Opened 2 years ago
Closed 2 years ago
#18159 closed enhancement (invalid)
Add AMD i2c support to i2c-piix4
| Reported by: | kallisti5 | Owned by: | nobody |
|---|---|---|---|
| Priority: | low | Milestone: | Unscheduled |
| Component: | Drivers | Version: | R1/Development |
| Keywords: | i2c ryzen | Cc: | |
| Blocked By: | Blocking: | ||
| Platform: | x86-64 |
Description
AMD's common i2c controller (1022:790b) could be added to our i2c-piix4 driver with low/medium effort.
Linux handles AMD in via drivers/i2c/busses/i2c-piix4.c (PCI_DEVICE_ID_AMD_KERNCZ_SMBUS).
We really need some quirk checks (mmio mostly), and to adjust addresses slightly based on those quirk checks.
Change History (4)
comment:1 by , 2 years ago
comment:2 by , 2 years ago
https://cgit.haiku-os.org/haiku/tree/src/add-ons/kernel/busses/i2c/pch/pch_i2c_pci.cpp
Sorry, should have called it pch. That's almost 1:1 the Linux i2c-piix4 driver. (same PCIID's, etc)
comment:4 by , 2 years ago
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
Ack, you're right. We essentially need a new piix4 i2c/smbus driver to cover anything AMD. Lame.
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"our i2c-piix4 driver", dunno what you mean.