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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DU2PR04MB8949.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 67ccc736-8997-41b1-2c69-08da1d81487b X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Apr 2022 19:10:32.9427 (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: v25rVTY1tmNOmhyyYfXOdc1oMZb4bi3XzuzOmaigRsUutY6BCZZ9py41HLghYXaL8QdoMOhkjhM6ucXFOaTuNg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS4PR04MB9550 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Vladimir Oltean > Sent: Wednesday, April 13, 2022 1:23 PM > To: Leo Li > Cc: Shawn Guo ; linux-arm- > kernel@lists.infradead.org; linux-kernel@vger.kernel.org; Biwen Li > > Subject: Re: [PATCH v3 3/8] arm64: dts: ls1028a: add flextimer based pwm > nodes >=20 > On Wed, Apr 13, 2022 at 06:07:20PM +0000, Leo Li wrote: > > > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:1210.21-1219.5: > > > Warning > > > (unique_unit_address): /soc/pwm@2800000: duplicate unit-address > > > (also used in node /soc/timer@2800000) > > > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:1221.21-1230.5: > > > Warning > > > (unique_unit_address): /soc/pwm@2810000: duplicate unit-address > > > (also used in node /soc/timer@2810000) > > > > Well, this is similar situation as pcie. The flextimer controller can > > be used as timer, PWM or alarm. We have separate drivers and bindings > > for these modes which resulted in different nodes for the same > > controller. >=20 > I think the mfd framework can address the situation where multiple driver= s, > with multiple functionalities, want access to the same memory region? I know mfd is used for device providing multiple functions at the same time= . I'm not sure if it can help dealing with the one function at a time scen= ario. 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Wed, 13 Apr 2022 19:10:33 +0000 Received: from DU2PR04MB8949.eurprd04.prod.outlook.com ([fe80::a074:1c67:a763:25b8]) by DU2PR04MB8949.eurprd04.prod.outlook.com ([fe80::a074:1c67:a763:25b8%9]) with mapi id 15.20.5144.030; Wed, 13 Apr 2022 19:10:33 +0000 From: Leo Li To: Vladimir Oltean CC: Shawn Guo , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , Biwen Li Subject: RE: [PATCH v3 3/8] arm64: dts: ls1028a: add flextimer based pwm nodes Thread-Topic: [PATCH v3 3/8] arm64: dts: ls1028a: add flextimer based pwm nodes Thread-Index: AQHX8M2Qp2fR5PuKkEeWcFzMp8XOI6zuxrMAgAAZn+CAAAU2gIAABtXg Date: Wed, 13 Apr 2022 19:10:32 +0000 Message-ID: References: <20211214093240.23320-1-leoyang.li@nxp.com> <20211214093240.23320-4-leoyang.li@nxp.com> <20220413163306.hp5qyxxgdlekczet@skbuf> <20220413182327.lbemqze46eq7ulfn@skbuf> In-Reply-To: <20220413182327.lbemqze46eq7ulfn@skbuf> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > -----Original Message----- > From: Vladimir Oltean > Sent: Wednesday, April 13, 2022 1:23 PM > To: Leo Li > Cc: Shawn Guo ; linux-arm- > kernel@lists.infradead.org; linux-kernel@vger.kernel.org; Biwen Li > > Subject: Re: [PATCH v3 3/8] arm64: dts: ls1028a: add flextimer based pwm > nodes > > On Wed, Apr 13, 2022 at 06:07:20PM +0000, Leo Li wrote: > > > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:1210.21-1219.5: > > > Warning > > > (unique_unit_address): /soc/pwm@2800000: duplicate unit-address > > > (also used in node /soc/timer@2800000) > > > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:1221.21-1230.5: > > > Warning > > > (unique_unit_address): /soc/pwm@2810000: duplicate unit-address > > > (also used in node /soc/timer@2810000) > > > > Well, this is similar situation as pcie. The flextimer controller can > > be used as timer, PWM or alarm. We have separate drivers and bindings > > for these modes which resulted in different nodes for the same > > controller. > > I think the mfd framework can address the situation where multiple drivers, > with multiple functionalities, want access to the same memory region? I know mfd is used for device providing multiple functions at the same time. I'm not sure if it can help dealing with the one function at a time scenario. Regards, Leo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel