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[v2,0/4] i2c: smbus cleanups and SPD support for piix4

Message ID 20240627-piix4-spd-v2-0-617ce47b8ff4@weissschuh.net
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Series i2c: smbus cleanups and SPD support for piix4 | expand

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Thomas Weißschuh June 27, 2024, 5:48 p.m. UTC 
Patches 1-3 are preparation patches, with patch 1 being a fix.
Patch 4 is the actual change to piix4.

Patch 3 drops the warning about muxed busses.
I didn't feel that the warning only would warrant the additional
complexity it introduces with multiple callers of i2c_register_spd().

If other feel different, maybe a more generic warning/info or a source
code comment would suffice.

On a machine with 32 slots of which 16 are populated only the first 8
slots are addressable, half of which are empty.
Unfortunately I couldn't run a custom kernel for testing.
But manually instantiating ee1004 devices worked as expected,
so the proposed changes should also work.

Tested with spd5118 and two DIMMs.

Guenter, I dropped your Tested-by as the piix4 patch changed.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
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Changes in v2:
- Add new i2c-smbus prep patches
- Only register SPD for port 0
- Link to v1: https://lore.kernel.org/r/20240530-piix4-spd-v1-1-9cbf1abebf41@weissschuh.net

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Thomas Weißschuh (4):
      i2c: smbus: only limit max banks to eight
      i2c: smbus: probe SPDs on a best-effort basis
      i2c: smbus: drop warning about muxed segments requirement
      i2c: piix4: Register SPDs

 drivers/i2c/busses/Kconfig     |  1 +
 drivers/i2c/busses/i2c-piix4.c |  4 ++++
 drivers/i2c/i2c-smbus.c        | 15 ++++-----------
 3 files changed, 9 insertions(+), 11 deletions(-)
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base-commit: 4e2600bca665197acb537ae63f24d3075e6bac8b
change-id: 20240530-piix4-spd-39c156b22959

Best regards,