linux-kernel - [PATCH v2 6/9] rtc: pcf2123: don't use weekday alarm

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Message-Id: <20190814151002.7324-6-alexandre.belloni@bootlin.com>
Date:   Wed, 14 Aug 2019 17:09:59 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     linux-rtc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH v2 6/9] rtc: pcf2123: don't use weekday alarm

The week day may not be set properly by userspace. This would result is
missed alarms. Disable alarm matching on weekday.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/rtc/rtc-pcf2123.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index ba37060f299e..175aa8779623 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -82,7 +82,7 @@
 #define OSC_HAS_STOPPED		BIT(7)	/* Clock has been stopped */
 
 /* PCF2123_REG_ALRM_XX BITS */
-#define ALRM_ENABLE		BIT(7)	/* MN, HR, DM, or DW alarm enable */
+#define ALRM_DISABLE		BIT(7)	/* MN, HR, DM, or DW alarm matching */
 
 /* PCF2123_REG_TMR_CLKOUT BITS */
 #define CD_TMR_4096KHZ		(0)	/* 4096 KHz countdown timer */
@@ -286,7 +286,7 @@ static int pcf2123_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
 	txbuf[0] = bin2bcd(alm->time.tm_min & 0x7F);
 	txbuf[1] = bin2bcd(alm->time.tm_hour & 0x3F);
 	txbuf[2] = bin2bcd(alm->time.tm_mday & 0x3F);
-	txbuf[3] = bin2bcd(alm->time.tm_wday & 0x07);
+	txbuf[3] = ALRM_DISABLE;
 
 	ret = regmap_bulk_write(pcf2123->map, PCF2123_REG_ALRM_MN, txbuf,
 				sizeof(txbuf));
-- 
2.21.0