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X-OriginatorOrg: topic.nl X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 May 2025 05:56:38.3802 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ffececa0-66ef-4d09-62ab-08dd8ebe4383 X-MS-Exchange-CrossTenant-Id: 449607a5-3517-482d-8d16-41dd868cbda3 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=449607a5-3517-482d-8d16-41dd868cbda3;Ip=[13.93.42.39];Helo=[westeu12-emailsignatures-cloud.codetwo.com] X-MS-Exchange-CrossTenant-AuthSource: AMS0EPF00000192.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI2PR04MB11052 On 08-05-2025 17:53, Conor Dooley wrote: > On Thu, May 08, 2025 at 05:19:03PM +0200, Mike Looijmans wrote: >> On 08-05-2025 16:58, Conor Dooley wrote: >>> On Wed, May 07, 2025 at 03:11:43PM +0200, Mike Looijmans wrote: >>>> The TI USB8044 is similar to the USB8041. >>> Similar how? Why's a fallback not suitable? >> I don't quite understand what is meant by "fallback" here? > A fallback compatible, since you;re using the same match data as the > 8041. I think it would work. It would look strange though, having to put an=20 additional vid/pid in the devicetree to make it work. >> It's similar in that the USB8044 provides the same functionality and can= use >> the same driver as the USB8041, all that is needed is to add the PID/VID >> values. > Is this onboard_dev_id_table table with the vid/pid used in combination > with dt, or in-place of dt when device detection is dynamic? If the > latter, why can't dt use a fallback compatible since the handling is > identical to the 8041? My basic understanding is: The devicetree match creates a platform device that controls the reset=20 pin of the hub. It's basic task is to de-assert the reset, so the hub=20 starts negotiating. This part also works with the 8041 devicetree entry=20 (which is how I first tried to get it up and running). The VID/PID table then matches the hub on the USB bus, which can then be=20 associated with its platform device. Since the 8044 reports a different=20 VID/PID, this part only worked when I added the entries to the tables. --=20 Mike Looijmans