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Subject[PATCH 2/3] rtc: pl031: set range
Date
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.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/rtc/rtc-pl031.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 2e8e019a6e4c..07dc0f264100 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -80,6 +80,8 @@ struct pl031_vendor_data {
bool clockwatch;
bool st_weekday;
unsigned long irqflags;
+ time64_t range_min;
+ timeu64_t range_max;
};

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);

ldata->rtc->ops = ops;
+ ldata->rtc->range_min = vendor->range_min;
+ ldata->rtc->range_max = vendor->range_max;

ret = rtc_register_device(ldata->rtc);
if (ret)
@@ -405,6 +409,7 @@ static struct pl031_vendor_data arm_pl031 = {
.set_alarm = pl031_set_alarm,
.alarm_irq_enable = pl031_alarm_irq_enable,
},
+ .range_max = U32_MAX,
};

/* The First ST derivative */
@@ -418,6 +423,7 @@ static struct pl031_vendor_data stv1_pl031 = {
},
.clockwatch = true,
.st_weekday = true,
+ .range_max = U32_MAX,
};

/* And the second ST derivative */
@@ -438,6 +444,8 @@ static struct pl031_vendor_data stv2_pl031 = {
* remove 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[] = {
--
2.24.1
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