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Wang" , Daniel Baluta Subject: [PATCH v2] firmware: imx: Add support to start/stop a CPU Thread-Topic: [PATCH v2] firmware: imx: Add support to start/stop a CPU Thread-Index: AQHUuIJIb5ERbmz8Z0ilGZjHtOs21Q== Date: Wed, 30 Jan 2019 09:58:00 +0000 Message-ID: <20190130095749.8952-1-daniel.baluta@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1PR0701CA0052.eurprd07.prod.outlook.com (2603:10a6:800:5f::14) To VI1PR0402MB3357.eurprd04.prod.outlook.com (2603:10a6:803:2::18) authentication-results: spf=none (sender IP is ) smtp.mailfrom=daniel.baluta@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [95.76.156.53] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;VI1PR0402MB3357;6:S2y0u4IQCsiKMs+mOIuzdREqEXAPCIuUfNwMAnkECriu5v46X1FmmTlQoahEPYC8D4DuLZEYE5tnV+dm2v2fyQM78314Y2c39zRvJBArnyXNouB9Rl++Q/pgYoCE++rJMYsObOODYlclNCvKndQsWu7fVHW/xq2pYQ5cpH47UkCWSMCb8i6Eu9kxSvdZhihrXJguRtQoJ2iDOhs9tQ2Ug2wAUesfO0hpkPQWgk6DBxT1ovM9Wbyb+5JbvdcyJtoREg/QZkxEF7EwS56pdSdMgNFp+5VJGPirj78rXaIoWOGixHFhBlMiXp07WdBfmamFy/tc4qwd2KkKBRNIORiSmr5JFhBLpa5/FXgnY6iYt8WDQwxVWcgISDLAkITsRdf0RUXTsN3qzOrJ6HkXf+6oSu8gwZE9QnxN71Xm0S+RGYjsSYAsX4uYLdaOG/LdEk1dpEo+TazB5bL/lRqEUKD/ng==;5:X0aYXlcNqC8c5/UB7/Q5fnGPiCpEqnh7QZefRvEaONZrU0abhBgEhV8ql5QsIPffJZy1syLRSF4DDVSTLX6h5GfgnQ6R6pYn2zMwfWq7lX7xHpl8UXlZZ3co0ROXg8gFCt4weU/YPyGs1KfKYre9cMfsLYX2Z4B1flqaU4ruDLc2tTHrnP6dBSUP78U27/1kwAhDfli4R/6O/V4aa1CPkA==;7:OWF/tlMS3EaWzUx4gWixhdv6/0IB0kIDCg0oM2pugB3N9uuQo3SBn/Coe5lqllfRDtkISlQIhZEFtNakZ9SgMLZDVnYtD2q6YHTFmntyLpliM1NLAo+98aHfANCZawrhmt+fZ3OueGwVOScgrqQPCw== x-ms-office365-filtering-correlation-id: 71d2e86c-37eb-48c8-88b8-08d686996ac6 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600110)(711020)(4605077)(4618075)(2017052603328)(7153060)(7193020);SRVR:VI1PR0402MB3357; x-ms-traffictypediagnostic: VI1PR0402MB3357: x-microsoft-antispam-prvs: x-forefront-prvs: 0933E9FD8D x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(39860400002)(376002)(396003)(346002)(136003)(366004)(199004)(189003)(97736004)(71200400001)(71190400001)(66066001)(99286004)(52116002)(2501003)(6116002)(3846002)(86362001)(1076003)(54906003)(6486002)(6436002)(36756003)(316002)(106356001)(4326008)(2906002)(53936002)(39060400002)(2351001)(105586002)(6916009)(102836004)(25786009)(6506007)(6512007)(186003)(386003)(26005)(14454004)(1730700003)(81156014)(8676002)(81166006)(68736007)(5640700003)(7736002)(305945005)(8936002)(2616005)(44832011)(476003)(478600001)(486006)(256004)(50226002);DIR:OUT;SFP:1101;SCL:1;SRVR:VI1PR0402MB3357;H:VI1PR0402MB3357.eurprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: ojixJACOvcmOE9BtTCVEhe9Tiix1bPiqqVwPl09A5H4qQWj9odbDS604zB9d+6/SAeQZG1KeThkC+nFsH+W48TkrtrngK990ksdKjHJSjGH7o50mTNFlJ03Tvl62fNPn56aWKeq7IQ7LqTx8BdCp8LlYO4aRkiRsxj1fqKNxzpovHiz8nO6lnmK/RR2yL5AE9f9B5XDFZavDbeZ6OiBp0tSCboUfOn4Bgq3Lkhi9vzNzoTowwUpVMbtyiT4asXYuXsZTpmz5v/kC77p9vxkJjNMi2rwarc8ZxJasyE9wg8c9ct1Mgt0XAK+k6pij4qmeKNrcqgtrYTd+SsPA/fFY+AwWSRh6Aqq3ZPldfJeajSO5tm++uWz2cz1fBaxbwd+ehm/oPCspd6VcsP2xatRz5TQROGzYB0ZbTTMyHy90bZ8= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 71d2e86c-37eb-48c8-88b8-08d686996ac6 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Jan 2019 09:57:59.3173 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB3357 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is done via RPC call to SCU. Signed-off-by: Daniel Baluta --- Changes since v1: - remove unused variable ret - add documentation for imx_sc_pm_cpu_start function drivers/firmware/imx/misc.c | 38 +++++++++++++++++++++++++++ include/linux/firmware/imx/svc/misc.h | 3 +++ 2 files changed, 41 insertions(+) diff --git a/drivers/firmware/imx/misc.c b/drivers/firmware/imx/misc.c index 97f5424dbac9..f511d6f624fd 100644 --- a/drivers/firmware/imx/misc.c +++ b/drivers/firmware/imx/misc.c @@ -18,6 +18,14 @@ struct imx_sc_msg_req_misc_set_ctrl { u16 resource; } __packed; =20 +struct imx_sc_msg_req_cpu_start { + struct imx_sc_rpc_msg hdr; + u32 address_hi; + u32 address_lo; + u16 resource; + u8 enable; +} __packed; + struct imx_sc_msg_req_misc_get_ctrl { struct imx_sc_rpc_msg hdr; u32 ctrl; @@ -97,3 +105,33 @@ int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32= resource, return 0; } EXPORT_SYMBOL(imx_sc_misc_get_control); + +/* + * This function starts/stops a CPU identified by @resource + * + * @param[in] ipc IPC handle + * @param[in] resource resource the control is associated with + * @param[in] enable true for start, false for stop + * @param[out] address initial instruction address to be executed + * + * @return Returns 0 for success and < 0 for errors. + */ +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource, + bool enable, u64 address) +{ + struct imx_sc_msg_req_cpu_start msg; + struct imx_sc_rpc_msg *hdr =3D &msg.hdr; + + hdr->ver =3D IMX_SC_RPC_VERSION; + hdr->svc =3D (uint8_t)IMX_SC_RPC_SVC_PM; + hdr->func =3D (uint8_t)IMX_SC_PM_FUNC_CPU_START; + hdr->size =3D 4; + + msg.address_hi =3D address >> 32; + msg.address_lo =3D address; + msg.resource =3D resource; + msg.enable =3D enable; + + return imx_scu_call_rpc(ipc, &msg, false); +} +EXPORT_SYMBOL(imx_sc_pm_cpu_start); diff --git a/include/linux/firmware/imx/svc/misc.h b/include/linux/firmware= /imx/svc/misc.h index e21c49aba92f..c03bf2a23add 100644 --- a/include/linux/firmware/imx/svc/misc.h +++ b/include/linux/firmware/imx/svc/misc.h @@ -52,4 +52,7 @@ int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 r= esource, int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource, u8 ctrl, u32 *val); =20 +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource, + bool enable, u64 address); + #endif /* _SC_MISC_API_H */ --=20 2.17.1