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Thu, 13 Dec 2018 07:07:57 +0000 From: Joakim Zhang To: "mkl@pengutronix.de" , "robh@kernel.org" CC: "linux-can@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , dl-linux-imx , Aisheng Dong , Joakim Zhang Subject: [PATCH 1/2] Documentation: can: flexcan: add PE clock source property to device tree Thread-Topic: [PATCH 1/2] Documentation: can: flexcan: add PE clock source property to device tree Thread-Index: AQHUkrKTIckHgyi7wUKqieTSsLQm4w== Date: Thu, 13 Dec 2018 07:07:57 +0000 Message-ID: <20181213070537.25095-2-qiangqing.zhang@nxp.com> References: <20181213070537.25095-1-qiangqing.zhang@nxp.com> In-Reply-To: <20181213070537.25095-1-qiangqing.zhang@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.17.1 x-clientproxiedby: SG2PR04CA0128.apcprd04.prod.outlook.com (2603:1096:3:16::12) To DB7PR04MB4618.eurprd04.prod.outlook.com (2603:10a6:5:36::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=qiangqing.zhang@nxp.com; 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DIR:OUT; SFP:1101; SCL:1; SRVR:DB7PR04MB4985; H:DB7PR04MB4618.eurprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: DsoFDF+4vOgssqkS+wf3bcxkRpldEbxekhOYGwnxjBXbRTehdARU3nzE7EOXrVKPDslg1BowOesvFRU5FOITq31uq8PWQAt3roOvg/VtTIr1Uiyw7BCp8nLqo6HmzTZdrbVtARM1HdgKUwIVe4ObCs4FP16QMHCeTqvfQgeM6ynwHQcMLvuvgcyKpr4C4LBwZ3tpCbkftxdFmxUrDw7CBOZO+YvNpotknYKNpqtCGc8qzOzwzxiL2V3L9NyJk9L5hl+2Ndcx0t62qsyrCHMJrN2amjooitnJoLDZaFyFlFv9l0DeaIdTAhqg1R8AkQVD spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 95b67485-70fd-4c70-c5a0-08d660c9b56c X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Dec 2018 07:07:57.0813 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR04MB4985 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Dong Aisheng The FlexCAN controller can parse clock source property from DTS file to select PE clock source. Signed-off-by: Dong Aisheng Signed-off-by: Joakim Zhang --- Documentation/devicetree/bindings/net/can/fsl-flexcan.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt b/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt index bc77477c6878..a04168605998 100644 --- a/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt +++ b/Documentation/devicetree/bindings/net/can/fsl-flexcan.txt @@ -32,6 +32,13 @@ Optional properties: ack_gpr is the gpr register offset of CAN stop acknowledge. ack_bit is the bit offset of CAN stop acknowledge. +- fsl,clk-source: Select the clock source to the CAN Protocol Engine (PE). + It's SoC Implementation dependent. Refer to RM for detailed + definition. If this property is not set in device tree node + then driver selects clock source 1 by default. + 0: clock source 0 (oscillator clock) + 1: clock source 1 (peripheral clock) + Example: can@1c000 { @@ -40,4 +47,5 @@ Example: interrupts = <48 0x2>; interrupt-parent = <&mpic>; clock-frequency = <200000000>; // filled in by bootloader + fsl,clk-source = <0>; // select clock source 0 for PE };