CVS log for src/sys/dev/fdt/fdt_i2c.c

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API naming consistency.  NFC.

Port over the changes from thorpej-i2c-spi-conf to thorpej-i2c-spi-conf2,
which is based on a newer HEAD revision.

Merge thorpej-cfargs2.

Adapt to CFARGS().

fdtbus_attach_i2cbus() is no longer anything other than a wrapper around
config_found(); just get rid of it and make its callers look like all of
the other I2C controller drivers.

- Don't call of_enter_i2c_devs() -- it no longer exists.
- Pass along the provided devhandle to the i2c bus instance.

XXX fdtbus_attach_i2cbus() is now just a thin wrapper around config_found()
and should probably just go away in favor of making FDT-attached i2c
controller drivers consistent with everyone else.

Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
  actually needed.
- Don't be explicit about what interface attribute is attaching if
  the device only has one.  (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
  situations, making is visibly easier to see when indirect config is
  in play, and allowing for future change in semantics.  (As of now,
  this is just a wrapper around config_match(), but that is an
  implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance.  This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

config_found_ia() -> config_found() w/ CFARG_IATTR.

Sync w/ HEAD.

Change fdtbus_register_i2c_controller() to directly register the i2c_tag_t,
rather than the device and a set of functions (the only of which was to
return the i2c_tag_t anyway).  Previously, this assumed only a single
i2c controller node per device_t, which is not true with an i2c mux.

i2c-indirect-config == false  -->  i2c-no-indirect-config == true

Sync with HEAD

Fix leak of iba.iba_child_devices in fdtbus_attach_i2cbus().  Patch
provided by yarl-baudig %%at%% mailoo.org

Add support for Allwinner A64's display pipeline.

Ssync with HEAD

Set "i2c-indirect-config" to false in the right place so that iic(4)
better behaves itself.

Sync with HEAD

Add fdtbus_attach_i2cbus, used to attach an i2cbus to an fdt device node.

Use queue(3) API to manage lists. NFCI.

update from HEAD

Sync with HEAD (as of 26th Dec)

file fdt_i2c.c was added on branch tls-maxphys on 2017-12-03 11:37:01 +0000

file fdt_i2c.c was added on branch nick-nhusb on 2015-12-27 12:09:49 +0000

Only OF_* functions should be in fdt_openfirm.c, move the rest to fdt_subr.c.

split gpio, i2c, intr, and regulator helpers into separate files