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x-ms-exchange-antispam-messagedata: XEKgCiOmX1He8Y1BDfdVZs3wQbxPfCR80S9F5U0gxrAr2DkQb43G6F71yqeUBltjy1G8n73r+A30czLUZjJxo6mjCieawTmArEvMl5GZc2THYAkhb7RcofQgiFauF5ldkSp3DXVMMtzZATJBfjn+5KPzT7ImFtMCjwU0AiP0qwLUskI2DNqjE8yhutw3LGVEnokMZVelFH3O/UGRHhHbU0cEo8iSJLaMnNPBPnx0HyGMwWZXyFSAfJEZ0+hV0IwxpV1PvEIf7a4H/K8QMN4lJ/H3A9VkqpEUdEqjzjv7vQ+o37DvP6MrRgE1lmWB/+vnHrIICrYQ+jGNBAnlt9ULexe/4wxLf5f5+dEoAjfga2ate9lI1OTgm8UunV2YGLLY63Ro7S+pW3MuLPEqN+ubpV6AyxLwL4HNNa9pEyzbvHdPtbBS6H5GziJpZ47BtjFJ2usSFC7dsIPKaX55L78xAhvVQpBMcPoN4sFsfIKyO7U= x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="us-ascii" Content-ID: <99315C56E1A87B4E94F7EF394B4E2BD1@eurprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: efd2d15b-0784-4952-2751-08d7f72535f4 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 May 2020 10:05:48.6163 (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: s9lzR+PhCuBpnlKGUhrTjEifjFQTHxNpVSpTHyJZFmiwAOGmPB2bM3lkky00PGJgz8OLbJJ/AVS7eE7wrybXAw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR04MB6838 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On 20-05-13 10:36:05, Felipe Balbi wrote: >=20 > Hi, >=20 > "Sid Spry" writes: >=20 > > Hi Peter, thanks for pointing me towards the ffs-test. Unfortunately af= ter > > some exploration in that area I still don't see how I would add a preex= isting > > function to the configuration to be handled by the kernel. > > > > I do see something in an AIO test in the host code where libusb is used= to > > bind a kernel driver to an endpoint. Is that something that will be nec= essary? > > Device side, I'm still unsure how I tell the function to handle ECM/eth= ernet > > on a collection of endpoints. > > > > I understand how USB works fairly well, especially on microcontrollers,= but am > > a little lost still in understanding the Linux machinery for USB. >=20 Would you please let ECM gadget work first at your board, then let f_fs wor= k using test application (you need to compile both host and device application for it). After that, you may have more precise concept for Linux USB gadget framework. --=20 Thanks, Peter Chen=