#1626 closed defect
Can't seek in i2c eeprom devices
Reported by: | Angus Gratton | Owned by: | Sebastian Huber |
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Priority: | normal | Milestone: | 4.11 |
Component: | score | Version: | 4.10 |
Severity: | normal | Keywords: | |
Cc: | gedare@…, nick.withers@… | Blocked By: | |
Blocking: |
Description (last modified by Joel Sherrill)
lseek() doesn't seem to work when reading an I2C EEPROM on MVME3100 (PowerPC).
To reproduce:
- Open EEPROM device
- lseek() to some other offset
- Read from EEPROM device
The read will complete as if the lseek() never occured.
Looking at the underlying i2c read functions in cpukit, I don't see any reference to offset, so I'm guessing this is unimplemented for I2C reads.
However, it appears that it did once work (EPICS on RTEMS uses lseek() to read NVRAM values from I2C EEPROM.)
Cheers - Angus
Attachments (1)
Change History (7)
comment:1 Changed on 07/20/10 at 04:54:44 by Angus Gratton
Summary: | Can't seek i2c eeprom reads → Can't seek in i2c eeprom devices |
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comment:2 Changed on 08/13/13 at 08:36:35 by Nick Withers
Cc: | Nick Withers added |
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Changed on 12/05/13 at 02:41:39 by Nick Withers
Attachment: | RTEMS Ticket 2139.patch added |
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comment:3 Changed on 12/05/13 at 13:58:54 by Gedare Bloom
attachments.isobsolete: | 0 → 1 |
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comment:4 Changed on 12/05/13 at 13:59:50 by Gedare Bloom
Cc: | Gedare Bloom added |
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Replying to comment:2:
Please ignore this attachment and comment, my apologies, they were intended for
another ticket
I marked the attachment obsolete.
comment:5 Changed on 11/23/14 at 16:18:55 by Joel Sherrill
Description: | modified (diff) |
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Owner: | changed from Joel Sherrill to Sebastian Huber |
Status: | new → assigned |
Nick.. please comment on the state of this. Do you have a new patch?
Sebastian.. is this still an issue?
comment:6 Changed on 11/24/14 at 07:51:21 by Sebastian Huber
Resolution: | → wontfix |
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Status: | assigned → closed |
Something went wrong with the Bugzilla to trac conversion. The patch is completely unrelated to this ticket.
I will not work on a fixes for libi2c stuff. I suggest to use the new I2C framework. The new I2C EEPROM device supports lseek().
Fix error return inconsistencies