[PATCH v4 0/3] Apple Mailbox Controller support

From: Sven Peter
Date: Mon Oct 25 2021 - 02:22:20 EST


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@xxxxxxxxxxxxx/
v2: https://lore.kernel.org/lkml/20210916154911.3168-1-sven@xxxxxxxxxxxxx/
v3: https://lore.kernel.org/lkml/20211017114054.67737-1-sven@xxxxxxxxxxxxx/

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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