Update the I2C controller logic to be more consistent with the
newer version of the controller reference manual.
This makes it work better on modern LS/LX platforms and avoids
unnecessary delays. Also fixes a lock leak.
Tested by: bz (LS1088a FDT), Pierre-Luc Drouin (Honeycomb, ACPI)
(cherry picked from commit 44847114bd4c61ed3dfcc879fa0d7deb452e12d3)
Move the code from the arm specific to the iicbus controller directory.
Split up between general logic and bus attachment code.
Add support for ACPI attachment in addition to FDT.
Tested by: bz (LS1088a FDT), Pierre-Luc Drouin (Honeycomb, ACPI)
Based on: D24917 by Val Packett (initial early version)
(cherry picked from commit 5ca8e32633c4ffbbcd6762e5888b6a4ba0708c6c)
This IP is found in Xilinx SoC, it only been tested on ZynqMP (arm64)
so only enable it there for now.
Differential Revision: https://reviews.freebsd.org/D41994
(cherry picked from commit 137b58e4d2044adc200d13c8989d3746a0a4bd7f)
The folder is a mess so start moving stuff into sub-directories.
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D41907
(cherry picked from commit 580d00f42fdd94ce43583cc45fe3f1d9fdff47d4)
