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X-MS-Exchange-CrossPremises-SCL: 1 X-MS-Exchange-CrossPremises-Processed-By-Journaling: Journal Agent X-OrganizationHeadersPreserved: PR3P192MB0762.EURP192.PROD.OUTLOOK.COM X-Proofpoint-GUID: Fl7eYSEC6bhXRTVPz6IGmmh0eiCAFD3O X-Proofpoint-ORIG-GUID: Fl7eYSEC6bhXRTVPz6IGmmh0eiCAFD3O X-Authority-Analysis: v=2.4 cv=L9cdQ/T8 c=1 sm=1 tr=0 ts=68c2d42d cx=c_pps a=hqJzBl7Ahnt1scFs/UlQVQ==:117 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=8gLI3H-aZtYA:10 a=5WlnoM2IXMwQxd68EiMA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTExMDEyMiBTYWx0ZWRfX2MJhvjP4Uct9 69ykIaPZPAJ2Bd9kgxjXA5XRnjbA9tshFVWmkY/JPGza/OBOPO1uEwTHRIQyBW7GcOiX5CPvULW eE1KPwx6Y6RxdMRFJ/Vp46ig6F7akmD1K9jtRiGAeA/MSMPIB569CltlLe4NCcbBPKddUpviq47 x6UdeydikMK+42ZVauUfddIBIPksoweshXQhIf8QgqdreNhbgD56Kc1cSYjilqD3XbZ4NQmc2Zg jbxYe9eEQS9wZbjhdxQC2a7mE8a9GeM3WYSRXbkSUgDi1uTtU5xJ4f6VVFI5gK3eA/UBCUUkcco 5oKvAKz3zOmknilIG7bV5VtDFJykgcNYou3ZDKzjNUB0IqejgUB3LMbJnh115o= Hello devs, I'm trying to bring up the SLM9670 TPM 2.0 device connected via SPI on a QorIQ T1023-based board. Pin control is fully configured through the RCW, so I haven't added any additional properties in the device tree. The SPI controller accesses the TPM using `#CS0`. However, the driver reads an incorrect vendor ID (0x1000000) and hangs during the startup sequence. A logic analyzer shows that the chip select line goes high immediately after transmitting 4 bytes, which, according to various forum discussions, does not comply with the TPM specification. Unfortunately, I haven't found a definitive solution to this issue. Could this be a bug in the `spi-fsl-espi` driver, or is it possibly a hardware limitation of the T1023? I've come across some suggestions that involve using a GPIO as an alternative chip select instead of the one provided by the SPI controller. Can anyone confirm whether this workaround is viable? I’d prefer to avoid a PCB redesign unless it's absolutely necessary. Best regards Alexander Wilhelm