linux-kernel - Re: [PATCH v1 3/5] ARM: imx28evk: add mmc dt support

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Message-ID: <20120314073035.GI18320@game.jcrosoft.org>
Date:	Wed, 14 Mar 2012 08:30:35 +0100
From:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To:	Rob Herring <robherring2@...il.com>
Cc:	Sascha Hauer <s.hauer@...gutronix.de>,
	Dong Aisheng <b29396@...escale.com>,
	vinod.koul@...ux.intel.com, devicetree-discuss@...ts.ozlabs.org,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	rob.herring@...xeda.com, rdunlap@...otime.net,
	kernel@...gutronix.de, cjb@...top.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1 3/5] ARM: imx28evk: add mmc dt support

On 12:45 Tue 13 Mar     , Rob Herring wrote:
> On 03/13/2012 11:52 AM, Sascha Hauer wrote:
> > On Tue, Mar 13, 2012 at 09:39:30AM -0500, Rob Herring wrote:
> >> On 03/13/2012 03:47 AM, Dong Aisheng wrote:
> >>> From: Dong Aisheng <dong.aisheng@...aro.org>
> >>>
> >>> Signed-off-by: Dong Aisheng <dong.aisheng@...aro.org>
> >>> ---
> >>>  arch/arm/boot/dts/imx28-evk.dts |   14 ++++++++++++++
> >>>  arch/arm/boot/dts/imx28.dtsi    |   33 +++++++++++++++++++++++++++++++++
> >>>  arch/arm/mach-mxs/imx28-dt.c    |    2 ++
> >>>  3 files changed, 49 insertions(+), 0 deletions(-)
> >>
> >> snip
> >>
> >>> diff --git a/arch/arm/mach-mxs/imx28-dt.c b/arch/arm/mach-mxs/imx28-dt.c
> >>> index 78d1129..429b88e 100644
> >>> --- a/arch/arm/mach-mxs/imx28-dt.c
> >>> +++ b/arch/arm/mach-mxs/imx28-dt.c
> >>> @@ -23,6 +23,8 @@ static const struct of_dev_auxdata imx28_auxdata_lookup[] __initconst = {
> >>>  	OF_DEV_AUXDATA("arm,pl011", MX28_DUART_BASE_ADDR, "duart", NULL),
> >>>  	OF_DEV_AUXDATA("fsl,imx28-fec", MX28_ENET_MAC0_BASE_ADDR, "imx28-fec.0", NULL),
> >>>  	OF_DEV_AUXDATA("fsl,imx28-fec", MX28_ENET_MAC1_BASE_ADDR, "imx28-fec.1", NULL),
> >>> +	OF_DEV_AUXDATA("fsl,imx28-mmc", MX28_SSP0_BASE_ADDR, "mxs-mmc.0", NULL),
> >>> +	OF_DEV_AUXDATA("fsl,imx28-mmc", MX28_SSP1_BASE_ADDR, "mxs-mmc.1", NULL),
> >>
> >> Why is this needed?
> > 
> > These are needed for the drivers which have still the mxs-mmc.* names
> > to find their clocks. Alternatively we could also add the appropriate
> > clocks to the clock file. Don't know if that's better though.
> 
> Ah, yes I should have known that... If clk lookup is all that's needed,
> I'd suggest adding the necessary clk lookups either here or in the clock
> code. Not much difference, but at least it removes the use of
> *_BASE_ADDR defines.
Agreed we do this on AT91

Best Regards,
J.
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