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Wang" , Daniel Baluta Subject: [PATCH v3] firmware: imx: Add support to start/stop a CPU Thread-Topic: [PATCH v3] firmware: imx: Add support to start/stop a CPU Thread-Index: AQHUuJ/zljwGGsgqVEqW1pCa+zHOeA== Date: Wed, 30 Jan 2019 13:30:22 +0000 Message-ID: <20190130133005.5732-1-daniel.baluta@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1P190CA0003.EURP190.PROD.OUTLOOK.COM (2603:10a6:802:2b::16) 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;VI1PR0402MB3805;6:hEAbz7+LBFeqVrtlmf5sapoD45lqWWgqXFdw99lQNGFLSkS5zIy4nNNdb+OejPN8V/PPpiIqe9r0Y+gZHh0QTnfDTNszztyZ2KaVlJfaR8LjUIp4SNkfHo5emJEdwanfx/ohMAjxBdGFo63ofA510phPsPNIV0ge9wO4LGDilQs0beFJPpgXu9pDs0wAMlVTEAHGRZDKwH2B6/ZfhFivezBS2sYPXnKE046vgGvDGc/XrSPxB5RL5Kb0mzpkd6yqMrswjlRqulne95cc8wQeVB35kCKlXfKbwwaxR+UCCRJjyrDKWknTnvsjdcF+twECqiiEv1daKFnuUyEhfV566OueupRyvrHgddE1EjuG0KrIB2UvrdVuAUf5s796uklinF1WAWiaFUCAQ4KWAb3MSH9fhWaJ8Nehtuj4eW/ammqvhrkX3N4+liVW71WGLUq3zwkwy3AemD61cQrAe7jXjg==;5:Y5933ZQEISt/aIxLlWE00aQruaf8natQ4QtLy28jeO95warjj6sf9ZNptR8CPC4PypnC3fyBeIb9fg6sOJvhehBvPVlepanzKyTHuDyl1aIzOgKrKtkEhnZjy3lK0sCuQ7MpWwH9Hjoqu07LV62S+/e/tFePnFJij4qFw/ZnC095aFxRTbthsXQP5HVr1hawN7qcSZ9D2glBnwutS1j9/A==;7:noBQ2hheIFc6bN7SsQiAmaMBeTJB6p+bJxhRBcshlhq4Fi4Jdv96RadPEyNcKvw3U/jPVe5gB6baogYWSQuVTO7S9hIqaGLe9M2pi/vFUy9vqRMtIpxnbeE/Y02sdApdq64foDrkooTjyvUVB9lMvQ== x-ms-office365-filtering-correlation-id: 154e7b1c-0d1e-499a-fbdd-08d686b71584 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:VI1PR0402MB3805; x-ms-traffictypediagnostic: VI1PR0402MB3805: x-microsoft-antispam-prvs: x-forefront-prvs: 0933E9FD8D x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(136003)(376002)(39860400002)(366004)(396003)(346002)(199004)(189003)(5640700003)(97736004)(478600001)(106356001)(6116002)(3846002)(6486002)(105586002)(7736002)(25786009)(8676002)(305945005)(2906002)(66066001)(1730700003)(8936002)(81166006)(81156014)(14454004)(6436002)(6512007)(4326008)(50226002)(68736007)(2501003)(2616005)(54906003)(86362001)(186003)(39060400002)(99286004)(26005)(6506007)(52116002)(71190400001)(256004)(102836004)(476003)(36756003)(71200400001)(486006)(2351001)(1076003)(386003)(316002)(44832011)(6916009)(53936002);DIR:OUT;SFP:1101;SCL:1;SRVR:VI1PR0402MB3805;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: RpbCOVrMfi29AyMpN5pgt5ZHHvXYDuAfBKV2C6xG0c9Qtn1yncs/m7MGVJ+9qUpjy2lNw/zchm86M9QXagT7oFJAtHtSCJ7QIYvfZwHZyu3BmgjjI0dlsSwBTLA6C/Z7ZXyBAUCsH0+LRG/j+6zVFf02g4+jTT/2Eeek4bAqO1y3W1K3BYEeaim38nSHI6EKdqPBS7mrkvwCKk6BELetIOdELZqD4TKd4qXAGxbdCtxe8SMz7scE7YTAWqruR0mo0RseHfOfmf+pYLQidm+i/9n8pnqK6g9e/cOkCy/tlGqvtT6ECWqqUZOJ3y1UY1qDGqMKLOgCbG1pd4ozW+3V515sHKk2zA9b89FKQi0uhjOYnyT1JwQlxaxD68vox1WfN9X4h870tpyipeGj+il0IA5Qy1s7toB8egCMOv5Ly3o= 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: 154e7b1c-0d1e-499a-fbdd-08d686b71584 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Jan 2019 13:30:21.2924 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB3805 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 v2: (as per Aisheng's review) - rename address with phys_address - remove unnecessary uint8_t cast - use 'true' as last parameter of imx_scu_call_rpc to actually wait for a response from SCU. 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..4b56a587dacd 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[in] phys_addr 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 phys_addr) +{ + 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 IMX_SC_RPC_SVC_PM; + hdr->func =3D IMX_SC_PM_FUNC_CPU_START; + hdr->size =3D 4; + + msg.address_hi =3D phys_addr >> 32; + msg.address_lo =3D phys_addr; + msg.resource =3D resource; + msg.enable =3D enable; + + return imx_scu_call_rpc(ipc, &msg, true); +} +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..031dd4d3c766 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 phys_addr); + #endif /* _SC_MISC_API_H */ --=20 2.17.1