package/base/linux/amd-i2c-smb.patch

   1
   2 The Aura Sync controller for the motherboard resides on an auxiliary SMBus.
   3 For AMD systems, this SMBus is not initialised with the stock Linux kernel;
   4 to get it to work, you will need to patch your kernel. The patch follows for
   5 Linux kernel 4.20 (derived from
   6 https://gitlab.com/CalcProgrammer1/KeyboardVisualizer/issues/85#note_121577579):
   7
   8 --- a/drivers/i2c/busses/i2c-piix4.c    2019-01-09 01:23:06.197945763 +1100
   9 +++ b/drivers/i2c/busses/i2c-piix4.c    2019-01-09 01:24:58.007942622 +1100
  10 @@ -964,6 +964,11 @@
  11                 retval = piix4_setup_sb800(dev, id, 1);
  12         }
  13
  14 +       if (dev->vendor == PCI_VENDOR_ID_AMD &&
  15 +           dev->device == PCI_DEVICE_ID_AMD_KERNCZ_SMBUS) {
  16 +               retval = piix4_setup_sb800(dev, id, 1);
  17 +       }
  18 +
  19         if (retval > 0) {
  20                 /* Try to add the aux adapter if it exists,
  21                  * piix4_add_adapter will clean up if this fails */