linux-kernel - Re: [PATCH] ARM: davinci: da8xx_register_spi() should not register SPI board info

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Message-ID: <1354122607.6612.6.camel@trivette.mtl.sfl>
Date:	Wed, 28 Nov 2012 12:10:07 -0500
From:	Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To:	Sekhar Nori <nsekhar@...com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Russell King <linux@....linux.org.uk>,
	Kevin Hilman <khilman@...com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: davinci: da8xx_register_spi() should not register
 SPI board info

Hi Sekhar,

On Wed, 2012-11-28 at 14:19 +0530, Sekhar Nori wrote:
> Hi Vivien,
> 
> On 9/11/2012 5:59 AM, Vivien Didelot wrote:
> > Without this patch, da8xx_register_spi() registers the SPI board info,
> > the SPI controller, and sets its number of chipselect to the size of the
> > static spi_board_info array. This is bad because a SPI board info may
> > declare devices for different SPI buses, and because other code can also
> > call spi_register_board_info() (e.g. a daughter board might provide
> > additional SPI devices).
> > 
> > This patch removes the spi_register_board_info() call from
> > da8xx_register_spi(), renames this last one to da8xx_register_spi_bus()
> > to be more explicit, takes the number of chipselect as a function
> > parameter, and updates the impacted board-da8{3,5}0-evm.c, and
> > board-mityomapl138.c files accordingly. It also sets the SPI platform
> > data static, as it doesn't need to be exported.
> > 
> > Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
> 
> Sorry about the late reply. It seems I missed seeing this completely
> until you reminded Kevin about it.
> 
> The patch looks good to me except some minor issues. I made those
> changes myself locally since I am the one guilty of getting back on this
> so late. See below:
> 
> > ---
> >  arch/arm/mach-davinci/board-da830-evm.c    |  9 +++++++--
> >  arch/arm/mach-davinci/board-da850-evm.c    |  9 +++++++--
> >  arch/arm/mach-davinci/board-mityomapl138.c |  9 +++++++--
> >  arch/arm/mach-davinci/devices-da8xx.c      | 14 +++-----------
> >  arch/arm/mach-davinci/include/mach/da8xx.h |  3 +--
> >  5 files changed, 25 insertions(+), 19 deletions(-)
> 
> The patch doesn't apply to the latest kernel anymore. I resolved that.
> 
> > 
> > diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
> > index 11c3db9..adb8d87 100644
> > --- a/arch/arm/mach-davinci/board-da830-evm.c
> > +++ b/arch/arm/mach-davinci/board-da830-evm.c
> > @@ -652,8 +652,13 @@ static __init void da830_evm_init(void)
> >  	if (ret)
> >  		pr_warning("da830_evm_init: rtc setup failed: %d\n", ret);
> >  
> > -	ret = da8xx_register_spi(0, da830evm_spi_info,
> > -				 ARRAY_SIZE(da830evm_spi_info));
> > +	ret = spi_register_board_info(da830evm_spi_info,
> > +				      ARRAY_SIZE(da830evm_spi_info));
> > +	if (ret)
> > +		pr_warning("da830_evm_init: spi info registration failed: %d\n",
> > +			   ret);
> 
> Checkpatch asks us to use pr_warn() instead. Fixed that. Also, used
> __func__ to print function name. Rob Tivy has patches fixing these all
> through this file.
> 
> Thanks,
> Sekhar

Thank you for considering the patch and for the upstream update!

Cheers,
Vivien


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