This patch introduces support for I3C slave mode, which is referenced
with a PCIe Endpoint system. It also establishes a configuration framework
(configfs) for the I3C slave controller driver and the I3C slave function
driver
Typic usage as
The user can configure the i3c-slave-tty device using configfs entry. In
order to change the vendorid, the following commands can be used
# echo 0x011b > functions/tty/func1/vendor_id
# echo 0x1000 > functions/tty/func1/part_id
# echo 0x6 > functions/tty/t/bcr
Binding i3c-slave-tty Device to slave Controller
------------------------------------------------
In order for the slave function device to be useful, it has to be bound to
a I3C slave controller driver. Use the configfs to bind the function
device to one of the controller driver present in the system::
# ln -s functions/pci_epf_test/func1 controllers/44330000.i3c-slave/
Host side:
cat /dev/ttyI3C0
Slave side:
echo abc >/dev/ttyI3C0
Master side patch:
https://lore.kernel.org/imx/20231018211111.3437929-1-Frank.Li@xxxxxxx/T/#u
Frank Li (5):
i3c: add slave mode support
dt-bindings: i3c: svc: add compatible string i3c: silvaco,i3c-slave
i3c: slave: add svc slave controller support
i3c: slave: func: add tty driver
Documentation: i3c: Add I3C slave mode controller and function
.../bindings/i3c/silvaco,i3c-master.yaml | 8 +-
Documentation/driver-api/i3c/index.rst | 1 +
.../driver-api/i3c/slave/i3c-slave-cfs.rst | 109 +++
.../driver-api/i3c/slave/i3c-slave.rst | 189 +++++
.../driver-api/i3c/slave/i3c-tty-function.rst | 103 +++
.../driver-api/i3c/slave/i3c-tty-howto.rst | 109 +++
Documentation/driver-api/i3c/slave/index.rst | 13 +
drivers/i3c/Kconfig | 30 +
drivers/i3c/Makefile | 4 +
drivers/i3c/func/Kconfig | 9 +
drivers/i3c/func/Makefile | 3 +
drivers/i3c/func/tty.c | 548 ++++++++++++
drivers/i3c/i3c-cfs.c | 389 +++++++++
drivers/i3c/slave.c | 453 ++++++++++
drivers/i3c/slave/Kconfig | 9 +
drivers/i3c/slave/Makefile | 4 +
drivers/i3c/slave/svc-i3c-slave.c | 795 ++++++++++++++++++
include/linux/i3c/slave.h | 503 +++++++++++
18 files changed, 3276 insertions(+), 3 deletions(-)
create mode 100644 Documentation/driver-api/i3c/slave/i3c-slave-cfs.rst
create mode 100644 Documentation/driver-api/i3c/slave/i3c-slave.rst
create mode 100644 Documentation/driver-api/i3c/slave/i3c-tty-function.rst
create mode 100644 Documentation/driver-api/i3c/slave/i3c-tty-howto.rst
create mode 100644 Documentation/driver-api/i3c/slave/index.rst
create mode 100644 drivers/i3c/func/Kconfig
create mode 100644 drivers/i3c/func/Makefile
create mode 100644 drivers/i3c/func/tty.c
create mode 100644 drivers/i3c/i3c-cfs.c
create mode 100644 drivers/i3c/slave.c
create mode 100644 drivers/i3c/slave/Kconfig
create mode 100644 drivers/i3c/slave/Makefile
create mode 100644 drivers/i3c/slave/svc-i3c-slave.c
create mode 100644 include/linux/i3c/slave.h
--
2.34.1
