[Qemu-commits] [qemu/qemu] 1cbab8: hw/nvram: at24 return 0xff if 1 byte address

[Peter Maydell]

  Branch: refs/heads/master
  Home:   https://github.com/qemu/qemu
  Commit: 1cbab82e9d1bdb2c7b9ef46a396fdc03ea3fa04c
      
https://github.com/qemu/qemu/commit/1cbab82e9d1bdb2c7b9ef46a396fdc03ea3fa04c
  Author: Patrick Venture <venture@google.com>
  Date:   2022-03-14 (Mon, 14 Mar 2022)

  Changed paths:
    M hw/nvram/eeprom_at24c.c

  Log Message:
  -----------
  hw/nvram: at24 return 0xff if 1 byte address

The at24 eeproms are 2 byte devices that return 0xff when they are read
from with a partial (1-byte) address written.  This distinction was
found comparing model behavior to real hardware testing.

Tested: `i2ctransfer -f -y 45 w1@85 0 r1` returns 0xff instead of next
byte

Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211220212137.1244511-1-venture@google.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>


  Commit: 352998df1c53b366413690d95b35f76d0721ebed
      
https://github.com/qemu/qemu/commit/352998df1c53b366413690d95b35f76d0721ebed
  Author: Peter Maydell <peter.maydell@linaro.org>
  Date:   2022-03-14 (Mon, 14 Mar 2022)

  Changed paths:
    M hw/nvram/eeprom_at24c.c

  Log Message:
  -----------
  Merge tag 'i2c-20220314' of https://github.com/philmd/qemu into staging

I2C patch queue

- Fix AT24 EEPROM partial write (Patrick Venture)

# gpg: Signature made Mon 14 Mar 2022 13:50:01 GMT
# gpg:                using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" 
[unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD  6BB2 E3E3 2C2C DEAD C0DE

* tag 'i2c-20220314' of https://github.com/philmd/qemu:
  hw/nvram: at24 return 0xff if 1 byte address

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>


Compare: https://github.com/qemu/qemu/compare/15df33ceb73c...352998df1c53