On Wed, Sep 09, 2020 at 06:44:00PM +0200, Etienne Carriere wrote: > This change introduces SCMI agent uclass to interact with a firmware > using the SCMI protocols [1]. > > SCMI agent uclass currently supports a single method to request > processing of the SCMI message by an identified server. A SCMI message > is made of a byte payload associated to a protocol ID and a message ID, > all defined by the SCMI specification [1]. On return from process_msg() > method, the caller gets the service response. > > SCMI agent uclass defines a post bind generic sequence for all devices. > The sequence binds all the SCMI protocols listed in the FDT for that > SCMI agent device. Currently none, but later change will introduce > protocols. > > This change implements a simple sandbox device for the SCMI agent uclass. > The sandbox nicely answers SCMI_NOT_SUPPORTED to SCMI messages. > To prepare for further test support, the sandbox exposes a architecture > function for test application to read the sandbox emulated devices state. > Currently supports 2 SCMI agents, identified by an ID in the FDT device > name. The simplistic DM test does nothing yet. > > SCMI agent uclass is designed for platforms that embed a SCMI server in > a firmware hosted somewhere, for example in a companion co-processor or > in the secure world of the executing processor. SCMI protocols allow an > SCMI agent to discover and access external resources as clock, reset > controllers and more. SCMI agent and server communicate following the > SCMI specification [1]. This SCMI agent implementation complies with > the DT bindings defined in the Linux kernel source tree regarding > SCMI agent description since v5.8. > > Links: [1] > https://developer.arm.com/architectures/system-architectures/software-standards/scmi > Signed-off-by: Etienne Carriere <etienne.carri...@linaro.org> > Cc: Simon Glass <s...@chromium.org> > Cc: Peng Fan <peng....@nxp.com> > Cc: Sudeep Holla <sudeep.ho...@arm.com> > Reviewed-by: Simon Glass <s...@chromium.org>
Applied to u-boot/next, thanks! -- Tom
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