linux-kernel - Re: [PATCH 08+09/24] ARM: ixp4xx: use _

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Date:	Tue, 18 Sep 2012 21:25:44 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Will Deacon <will.deacon@....com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Nicolas Pitre <nico@...aro.org>, Imre Kaloz <kaloz@...nwrt.org>
Subject: Re: [PATCH 08+09/24] ARM: ixp4xx: use __iomem pointers for MMIO

On Tuesday 18 September 2012, Krzysztof Halasa wrote:
> > @@ -51,7 +52,7 @@ static inline u32 ixp4xx_read_feature_bits(void)
> >  
> >  static inline void ixp4xx_write_feature_bits(u32 value)
> >  {
> > -     *IXP4XX_EXP_CFG2 = ~value;
> > +     __raw_writel(~cpu_to_le32(value), IXP4XX_EXP_CFG2);
> >  }
> 
> The EXP_CFG2 register is already in host order, no need for
> cpu_to_le32() as the replaced code clearly shows.
> 
> Can you merge both IXP4xx parts (in the two patches) and fix the above,
> please? Thanks.

Thanks for pointing this out, that was a mistake on my end, because I first
tried to convert to writel, with byteswap and then made up my mind and used
__raw_writel instead because it seemed silly to do two byteswaps.

	Arnd
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