>
> On 08/05/2020 13:49:24+0800, Biwen Li wrote:
> > From: Biwen Li <biwen...@nxp.com>
> >
> > This adds uie_unsupported property to drop warning as follows:
> > - $ hwclock.util-linux
> > hwclock.util-linux: select() to /dev/rtc0
> > to wait for clock tick timed out
> >
> > My case:
> > - RTC ds1374's INT pin is connected to VCC on T4240RDB,
> > then the RTC cannot inform cpu about the alarm interrupt
> >
> > Signed-off-by: Biwen Li <biwen...@nxp.com>
> > ---
> > arch/powerpc/boot/dts/fsl/t4240rdb.dts | 6 +++++-
> > 1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/powerpc/boot/dts/fsl/t4240rdb.dts
> b/arch/powerpc/boot/dts/fsl/t4240rdb.dts
> > index a56a705d41f7..ccdd10202e56 100644
> > --- a/arch/powerpc/boot/dts/fsl/t4240rdb.dts
> > +++ b/arch/powerpc/boot/dts/fsl/t4240rdb.dts
> > @@ -144,7 +144,11 @@
> > rtc@68 {
> > compatible = "dallas,ds1374";
> > reg = <0x68>;
> > - interrupts = <0x1 0x1 0 0>;
>
> removing the interrupt should be enough to solve your issue
Okay, got it. Thanks.
>
> > + // The ds1374's INT pin isn't
> > + // connected to cpu's INT pin,
> > + // so the rtc cannot synchronize
> > + // clock tick per second.
> > + uie_unsupported;
> > };
> > };
> >
> > --
> > 2.17.1
> >
>
> --
> Alexandre Belloni, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
