linux-kernel - Re: [PATCH] drivers: firmware: psci: use kernel restart handler functionality

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Message-ID: <20191014100756.GA4028@bogus>
Date:   Mon, 14 Oct 2019 11:07:56 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Stefan Agner <stefan@...er.ch>
Cc:     mark.rutland@....com, lorenzo.pieralisi@....com,
        Stefan Agner <stefan.agner@...adex.com>,
        Sudeep Holla <sudeep.holla@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] drivers: firmware: psci: use kernel restart handler
 functionality

On Sat, Oct 12, 2019 at 11:47:35PM +0200, Stefan Agner wrote:
> From: Stefan Agner <stefan.agner@...adex.com>
> 
> Use the kernels restart handler to register the PSCI system reset
> capability. The restart handler use notifier chains along with
> priorities. This allows to use restart handlers with higher priority
> (in case available) while still supporting PSCI.
> 
> Since the ARM handler had priority over the kernels restart handler
> before this patch, use a slightly elevated priority of 160 to make
> sure PSCI is used before most of the other handlers are called.
> 

There's an attempt(rather pull request[1]) to consolidate these into new
system power/restart handler.

--
Regards,
Sudeep

[1] https://lore.kernel.org/linux-arm-kernel/20191002131228.4085560-1-thierry.reding@gmail.com