linux-kernel - [PATCH 04/29] rtc: mpc5121: let the core handle the alarm resolution

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed,  9 Mar 2022 17:22:35 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 04/29] rtc: mpc5121: let the core handle the alarm resolution

Set RTC_FEATURE_ALARM_RES_MINUTE, so the core knows alarms have a
resolution of a minute. Also, the core will properly round down the alarm
instead of up.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/rtc/rtc-mpc5121.c | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c
index bb2ea9bc56f2..6bd9779da3c6 100644
--- a/drivers/rtc/rtc-mpc5121.c
+++ b/drivers/rtc/rtc-mpc5121.c
@@ -210,20 +210,6 @@ static int mpc5121_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
 	struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
 
-	/*
-	 * the alarm has no seconds so deal with it
-	 */
-	if (alarm->time.tm_sec) {
-		alarm->time.tm_sec = 0;
-		alarm->time.tm_min++;
-		if (alarm->time.tm_min >= 60) {
-			alarm->time.tm_min = 0;
-			alarm->time.tm_hour++;
-			if (alarm->time.tm_hour >= 24)
-				alarm->time.tm_hour = 0;
-		}
-	}
-
 	alarm->time.tm_mday = -1;
 	alarm->time.tm_mon = -1;
 	alarm->time.tm_year = -1;
@@ -349,6 +335,7 @@ static int mpc5121_rtc_probe(struct platform_device *op)
 	}
 
 	rtc->rtc->ops = &mpc5200_rtc_ops;
+	set_bit(RTC_FEATURE_ALARM_RES_MINUTE, rtc->rtc->features);
 	rtc->rtc->uie_unsupported = 1;
 	rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_0000;
 	rtc->rtc->range_max = 65733206399ULL; /* 4052-12-31 23:59:59 */
-- 
2.35.1