[PATCH UCC TDM 1/3 Updated] Platform changes for UCC TDM driver for MPC8323eRDB. Also includes related QE changes and dts entries.
timur at freescale.com
Fri Jan 25 02:55:31 EST 2008
Anton Vorontsov wrote:
> Can we not introduce new pio-maps in the device trees? There
> were debates regarding this, and if I understood everything
> correctly, pio-maps considered as a bad taste. Better
> do bunch of par_io_config_pin() in the board file. Better
> yet fixup the firmware (u-boot) to set up dedicated pins
I'm on the fence with respect to pio-maps vs. par_io_config_pin() calls. The
problem is that the configuration of these pins is board-specific, but pins are
used by devices. A device driver can't call par_io_config_pin(), because the
calls are different depending on which SoC and which UCC you're using. The
platform code can't call par_io_config_pin(), because that configuration depends
on which drivers are loaded.
In other words, the pin configurations are dependent on the UCC configurations,
and the UCC configurations are stored in the device tree. So it makes sense to
put the pin configurations in the device tree, too.
Linux kernel developer at Freescale
More information about the Linuxppc-dev