From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
To: "Heiko Stübner" <heiko@sntech.de>
Cc: Xing Zheng <zhengxing@rock-chips.com>,
a.zummo@towertech.it, rtc-linux@googlegroups.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 9/9] rtc: hym8563: make sure hym8563 can be normal work
Date: Thu, 17 Sep 2015 14:31:38 +0200 [thread overview]
Message-ID: <20150917123138.GG4287@piout.net> (raw)
In-Reply-To: <3439697.Ymf0XB1EzX@diego>
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.
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
next prev parent reply other threads:[~2015-09-17 12:31 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-17 8:28 [PATCH v2 0/9] Build and support rk3036 SoC platform Xing Zheng
2015-09-17 8:28 ` [PATCH v2 1/9] ARM: dts: rockchip: add core rk3036 dts Xing Zheng
2015-09-17 9:18 ` Heiko Stübner
2015-09-24 2:18 ` Xing Zheng
2015-09-17 8:28 ` [PATCH v2 2/9] clk: rockchip: add dt-binding header for rk3036 Xing Zheng
2015-09-17 9:25 ` Heiko Stübner
2015-09-24 2:17 ` Xing Zheng
2015-09-17 8:28 ` [PATCH v2 3/9] clk: rockchip: add clock controller " Xing Zheng
2015-09-17 9:47 ` Heiko Stübner
2015-09-24 3:04 ` Xing Zheng
2015-09-24 3:31 ` Xing Zheng
2015-10-07 10:24 ` Heiko Stuebner
2015-09-17 8:28 ` [PATCH v2 4/9] clk: rockchip: add new clock type and " Xing Zheng
2015-09-17 9:54 ` Heiko Stübner
2015-09-22 22:41 ` Stephen Boyd
2015-09-22 22:58 ` Heiko Stübner
2015-09-22 23:19 ` Stephen Boyd
2015-09-30 23:32 ` Heiko Stübner
2015-10-01 0:51 ` Stephen Boyd
2015-09-17 9:59 ` [PATCH v2 0/9] Build and support rk3036 SoC platform Heiko Stübner
2015-09-17 10:32 ` [PATCH v2 5/9] dt-bindings: add documentation of rk3036 clock controller Xing Zheng
2015-09-17 15:09 ` Heiko Stübner
2015-09-24 3:42 ` Xing Zheng
2015-09-17 10:34 ` [PATCH v2 6/9] pinctrl: rockchip: add support for the rk3036 Xing Zheng
2015-09-17 12:47 ` Heiko Stübner
2015-09-17 10:37 ` [PATCH v2 7/9] rockchip: make sure timer5 is enabled on rk3036 platforms Xing Zheng
2015-09-17 15:05 ` Heiko Stübner
2015-09-28 12:25 ` Xing Zheng
2015-09-28 12:44 ` Heiko Stübner
2015-09-28 12:53 ` Xing Zheng
2015-09-17 10:38 ` [PATCH v2 8/9] ARM: rockchip: add support smp for rk3036 Xing Zheng
2015-09-17 20:15 ` Heiko Stübner
2015-09-28 11:50 ` Xing Zheng
2015-09-17 10:39 ` [PATCH v2 9/9] rtc: hym8563: make sure hym8563 can be normal work Xing Zheng
2015-09-17 12:07 ` Heiko Stübner
2015-09-17 12:31 ` Alexandre Belloni [this message]
2015-09-17 12:44 ` Xing Zheng
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