linux-kernel - Re: [PATCH 2/3] pm: add FSM configuration for deep sleep

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Date:	Sun, 28 Sep 2014 17:53:16 +0800
From:	Chenhui Zhao <chenhui.zhao@...escale.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	<kernel@...gutronix.de>, <linux-kernel@...r.kernel.org>,
	<Zhuoyu.Zhang@...escale.com>, <Jason.Jin@...escale.com>,
	<leoli@...escale.com>, <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/3] pm: add FSM configuration for deep sleep

On Fri, Sep 26, 2014 at 09:51:53PM +0100, Russell King - ARM Linux wrote:
> On Fri, Sep 26, 2014 at 01:02:01PM +0100, Russell King - ARM Linux wrote:
> > On Fri, Sep 26, 2014 at 07:25:02PM +0800, Chenhui Zhao wrote:
> > > +void fsm_write32(void __iomem *addr, u32 val)
> > > +{
> > > +#ifdef __arm__
> > > +	iowrite32be(val, addr);
> > > +#endif
> > > +
> > > +#ifdef __powerpc__
> > > +	out_be32(addr, val);
> > > +#endif
> > 
> > The idea of iowrite* is that it should be able to address MMIO or IO
> > memory irrespective of the platform.  Why is PowerPC not implementing
> > this accessor, or why can't it be used for PowerPC?
> > 
> > This should just use iowrite32be(), and if it doesn't work on PowerPC,
> > PowerPC needs to be fixed.
> 
> BenH tells me that this should be able to use iowrite32be() on PowerPC
> too without problems, there should be no need to use the older out_be32()
> accessors here.  Please can you look into using only iowrite32be() here?
> 
> Thanks.
> 

Thanks. I'll fix it.

Chenhui
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