Hi Andy Sorry for the late reply The reason for writing this driver is that our customers hope that the LED and GPIO can be used out of the box When they using our X86-Platform About the document and ACPI expert, I will provide them after I improve them. Please wait for a few days. Thank you very much Yuechao Zhao 在 2021/5/2 下午6:50,“Andy Shevchenko”<andy.shevchenko@xxxxxxxxx> 写入: On Fri, Apr 30, 2021 at 8:27 AM yuechao.zhao(赵越超) <yuechao.zhao@xxxxxxxxxxxxxxxx> wrote: > > From: Yuechao Zhao <yuechao.zhao@xxxxxxxxxxxxxxxx> > > With this driver, we can multiplex PCA9554/PCA9555 into LED and GPIO > based on the ACPI data of BIOS. NAK as per v2. Please, add a proper documentation and show ACPI excerpt, and last but not least is missing justification. -- With Best Regards, Andy Shevchenko