linux-kernel - Re: [PATCH 1/6] mailbox: Add new API mbox_channel

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Message-ID: <CAALAos-BGyad53wrr6d+6LB0fiSi-PhTSzUJOsPT0-J3402OpQ@mail.gmail.com>
Date:   Mon, 6 Feb 2017 09:57:12 +0530
From:   Anup Patel <anup.patel@...adcom.com>
To:     Jassi Brar <jassisinghbrar@...il.com>
Cc:     Vinod Koul <vinod.koul@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Dan Williams <dan.j.williams@...el.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        Rob Rice <rob.rice@...adcom.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        dmaengine@...r.kernel.org,
        Devicetree List <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-crypto@...r.kernel.org,
        linux-raid <linux-raid@...r.kernel.org>
Subject: Re: [PATCH 1/6] mailbox: Add new API mbox_channel_device() for clients

On Fri, Feb 3, 2017 at 5:35 PM, Jassi Brar <jassisinghbrar@...il.com> wrote:
> On Thu, Feb 2, 2017 at 10:17 AM, Anup Patel <anup.patel@...adcom.com> wrote:
>> The remote processor can have DMAENGINE capabilities and client
>> can pass data to be processed via main memory. In such cases,
>> the client will require DMAble memory for remote processor.
>>
>> This patch adds new API mbox_channel_device() which can be
>> used by clients to get struct device pointer of underlying
>> mailbox controller. This struct device pointer of mailbox
>> controller can be used by clients to allocate DMAble memory
>> for remote processor.
>>
> IIUC, DT already provides a way for what you need.

Thanks for the suggestion. I will explore in this direction and
try to avoid this patch in next revision.

Can you please have a look at FlexRM driver which I
had submitted previously?
https://lkml.org/lkml/2017/1/5/291
https://lkml.org/lkml/2017/1/5/293

Regards,
Anup