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Fri, 8 May 2020 11:59:43 +0000 From: "Biwen Li (OSS)" To: Alexandre Belloni , "Biwen Li (OSS)" CC: Leo Li , "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" Subject: RE: [PATCH 2/3] dts: ppc: t4240rdb: add uie_unsupported property to drop warning Thread-Topic: [PATCH 2/3] dts: ppc: t4240rdb: add uie_unsupported property to drop warning Thread-Index: AQHWJTApGzOZVK/3qUmR8Dfb1zRWHw== Date: Fri, 8 May 2020 11:59:43 +0000 Message-ID: References: <20200508054925.48237-1-biwen.li@oss.nxp.com> <20200508054925.48237-2-biwen.li@oss.nxp.com> <20200508115052.GL34497@piout.net> In-Reply-To: <20200508115052.GL34497@piout.net> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: bootlin.com; dkim=none (message not signed) header.d=none;bootlin.com; dmarc=none action=none header.from=oss.nxp.com; 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x-ms-exchange-antispam-messagedata: IHMX9G0POAMuG+RSCR3mdjkKabPazeqxZxHeuk5fkdxrEE0nYCRV7+zZFsqzdkO36yeTOuLYBJoYm7UJXt9KWyNMDIdFBByH54+7DDMkN884LMI3hVe08I5u1m7vXCmr/dV43qiPwyXlt+RJCvQCAAP/jVm1xKN+kor5vkdtEwv5M+Vg7eQYGr8lUNXpT4kGzowDYvco0tnrWEYIrYravfMDzUal7Q9jvO0jEb45kwLUAgnNYOENNA/5DE36ZR8PmF6TODEERyrdIO9DD1NkjxfgTat5JHKohGdlXydgGNiW+pjvy+FlRW0ddWN4MNPd2Dk38z2WguooxhQKqMCIISsMSdOC4bc4hon2ka5ckuhKS6NHGMXFGUt9diS9Vs3looU/IXHqxiT2SajGpDK003N5BQU2GbQav6dklMHOwv2h4cxhjEc6P4c5RPn9HIaTNxpSRKO0VbzpO9fcK6K6Q+1grlPi1q2p9+rPcnJ9qXc= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 355f6f90-954a-4f89-1ca8-08d7f3474bfd X-MS-Exchange-CrossTenant-originalarrivaltime: 08 May 2020 11:59:43.8131 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: PANhxx5xRj3UYhTzU2IRszibzdlJH8rDmFj8pn8rJW9IFq5YIc+wiP6HEjOt2ufixzAafpHbu8A0x1BWohUQHw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB6PR0401MB2518 Sender: linux-rtc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org >=20 > 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 =3D "dallas,ds1374"; > > reg =3D <0x68>; > > - interrupts =3D <0x1 0x1 0 0>; >=20 > removing the interrupt should be enough to solve your issue Okay, got it. Thanks. >=20 > > + // 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 > > >=20 > -- > Alexandre Belloni, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com