From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 398BBC38A2A for ; Fri, 8 May 2020 11:50:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 172D220A8B for ; Fri, 8 May 2020 11:50:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726751AbgEHLu5 (ORCPT ); Fri, 8 May 2020 07:50:57 -0400 Received: from relay9-d.mail.gandi.net ([217.70.183.199]:42139 "EHLO relay9-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726636AbgEHLu5 (ORCPT ); Fri, 8 May 2020 07:50:57 -0400 X-Originating-IP: 86.202.105.35 Received: from localhost (lfbn-lyo-1-9-35.w86-202.abo.wanadoo.fr [86.202.105.35]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay9-d.mail.gandi.net (Postfix) with ESMTPSA id 100E8FF808; Fri, 8 May 2020 11:50:52 +0000 (UTC) Date: Fri, 8 May 2020 13:50:52 +0200 From: Alexandre Belloni To: Biwen Li Cc: leoyang.li@nxp.com, robh+dt@kernel.org, mpe@ellerman.id.au, benh@kernel.crashing.org, a.zummo@towertech.it, devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-rtc@vger.kernel.org, Biwen Li Subject: Re: [PATCH 2/3] dts: ppc: t4240rdb: add uie_unsupported property to drop warning Message-ID: <20200508115052.GL34497@piout.net> References: <20200508054925.48237-1-biwen.li@oss.nxp.com> <20200508054925.48237-2-biwen.li@oss.nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200508054925.48237-2-biwen.li@oss.nxp.com> Sender: linux-rtc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org On 08/05/2020 13:49:24+0800, Biwen Li wrote: > From: Biwen Li > > 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 > --- > 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 > + // 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