Messages in this thread | | | Subject | Re: [PATCH v7 2/4] soc: qcom: Add AOSS QMP driver | From | Sai Prakash Ranjan <> | Date | Sat, 25 May 2019 23:23:33 +0530 |
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On 5/1/2019 10:07 AM, 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. > > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > > Changes since v6: > - Squash the pd into the same driver as the communication, to simplify > the interaction. > - Representing the QDSS clocks as a clock/power domain turns out to > cascade into a request to make all Coresight drivers have a secondary > compatible to replace the required bus clock with a required power > domain. So in v7 this is exposed as a clock instead. > - Some error checking updates, as reported by Doug. >
Thanks for the patch Bjorn. Tested the QDSS functionality on SDM845 based Cheza board with this change and it works just fine.
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
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