Re: [PATCH 1/4] mailbox: add support for System Control and Power Interface(SCPI) protocol

From: Jassi Brar
Date: Wed May 13 2015 - 12:52:50 EST

On Mon, Apr 27, 2015 at 5:10 PM, Sudeep Holla <sudeep.holla@xxxxxxx> wrote:
> This patch adds support for System Control and Power Interface (SCPI)
> Message Protocol used between the Application Cores(AP) and the System
> Control Processor(SCP). The MHU peripheral provides a mechanism for
> inter-processor communication between SCP's M3 processor and AP.
> SCP offers control and management of the core/cluster power states,
> various power domain DVFS including the core/cluster, certain system
> clocks configuration, thermal sensors and many others.
> This protocol driver provides interface for all the client drivers using
> SCPI to make use of the features offered by the SCP.
Is the SCPI specification available somewhere to look into?

> Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> CC: Jassi Brar <jassisinghbrar@xxxxxxxxx>
> Cc: Liviu Dudau <Liviu.Dudau@xxxxxxx>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Cc: Jon Medhurst (Tixy) <tixy@xxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> ---
> .../devicetree/bindings/mailbox/arm,scpi.txt | 121 ++++
> drivers/mailbox/Kconfig | 19 +
> drivers/mailbox/Makefile | 2 +
> drivers/mailbox/scpi_protocol.c | 694 +++++++++++++++++++++
Why in drivers/mailbox/ ? This is a 'consumer' driver and seems
Juno(ARM) specific.

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