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Date: Thu, 17 Sep 2015 20:44:38 +0800 From: Xing Zheng <zhengxing@...k-chips.com> To: Alexandre Belloni <alexandre.belloni@...e-electrons.com> CC: Heiko Stübner <heiko@...ech.de>, a.zummo@...ertech.it, rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH v2 9/9] rtc: hym8563: make sure hym8563 can be normal work On 2015年09月17日 20:31, Alexandre Belloni wrote: > Hi, > > On 17/09/2015 at 14:07:47 +0200, Heiko Stübner wrote : >> Am Donnerstag, 17. September 2015, 18:39:28 schrieb Xing Zheng: >>> The rtc hym8563 maybe failed to register if first startup or rtc >>> powerdown: >>> [ 0.988540 ] rtc-hym8563 1-0051: no valid clock/calendar values available >>> [ 0.995642 ] rtc-hym8563 1-0051: rtc core: registered hym8563 as rtc0 [ >>> 1.078985 ] rtc-hym8563 1-0051: no valid clock/calendar values available [ >>> 1.085698 ] rtc-hym8563 1-0051: hctosys: unable to read the hardware >>> clock >>> >>> We can set initial time for rtc and register it: >>> [ 0.995678 ] rtc-hym8563 1-0051: rtc core: registered hym8563 as rtc0 >>> [ 1.080313 ] rtc-hym8563 1-0051: setting system clock to 2000-01-01 >>> 00:02:00 UTC (946684920) >> hmm, not setting a false date was actually intentional when I did the driver. >> >> In my mind it is better to shout and keep programs from using wrong values >> than to set some arbitary date and let programs silently use this wrong value. >> > Indeed, I find it worse to set a wrong value instead of returning an > error. Userspace has to define its policy when reading the time fails. > OK, I got it, this patch will be abandoned at next version. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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