Hi all, I use the \MdeModulePkg\Bus\I2c\I2cDxe driver and load the driver with the following command: load I2cDxe.efi As a result, both I2cHostDriverSupported and I2cBusDriverSupported get the returned value Unsupported. The code is as follows:
I2cHostDriverSupported ( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE Controller, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath ) { ... Status = gBS->OpenProtocol ( Controller, &gEfiI2cBusConfigurationManagementProtocolGuid, (VOID **)&I2cBusConfigurationManagement, This->DriverBindingHandle, Controller, EFI_OPEN_PROTOCOL_BY_DRIVER ); ... I2cBusDriverSupported ( IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE Controller, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath ) { .. Status = gBS->OpenProtocol ( Controller, &gEfiI2cEnumerateProtocolGuid, (VOID**)&I2cEnumerate, This->DriverBindingHandle, Controller, EFI_OPEN_PROTOCOL_BY_DRIVER ); My system is as follows: Platform: Minnowboard Max pkg : edk2-platform\ Vlv2TbltDevicePkgX64 My questions are as follows: * Before I2cHostDriverSupported, should I need to enable the host configuratoin, such as setting slave address or frequency? Is there a more complete example? * For the Minnowboard platform, how to set I2cHostDriverSupported and I2cBusDriverSupported to get the return value of EFI_SUCCESS? Any suggestion is highly appreciated! -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#93185): https://edk2.groups.io/g/devel/message/93185 Mute This Topic: https://groups.io/mt/93496214/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-