Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH V9 2/2] mailbox: introduce ARM SMC based mailbox
To:     Peng Fan <peng.fan@nxp.com>,
        "robh+dt@kernel.org" <robh+dt@kernel.org>,
        "mark.rutland@arm.com" <mark.rutland@arm.com>,
        "jassisinghbrar@gmail.com" <jassisinghbrar@gmail.com>,
        "sudeep.holla@arm.com" <sudeep.holla@arm.com>,
        "andre.przywara@arm.com" <andre.przywara@arm.com>
Cc:     "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        dl-linux-imx <linux-imx@nxp.com>
References: <1569377224-5755-1-git-send-email-peng.fan@nxp.com>
 <1569377224-5755-3-git-send-email-peng.fan@nxp.com>
From:   Florian Fainelli <f.fainelli@gmail.com>
Message-ID: <9dff720e-2e81-a7b8-ff52-1f2c3d257368@gmail.com>
Date:   Thu, 26 Sep 2019 19:39:26 -0700
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.1.1
MIME-Version: 1.0
In-Reply-To: <1569377224-5755-3-git-send-email-peng.fan@nxp.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 9/24/2019 7:09 PM, Peng Fan wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> This mailbox driver implements a mailbox which signals transmitted data
> via an ARM smc (secure monitor call) instruction. The mailbox receiver
> is implemented in firmware and can synchronously return data when it
> returns execution to the non-secure world again.
> An asynchronous receive path is not implemented.
> This allows the usage of a mailbox to trigger firmware actions on SoCs
> which either don't have a separate management processor or on which such
> a core is not available. A user of this mailbox could be the SCP
> interface.
> 
> Modified from Andre Przywara's v2 patch
> https://lore.kernel.org/patchwork/patch/812999/
> 
> Cc: Andre Przywara <andre.przywara@arm.com>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>

Thanks for your persistence working on this!
-- 
Florian