Arm SCMI updates for v6.10
1. Basic support for SCMI v3.2 pincontrol protocol
SCMI v3.2 introduces pincontrol protocol which is intended for
controlling pins and their configuration. The pin control protocol
provides commands to:
- List the pins, groups of pins, available functions, and their
association with each other.
- Set the parameter configuration and multiplexing of the pins or
groups of pins
- Optionally request exclusive access to a pin or group of pins.
- Optionally configure the permissions of an agent to access a pin
or group of pins.
These changes adds basic support for the same in the SCMI core layer
and an implementation of the generic scmi-pinctrl driver with associated
DT bindings.
2. Framework support for multiple vendors custom protocols
With the fixed space for vendor protocols, the possibility of having
multiple vendors implementing distinct SCMI vendor protocols with
the same overlapping protocol number is very high and with the need
to support them all in a single kernel image or a module is also high.
In order to implement the same we assume:
- vendor protocols has to be tagged at build time with a vendor_id
- vendor protocols could also optionally be tagged at build time with
sub_vendor_id and implementation version
At the initialisation all the built vendor protocols are registered
with the SCMI core using a key derived from the above tags
3. Logging and tracing improvements
This includes using dev_err_probe() to bail out from probe, adding
message dump traces for bad and unexpected replies and widening of
the tag buffer in trace_scmi_dump_msg to allow diverse tag names
4. Miscellaneous updates or improvements
This includes adding the accessor function get_max_msg_size() used
in pinctl protocol, updation of dt-bindings examples for protocol@13
to promote new bindings and simplification of scmi_devm_notifier_unregister
pinctrl: Implementation of the generic scmi-pinctrl driver
scmi-pinctrl driver implements pinctrl driver interface and using
SCMI protocol to redirect messages from pinctrl subsystem SDK to
SCMI platform firmware, which does the changes in HW.
Co-developed-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>
Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20240418-pinctrl-scmi-v11-4-499dca9864a7@nxp.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 files changed
