linux-kernel - Re: [PATCH v5 4/8] interconnect: qcom: Add RPM communication

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Date:   Sun, 1 Jul 2018 14:16:05 +0300
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     Evan Green <evgreen@...omium.org>
Cc:     linux-pm@...r.kernel.org, gregkh@...uxfoundation.org,
        rjw@...ysocki.net, robh+dt@...nel.org,
        Michael Turquette <mturquette@...libre.com>,
        khilman@...libre.com, Vincent Guittot <vincent.guittot@...aro.org>,
        Saravana Kannan <skannan@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        amit.kucheria@...aro.org, seansw@....qualcomm.com,
        daidavid1@...eaurora.org, mark.rutland@....com,
        lorenzo.pieralisi@....com, abailon@...libre.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v5 4/8] interconnect: qcom: Add RPM communication

Hi Evan,

On 06/26/2018 11:47 PM, Evan Green wrote:
> Hi Georgi,
> 
> On Wed, Jun 20, 2018 at 5:11 AM Georgi Djakov <georgi.djakov@...aro.org> wrote:
>>
>> On some Qualcomm SoCs, there is a remote processor, which controls some of
>> the Network-On-Chip interconnect resources. Other CPUs express their needs
>> by communicating with this processor. Add a driver to handle comminication
>> with this remote processor.
>>
>> Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
>> ---

[..]

>> diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile
>> new file mode 100644
>> index 000000000000..2a0c41db91c4
>> --- /dev/null
>> +++ b/drivers/interconnect/qcom/Makefile
>> @@ -0,0 +1,2 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +obj-y += smd-rpm.o
> 
> This new file has an unexpressed dependency on CONFIG_QCOM_SMD_RPM due
> to qcom_rpm_smd_write. RPMh-based systems won't need this file, right?
> Maybe this file should live behind some config?

Right, I just made this a separate config, as the the kbuild bot also
reported an issue with the modular build.

[..]

>> diff --git a/drivers/interconnect/qcom/smd-rpm.h b/drivers/interconnect/qcom/smd-rpm.h
>> new file mode 100644
>> index 000000000000..0f4a3da31cf6
>> --- /dev/null
>> +++ b/drivers/interconnect/qcom/smd-rpm.h
>> @@ -0,0 +1,15 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Copyright (c) 2018, Linaro Ltd.
>> + * Author: Georgi Djakov <georgi.djakov@...aro.org>
>> + */
>> +
>> +#ifndef __LINUX_INTERCONNECT_QCOM_RPM_H
>> +#define __LINUX_INTERCONNECT_QCOM_RPM_H
> 
> This doesn't really reflect the path, should this be something different?

Will update!

Thanks,
Georgi