linux-kernel - [PATCH] rtc: hym8563: set uie

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Date:	Tue, 06 May 2014 19:02:28 +0200
From:	Heiko Stübner <heiko@...ech.de>
To:	Alessandro Zummo <a.zummo@...ertech.it>, akpm@...ux-foundation.org
Cc:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: [PATCH] rtc: hym8563: set uie_unsupported

The alarm of the hym8563 only supports a minute accuracy, while
the uie wants an alarm one second in the future. Therefore things like
the select() syscall will fail with a timeout, because the next alarm
will happen in a worst case of 60 seconds.

Signed-off-by: Heiko Stuebner <heiko@...ech.de>
Cc: stable@...r.kernel.org
---
 drivers/rtc/rtc-hym8563.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index bd628a6..e5f13c4 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -569,6 +569,9 @@ static int hym8563_probe(struct i2c_client *client,
 	if (IS_ERR(hym8563->rtc))
 		return PTR_ERR(hym8563->rtc);
 
+	/* the hym8563 alarm only supports a minute accuracy */
+	hym8563->rtc->uie_unsupported = 1;
+
 #ifdef CONFIG_COMMON_CLK
 	hym8563_clkout_register_clk(hym8563);
 #endif
-- 
1.9.0


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