linux-kernel - Re: [PATCH v8 2/4] soc: qcom: Add AOSS QMP driver

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Message-ID: <20190603153440.GT15118@vkoul-mobl>
Date:   Mon, 3 Jun 2019 21:04:40 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Doug Anderson <dianders@...omium.org>,
        Arun Kumar Neelakantam <aneela@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/4] soc: qcom: Add AOSS QMP driver

On 30-05-19, 20:00, Bjorn Andersson wrote:
> The Always On Subsystem (AOSS) Qualcomm Messaging Protocol (QMP) driver
> is used to communicate with the AOSS for certain side-channel requests,
> that are not available through the RPMh interface.
> 
> The communication is a very simple synchronous mechanism of messages
> being written in message RAM and a doorbell in the AOSS is rung. As the
> AOSS has processed the message length is cleared and an interrupt is
> fired by the AOSS as acknowledgment.
> 
> The driver exposes the QDSS clock as a clock and the low-power state
> associated with the remoteprocs in the system as a set of power-domains.

Reviewed-by: Vinod Koul <vkoul@...nel.org>

-- 
~Vinod