linux-kernel - Re: [PATCH v3 00/13] ARM: at91: PMC driver rework

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Message-ID: <20151215092248.GA8574@piout.net>
Date:	Tue, 15 Dec 2015 10:22:48 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Stephen Boyd <sboyd@...eaurora.org>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Michael Turquette <mturquette@...libre.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 00/13] ARM: at91: PMC driver rework

Stephen,

Do you mind us taking that through the at91 and arm-soc trees?


On 10/12/2015 at 18:06:52 +0100, Boris Brezillon wrote :
> On Fri,  4 Dec 2015 18:03:35 +0100
> Alexandre Belloni <alexandre.belloni@...e-electrons.com> wrote:
> 
> > Hi,
> > 
> > This patch set is a cleanup that properly separate drivers needing to access the
> > PMC (PM and USB) from the clock driver by exposing the PMC as a syscon.
> > 
> > This also allows to implement a fix for preempt-rt. Currently, at91 platform are
> > crashing when using preempt-rt because the irq handler are transformed in
> > threaded irq handler but at the time the pmc registers its clocks, it is not
> > possible to creat threads, leading to a NULL pointer dereference in the kernel.
> > 
> > The new infrastructure uses polling until it is late enough to register threaded
> > irqs.
> > 
> > Note that there is an ugly global spinlock for the peripheral and generated
> > clocks. More infrastructure is needed in syscon to get rid of that one. We will
> > be working on that.
> 
> To the whole series,
> 
> Acked-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> 
-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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