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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?NmlLUXkrSFVHMnJ3R1J1ZXJHcXd6NEJSemIraFk0emVObDA1enVUa1NoRWg5?= =?utf-8?B?a3lUL0pnUTNzZmFwUlNBTDdqSmgwMkQ5ajhBa2RLL2RyNE95bE84eUg4RjZQ?= =?utf-8?B?UytmREJuKzl0UTEwdkUxemM5akNDNUhERVpRTXF5UnZlZ0hDWkpTVzcxMTlr?= =?utf-8?B?ZXF3bnoxM0dmUkcxS0lXekJLKzJlKzJUMTJqcjlkdHBIbFFoK2dsNllMQlhO?= =?utf-8?B?T24zMis1ajU0NlV0K3BrVExIaGVjVENBVG9wMWhOZmNFdzh3NStvSXQvd2lk?= =?utf-8?B?RVhCVGhVY1ZGd1RxVGpJbk1pZ1VObmFYRkUweUZzMVA5NGsxVGhRVUFVckJp?= =?utf-8?B?SzczR04zcUlyUUd0N29NdkhIQ0pYMmxGNU4wMStFRzk2cVVOU3dGQnFlaSt4?= =?utf-8?B?dElCSDhJd2dmeEdsZm95cDhRZEpjWC85akdEbHBRNDhyQjJlR0xVT1hPSXlB?= =?utf-8?B?SjNMOEQ0dno2cnlFTXkwVDhsR3BrVjYvYzhWNm01SU1GRERGYWpQb2srbFVp?= =?utf-8?B?WE9MM2t4a1hvSE8wVFVPaDJaUWVuY0l2VFVLWEd4UGd0ZDVNbGZQWkFlQW8r?= =?utf-8?B?MFFhblNpR2hyR1UrbUdhYURqaHc2VlY0WVAxRnRGYXNUVHp1UjJiSnNHTUxj?= =?utf-8?B?bE9ZYm8venE0LzVMbXdGbUxrZFQwWHA3b1hkOU9rM2dqeldBMTVRYm5uYkdh?= =?utf-8?B?anN1TWxGUFMrQzFnakRrZ1pRM0VMNWpuVm1MK3JmaTN0TlppWC9QMG45TVRj?= =?utf-8?B?L0NBSG1wZmd0MkZWTGhaTkZ0Y1NlTkRwbG5wU1ExZWJxWWZhREdURUJmKzBI?= =?utf-8?B?MG1KRTdZU3JIVFNmbzJkYit2NGV2cVlYbC9INEV6ditlS1Naak5LSGRtMmJi?= =?utf-8?B?SWQzRTJtcmtpb3dRSmUwR1BkcVVIZDJRcFpna1VScDlubGdTdDFuVTU2QXBr?= =?utf-8?B?a0EzN2VBVmRPOGZjbTlIRHVqdHFIeFF5UEFOTVJHNThMYUdGbk1aRXVrbHRz?= =?utf-8?B?UTBiWFEvYXJKMVY1US9Na1IxS3NTYmNQNjdNeTFVb0ZFM1JSRlZMeGdtNFhK?= =?utf-8?B?dm9aT3JGRlpKZE1SSmVqbXFNclA5cFdUU2xxMDlOQ1FXSFNXcVRXSFkrUkdN?= =?utf-8?B?L3JJbC9DYzN3ZFJMd0dJTFFGNUoxMWxoU1lqRmhROHN5OG13RzlWdmROZ1h1?= =?utf-8?B?dFBDbjExS2NLSzhhSHo2R0kwZmplVE1oVW11NC9XbEhBZkYwaDBSLzNVV3VD?= =?utf-8?B?bXpNditsUWI4L2s1dC9HSlhZRlVHWUxsVDlMQUdVUDZpdlFxODdsTUV0dE5q?= =?utf-8?B?bkNiZTdUQjJIL2psbmx2SFlWaUZwcjRnMThXbDZnZjVtT0k3dU5wcFMxcnRM?= =?utf-8?B?SmY5cTdmQXBkTVkxWkc2UitTOFB2MGpKQlJlb01BOFFwSGpnWXNqMUxzNmlX?= =?utf-8?B?Nm8zMjN5VWcxTnZEMFVWdnQwMWJMa3dqalZpNWJJMnVBNW1DTmhGbWNjajNC?= =?utf-8?B?T2VjMGQ0azM0NGg0b2pvdERtaTlZVHZjMzI2Q25OdUFva0VkdWhQVk5XMTNK?= =?utf-8?B?UG5PMHp4UklFeVlXRG9oVFVzTm1Dd3dBT2dROENNck00WEZkRCtEbTR5Ukts?= =?utf-8?B?SEtDTWxHNXZuVkF5OEFlOE1KRkhyOHZ2K3VFZFhRZzJVYW90ZTJOc01mN09P?= =?utf-8?B?ZllLSnlhWlBobjRGRUlJbFZBMEVJclY0N2MrSURGNW9uNEIwaDM1NzM0N2lO?= =?utf-8?B?d09GK0hkMVl1Zk5kYmt4eHRGUjNJdVFRM2s0M05xUERoaW5EMDZQTHBSdUIw?= =?utf-8?B?Z0R1TGpQTTZzbjZDRTJWL3dvbklrUENMUTF4a01tR2RXV3pleXUxMVFCMUZa?= =?utf-8?B?V29DMisrOXhXaUhFYkFvblNiWVRON1BxOEdFcWppa0dxOHkrcll5MnIwMUNB?= =?utf-8?B?VnJPWFlCTlNOVkdHaEEvSjFYa2Uza3VLT2MxQ0tiRmFSOVFXSSsvUXNlRERV?= =?utf-8?B?Vld2b2hyNkxtRkVITWZ5Y3JPeHlCVTJ4QTI1ZEcyQ2luVUtZejZJRjdTejdz?= =?utf-8?B?eSs4Q0t1SDQ3SGpNelFrMlZqNStGTWRrbW5CT2JYUWVmN3RubWhKZUZPc3Yx?= =?utf-8?Q?E3Jf6vvlr7btTBf9EFvtt0p5n?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: a00e9f57-fa86-4749-be19-08ddaa5aa2be X-MS-Exchange-CrossTenant-AuthSource: SJ2PR12MB8109.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jun 2025 09:14:01.3117 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: GlQvTcIu4VFwsbBnxtOaGGiON5v23snhrvsjTQSeWigCxaLFIbLgoVYQhPDho3tQ X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PPF52B16157D On 6/13/25 10:47, Krzysztof Kozlowski wrote: > On 05/06/2025 20:29, Radhey Shyam Pandey wrote: >> Introduce 'reset-delay-us' and 'power-on-delay-us' properties. Default >> delays in datasheet are not good enough for Xilinx Kria KR260 Robotics >> Starter Kit (and others) so there is a need to program board specific >> reset and power on delay via DT. >> >> Signed-off-by: Radhey Shyam Pandey >> --- >> Taken reference from mdio.yaml[1] >> [1]: Documentation/devicetree/bindings/net/mdio.yaml >> --- >> .../devicetree/bindings/usb/microchip,usb5744.yaml | 12 ++++++++++++ >> 1 file changed, 12 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml b/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml >> index c68c04da3399..94a2bebd32da 100644 >> --- a/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml >> +++ b/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml >> @@ -52,6 +52,16 @@ properties: >> description: >> phandle of an usb hub connected via i2c bus. >> >> + reset-delay-us: >> + description: >> + RESET pulse width in microseconds. > > I don't understand - there is no user for this in USB. Why do we need an > ABI if no one ever uses it (and commit msg should clearly explain that)? > >> + >> + power-on-delay-us: > > No user here, either. Plus I just wonder if you are mixing here RC > delays or regulator ramp delays, because datasheet does not mention any > delay. > > Can you point me to datasheet page explaining these delays? Here is datasheet. https://ww1.microchip.com/downloads/aemDocuments/documents/UNG/ProductDocuments/DataSheets/USB5744-Data-Sheet-DS00001855.pdf 10.6.3 chapter minimum assert time is 5us this corresponds to reset-delay-us and then there is requirement for minimum 1ms for configuration strap. On Kria platforms 5us and 1ms is used in U-Boot usb onboard driver but that times needs to be extended to be able to configure hub over i2c. Linux current has hardcoded value 0us/10ms. 33 static const struct onboard_dev_pdata microchip_usb5744_data = { 34 .reset_us = 0, 35 .power_on_delay_us = 10000, 36 .num_supplies = 2, 37 .supply_names = { "vdd", "vdd2" }, 38 .is_hub = true, 39 }; Thanks, Michal