Fix SMBus using SSDT-SBUS-MCHC.aml

[Poles]

Hi,

I am new to Opencore. I have successfully installed macOS Monterey (12.5.1) on my device. On post installation I tried to fix Apple SMBus with SSDT-SBUS-MCHC.aml, but looks like its not working. Because before the patch when I run this command:

kextstat | grep -E "AppleSMBusController|AppleSMBusPCI"

it shows

Quote

No variant specified, falling back to release
138 0 0xffffff7f98f8e000 0x1000 0x1000 com.apple.driver.AppleSMBusPCI (1.0.14d1) B34AAD69-4A29-3463-8A4C-0E7890FFF929 <16 7 6 3>
165 1 0xffffff7f98f82000 0x7000 0x7000 com.apple.driver.AppleSMBusController (1.0.18d1) 524232C0-73C9-3130-A258-1EE71F7110C6 <164 16 15 7 6 3>

 

Even after the patch was applied it shows same output. My SMBUS is PC00.SBUS which I found from Windows. So I updated the SSDT-SBUS-MCHC.dsl file with it and then generated the .aml file.

DefinitionBlock ("", "SSDT", 2, "ACDT", "MCHCSBUS", 0x00000000)
{
    External (_SB_.PC00, DeviceObj)
    External (_SB_.PC00.SBUS, DeviceObj)

    Scope (_SB.PC00)
    {
        Device (MCHC)
        {
            Name (_ADR, Zero)  // _ADR: Address
            Method (_STA, 0, NotSerialized)  // _STA: Status
            {
                If (_OSI ("Darwin"))
                {
                    Return (0x0F)
                }
                Else
                {
                    Return (Zero)
                }
            }
        }
    }

    Device (_SB.PC00.SBUS.BUS0)
    {
        Name (_CID, "smbus")  // _CID: Compatible ID
        Name (_ADR, Zero)  // _ADR: Address
        Device (DVL0)
        {
            Name (_ADR, 0x57)  // _ADR: Address
            Name (_CID, "diagsvault")  // _CID: Compatible ID
            Method (_DSM, 4, NotSerialized)  // _DSM: Device-Specific Method
            {
                If (!Arg2)
                {
                    Return (Buffer (One)
                    {
                         0x57                                             // W
                    })
                }

                Return (Package (0x02)
                {
                    "address",
                    0x57
                })
            }
        }
        Method (_STA, 0, NotSerialized)  // _STA: Status
        {
            If (_OSI ("Darwin"))
            {
                Return (0x0F)
            }
            Else
            {
                Return (Zero)
            }
        }
    }
}

But I don't understand why its not working. Somebody can show me what's wrong?

Motherboard: Gigabyte Z690 UD AX
CPU: i5-12400F
OpenCore: 0.8.5

[MaLd0n]

Use this efi folder with bios/uefi in default

-Desktop AlderLake Download HERE

[miliuco]

@Poles

The kexstat command gives to me the same output as yours in the hack and even in a real Mac. Without SSDT-SBUS-MCHC. Maybe you don't need this SSDT.

 

Executing: /usr/bin/kmutil showloaded
No variant specified, falling back to release
  124    1 0xffffff7f95ea9000 0x6ffd     0x6ffd     com.apple.driver.AppleSMBusController (1.0.18d1) 67C1DE20-8B96-3253-B373-5F234037AA59 <64 17 16 7 6 3>
  134    0 0xffffff7f95eb5000 0x1000     0x1000     com.apple.driver.AppleSMBusPCI (1.0.14d1) 27454DC4-17BA-3D0C-AD38-E7EDD2C69545 <17 7 6 3>