Hello,
I need to know about the I2C device support for ArchLinux ARM.
* Generally, am somewhat familiar with the Linux everything-is-a-file-
descriptor approach.
* Followed by we have an I2C device exposed as a device through /dev/i2c-0 file.
* No grouping or any other perms going on (yet), all at the root level
access (for now).
After which, questions about concurrency.
* I gather the usual file handling rules apply using open() and close().
* For a process (service, utility, whatever) to access the bus, must
open using open("/dev/i2c-0", O_RDWR).
* What about for multiple processes (services, utilities, watchdogs,
etc)? O_RDWR | O_DSYNC?
I assume there needs to be more of a synchronization integrity check going on?
Regards,
Michael Powell
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