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rtc: pl031: set range

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The PL031 and ST v1 RTC are 32bit seconds counters. STv2 is a BCD RTC
apparently going from 0000 to 9999, hopefully handling the leap days
properly until then.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200306005809.38530-2-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2020-03-06 01:58:08 +01:00
parent 61c9fbff9d
commit 03f2a0e45f
1 changed files with 8 additions and 0 deletions
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8
drivers/rtc/rtc-pl031.c
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@ -80,6 +80,8 @@ struct pl031_vendor_data {
bool clockwatch; bool clockwatch;
bool st_weekday; bool st_weekday;
unsigned long irqflags; unsigned long irqflags;
time64_t range_min;
timeu64_t range_max;
}; };
struct pl031_local { struct pl031_local {
@ -375,6 +377,8 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
return PTR_ERR(ldata->rtc); return PTR_ERR(ldata->rtc);
ldata->rtc->ops = ops; ldata->rtc->ops = ops;
ldata->rtc->range_min = vendor->range_min;
ldata->rtc->range_max = vendor->range_max;
ret = rtc_register_device(ldata->rtc); ret = rtc_register_device(ldata->rtc);
if (ret) if (ret)
@ -405,6 +409,7 @@ static struct pl031_vendor_data arm_pl031 = {
.set_alarm = pl031_set_alarm, .set_alarm = pl031_set_alarm,
.alarm_irq_enable = pl031_alarm_irq_enable, .alarm_irq_enable = pl031_alarm_irq_enable,
}, },
.range_max = U32_MAX,
}; };
/* The First ST derivative */ /* The First ST derivative */
@ -418,6 +423,7 @@ static struct pl031_vendor_data stv1_pl031 = {
}, },
.clockwatch = true, .clockwatch = true,
.st_weekday = true, .st_weekday = true,
.range_max = U32_MAX,
}; };
/* And the second ST derivative */ /* And the second ST derivative */
@ -438,6 +444,8 @@ static struct pl031_vendor_data stv2_pl031 = {
* remove IRQF_COND_SUSPEND * remove IRQF_COND_SUSPEND
*/ */
.irqflags = IRQF_SHARED | IRQF_COND_SUSPEND, .irqflags = IRQF_SHARED | IRQF_COND_SUSPEND,
.range_min = RTC_TIMESTAMP_BEGIN_0000,
.range_max = RTC_TIMESTAMP_END_9999,
}; };
static const struct amba_id pl031_ids[] = { static const struct amba_id pl031_ids[] = {