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Subject: Re: [PATCHv2 0/3] arm64 xilinx zynqmp firmware interface
To: Michal Simek <michal.simek@xilinx.com>,
        linux-arm-kernel@lists.infradead.org, Arnd Bergmann <arnd@arndb.de>
Cc: edgar.iglesias@xilinx.com, Rob Herring <robh@kernel.org>,
        Punnaiah Choudary Kalluri 
        <punnaiah.choudary.kalluri@xilinx.com>,
        Jean Delvare <jdelvare@suse.de>,
        Dinh Nguyen <dinguyen@opensource.altera.com>,
        Rob Herring <robh+dt@kernel.org>, Tero Kristo <t-kristo@ti.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Olof Johansson <olof@lixom.net>,
        =?UTF-8?Q?S=c3=b6ren_Brinkmann?= <soren.brinkmann@xilinx.com>,
        Kevin Hilman <khilman@baylibre.com>, Nishanth Menon <nm@ti.com>,
        Thierry Reding <treding@nvidia.com>,
        Kevin Brodsky <kevin.brodsky@arm.com>,
        Will Deacon <will.deacon@arm.com>, devicetree@vger.kernel.org,
        Alexander Graf <agraf@suse.de>, Sudeep Holla <sudeep.holla@arm.com>,
        Moritz Fischer <mdf@kernel.org>, Michal Simek <monstr@monstr.eu>,
        Mark Rutland <mark.rutland@arm.com>, Carlo Caione <carlo@endlessm.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        linux-kernel@vger.kernel.org,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
References: <cover.1502886277.git.michal.simek@xilinx.com>
From: Marc Zyngier <marc.zyngier@arm.com>
Organization: ARM Ltd
Message-ID: <43deeed7-32c8-7914-5f44-862ebbe14a3b@arm.com>
Date: Wed, 16 Aug 2017 16:39:49 +0100
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On 16/08/17 13:24, Michal Simek wrote:
> Hi,
> 
> xilinx is using this interface for very long time and we can't merge our
> driver changes to Linux because of missing communication layer with
> firmware. This interface was developed before scpi and scmi was
> available. In connection to power management scpi and scmi are missing
> pieces which we already use. There is a separate discussion how to
> extend scmi to support all our use cases.

So maybe we should wait and see where this discussion is going before we
merge yet another firmware interface?

> This simply patch is not adding any power management features but only
> adding minimum functionality which are needed for drivers.

I don't get it. 600 lines of firmware interface that isn't used by
anything? Or is it? Needed by which driver?

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...