From mboxrd@z Thu Jan  1 00:00:00 1970
From: Leo Yan <leo.yan@linaro.org>
Subject: Re: [PATCH v4 2/4] mailbox: Hi6220: add mailbox driver
Date: Fri, 16 Oct 2015 13:29:10 +0800
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To: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>, Ian Campbell <ijc+devicetree@hellion.org.uk>, Kumar Gala <galak@codeaurora.org>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Bintian Wang <bintian.wang@huawei.com>, Yiping Xu <xuyiping@hisilicon.com>, Haojian Zhuang <haojian.zhuang@linaro.org>, Wei Xu <xuwei5@hisilicon.com>, Devicetree List <devicetree@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>
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On Fri, Oct 16, 2015 at 10:43:00AM +0530, Jassi Brar wrote:
> On Mon, Oct 12, 2015 at 10:02 PM, Leo Yan <leo.yan@linaro.org> wrote:
> 
> > +
> > +#define MBOX_CHAN_MAX                  32
> > +#define MBOX_CHAN_NUM                  2
> > +
> You mean the hardware has 32 channels but this driver can not manage
> more than 2 ?
> 
> OR, there are 32 interfaces but only 2 physical 'floating' links, so
> no more than 2 interfaces can be active at any time?

For the later case. Mailbox also can be used by other modules, such
like audio hifi; later need add links for them if want to enable
audio. But so far only uses first 2 channels.

Thanks,
Leo Yan