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From:   Richard Leitner <richard.leitner@skidata.com>
To:     <a.zummo@towertech.it>, <alexandre.belloni@bootlin.com>
CC:     <linux-rtc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        Richard Leitner <richard.leitner@skidata.com>
Subject: [PATCH 2/3] rtc: s35390a: set uie_unsupported
Date:   Tue, 21 May 2019 16:20:23 +0200
Message-ID: <20190521142024.25894-3-richard.leitner@skidata.com>
In-Reply-To: <20190521142024.25894-1-richard.leitner@skidata.com>
References: <20190521142024.25894-1-richard.leitner@skidata.com>
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Sender: linux-kernel-owner@vger.kernel.org
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Alarms are only supported on a per minute basis. This is why
uie_unsupported is set. Furthermore issue a warning when a second based
alarm is requested.

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
---
 drivers/rtc/rtc-s35390a.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
index 6fb6d835b178..462407570750 100644
--- a/drivers/rtc/rtc-s35390a.c
+++ b/drivers/rtc/rtc-s35390a.c
@@ -289,6 +289,9 @@ static int s35390a_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
 		alm->time.tm_min, alm->time.tm_hour, alm->time.tm_mday,
 		alm->time.tm_mon, alm->time.tm_year, alm->time.tm_wday);
 
+	if (alm->time.tm_sec != 0)
+		dev_warn(&client->dev, "Alarms are only supported on a per minute basis!\n");
+
 	/* disable interrupt (which deasserts the irq line) */
 	err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts));
 	if (err < 0)
@@ -500,6 +503,9 @@ static int s35390a_probe(struct i2c_client *client,
 		goto exit_dummy;
 	}
 
+	/* supports per-minute alarms only, therefore set uie_unsupported */
+	s35390a->rtc->uie_unsupported = 1;
+
 	if (status1 & S35390A_FLAG_INT2)
 		rtc_update_irq(s35390a->rtc, 1, RTC_AF);
 
-- 
2.20.1