[34/51] rtc: pl031: stop using rtc deprecated functions

Message ID 1497951359-13334-35-git-send-email-benjamin.gaignard@linaro.org
State New
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Series
  • rtc: stop using rtc deprecated functions
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Commit Message

Benjamin Gaignard June 20, 2017, 9:35 a.m.
rtc_time_to_tm() and rtc_tm_to_time() are deprecated because they
rely on 32bits variables and that will make rtc break in y2038/2016.
Stop using those two functions to safer 64bits ones.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>

CC: Linus Walleij <linus.walleij@linaro.org>
CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Alexandre Belloni <alexandre.belloni@free-electrons.com>
CC: rtc-linux@googlegroups.com
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
---
 drivers/rtc/rtc-pl031.c | 31 +++++++++++++------------------
 1 file changed, 13 insertions(+), 18 deletions(-)

-- 
1.9.1

Comments

Linus Walleij June 20, 2017, 4:08 p.m. | #1
On Tue, Jun 20, 2017 at 11:35 AM, Benjamin Gaignard
<benjamin.gaignard@linaro.org> wrote:

> rtc_time_to_tm() and rtc_tm_to_time() are deprecated because they

> rely on 32bits variables and that will make rtc break in y2038/2016.

> Stop using those two functions to safer 64bits ones.

>

> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>

> CC: Linus Walleij <linus.walleij@linaro.org>

> CC: Alessandro Zummo <a.zummo@towertech.it>

> CC: Alexandre Belloni <alexandre.belloni@free-electrons.com>

> CC: rtc-linux@googlegroups.com

> CC: linux-kernel@vger.kernel.org

> CC: linux-arm-kernel@lists.infradead.org


Acked-by: Linus Walleij <linus.walleij@linaro.org>


Yours,
Linus Walleij
Russell King - ARM Linux June 20, 2017, 9:05 p.m. | #2
On Tue, Jun 20, 2017 at 06:08:48PM +0200, Linus Walleij wrote:
> On Tue, Jun 20, 2017 at 11:35 AM, Benjamin Gaignard

> <benjamin.gaignard@linaro.org> wrote:

> 

> > rtc_time_to_tm() and rtc_tm_to_time() are deprecated because they

> > rely on 32bits variables and that will make rtc break in y2038/2016.

> > Stop using those two functions to safer 64bits ones.

> >

> > Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>

> > CC: Linus Walleij <linus.walleij@linaro.org>

> > CC: Alessandro Zummo <a.zummo@towertech.it>

> > CC: Alexandre Belloni <alexandre.belloni@free-electrons.com>

> > CC: rtc-linux@googlegroups.com

> > CC: linux-kernel@vger.kernel.org

> > CC: linux-arm-kernel@lists.infradead.org

> 

> Acked-by: Linus Walleij <linus.walleij@linaro.org>


Naked-again-by: Russell King

Really, people need to stop re-posting the same patches that have
already been naked.

This patch fixes NOTHING.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

Patch

diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index e1687e1..07f72b3 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -127,11 +127,11 @@  static int pl031_stv2_tm_to_time(struct device *dev,
 		return -EINVAL;
 	} else if (wday == -1) {
 		/* wday is not provided, calculate it here */
-		unsigned long time;
+		unsigned long long time;
 		struct rtc_time calc_tm;
 
-		rtc_tm_to_time(tm, &time);
-		rtc_time_to_tm(time, &calc_tm);
+		time = rtc_tm_to_time64(tm);
+		rtc_time64_to_tm(time, &calc_tm);
 		wday = calc_tm.tm_wday;
 	}
 
@@ -252,30 +252,27 @@  static int pl031_read_time(struct device *dev, struct rtc_time *tm)
 {
 	struct pl031_local *ldata = dev_get_drvdata(dev);
 
-	rtc_time_to_tm(readl(ldata->base + RTC_DR), tm);
+	rtc_time64_to_tm(readl(ldata->base + RTC_DR), tm);
 
 	return 0;
 }
 
 static int pl031_set_time(struct device *dev, struct rtc_time *tm)
 {
-	unsigned long time;
+	unsigned long long time;
 	struct pl031_local *ldata = dev_get_drvdata(dev);
-	int ret;
-
-	ret = rtc_tm_to_time(tm, &time);
 
-	if (ret == 0)
-		writel(time, ldata->base + RTC_LR);
+	time = rtc_tm_to_time64(tm);
+	writel(time, ldata->base + RTC_LR);
 
-	return ret;
+	return 0;
 }
 
 static int pl031_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
 	struct pl031_local *ldata = dev_get_drvdata(dev);
 
-	rtc_time_to_tm(readl(ldata->base + RTC_MR), &alarm->time);
+	rtc_time64_to_tm(readl(ldata->base + RTC_MR), &alarm->time);
 
 	alarm->pending = readl(ldata->base + RTC_RIS) & RTC_BIT_AI;
 	alarm->enabled = readl(ldata->base + RTC_IMSC) & RTC_BIT_AI;
@@ -286,17 +283,15 @@  static int pl031_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 static int pl031_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
 	struct pl031_local *ldata = dev_get_drvdata(dev);
-	unsigned long time;
+	unsigned long long time;
 	int ret;
 
 	/* At the moment, we can only deal with non-wildcarded alarm times. */
 	ret = rtc_valid_tm(&alarm->time);
 	if (ret == 0) {
-		ret = rtc_tm_to_time(&alarm->time, &time);
-		if (ret == 0) {
-			writel(time, ldata->base + RTC_MR);
-			pl031_alarm_irq_enable(dev, alarm->enabled);
-		}
+		time = rtc_tm_to_time64(&alarm->time);
+		writel(time, ldata->base + RTC_MR);
+		pl031_alarm_irq_enable(dev, alarm->enabled);
 	}
 
 	return ret;