[PATCH v4 0/3] Apple Mailbox Controller support

[Sven Peter <sven@svenpeter.dev>]

Hi,

This is the fourth version of my series which adds support for the mailbox
controllers found on the Apple M1.

v1: https://lore.kernel.org/lkml/20210907145501.69161-1-sven@svenpeter.dev/
v2: https://lore.kernel.org/lkml/20210916154911.3168-1-sven@svenpeter.dev/
v3: https://lore.kernel.org/lkml/20211017114054.67737-1-sven@svenpeter.dev/

Changes from v3 to v4:
 - dropped minItems: 4 from the bindings
 - added back of_xlate since the mailbox core only supports #mbox-cells = <1>
   but this mailbox uses #mbox-cells = <0>
 - Split of the MAINTAINERS changes to a separate file since we have quite a few
   changes in flight and there will likely be conflicts once the pull requests
   from various subsystems are sent to Linus

Changes from v2 to v3:
 - removed dma barriers since the mbox client will take care of these
 - moved the of_device_id table and related code to the bottom of the file
 - removed of_xlate
 - dropped clock handling from the code and the binding since we now understand
   that these are actually power domains

Changes from v1 to v2:
 - switched to txdone_irq instead of introducing a new mode
 - switched to a threaded interrupt handler for receiving messages
 - added co-processor examples to the device tree binding
 - reformatted the register defines and clarified multiple comments

Best,

Sven

Sven Peter (3):
  MAINTAINERS: Add Apple mailbox files
  dt-bindings: mailbox: Add Apple mailbox bindings
  mailbox: apple: Add driver for Apple mailboxes

 .../bindings/mailbox/apple,mailbox.yaml       |  77 ++++
 MAINTAINERS                                   |   3 +
 drivers/mailbox/Kconfig                       |  12 +
 drivers/mailbox/Makefile                      |   2 +
 drivers/mailbox/apple-mailbox.c               | 384 ++++++++++++++++++
 include/linux/apple-mailbox.h                 |  19 +
 6 files changed, 497 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
 create mode 100644 drivers/mailbox/apple-mailbox.c
 create mode 100644 include/linux/apple-mailbox.h

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2.25.1