-mpc5121.c +++ b/drivers/rtc/rtc-mpc5121.c @@ -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); |