linux-kernel - Re: Multiple CCR definitions

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Message-ID: <52D93FCA.1090202@ti.com>
Date:	Fri, 17 Jan 2014 20:05:54 +0530
From:	Balaji T K <balajitk@...com>
To:	Nishanth Menon <nm@...com>
CC:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Tony Lindgren <tony@...mide.com>,
	Amarinder Bindra <a-bindra@...com>,
	Chris Ball <cjb@...top.org>,
	"uclinux-dist-devel@...ckfin.uclinux.org" 
	<uclinux-dist-devel@...ckfin.uclinux.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	linux-omap <linux-omap@...r.kernel.org>
Subject: Re: Multiple CCR definitions

On Friday 17 January 2014 12:09 AM, Nishanth Menon wrote:
> +linux-omap as well.
>
> On Thu, Jan 16, 2014 at 7:07 AM, Geert Uytterhoeven
> <geert@...ux-m68k.org> wrote:
>> On Tue, Sep 10, 2013 at 11:05 PM, Linux Kernel Mailing List
>> <linux-kernel@...r.kernel.org> wrote:
>>>      mmc: omap_hsmmc: use the generic config for omap2plus devices
>>>
>>>      OMAP's hs_mmc driver is used for MMC controller operation on many
>>>      omap2plus SoCs (OMAP2430, OMAP3, 4, 5 and AM335x).
>>>
>>>      Considering that the device tree entries are already present for these,
>>>      allow the driver to be built using the config ARCH_OMAP2PLUS rather
>>>      than individually adding a config for each SoC to enable the
>>>      support.
>>>
>>>      Use COMPILE_TEST to enable the build for other platforms.
>>>
>>>      Signed-off-by: Amarinder Bindra <a-bindra@...com>
>>>      Cc: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
>>>      Cc: Nishanth Menon <nm@...com>
>>>      Acked-by: Felipe Balbi <balbi@...com>
>>>      Acked-by: Balaji T K <balajitk@...com>
>>>      Signed-off-by: Chris Ball <cjb@...top.org>
>>> ---
>>>   drivers/mmc/host/Kconfig |    6 +++---
>>>   1 files changed, 3 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
>>> index 84102bc..b8ce939 100644
>>> --- a/drivers/mmc/host/Kconfig
>>> +++ b/drivers/mmc/host/Kconfig
>>> @@ -284,11 +284,11 @@ config MMC_OMAP
>>>
>>>   config MMC_OMAP_HS
>>>          tristate "TI OMAP High Speed Multimedia Card Interface support"
>>> -       depends on SOC_OMAP2430 || ARCH_OMAP3 || ARCH_OMAP4
>>> +       depends on ARCH_OMAP2PLUS || COMPILE_TEST
>>
>> sh-allmodconfig (http://kisskb.ellerman.id.au/kisskb/buildresult/10477672/):
>> include/linux/omap-dma.h:171:8: error: expected identifier before
>> numeric constant
>> make[4]: *** [drivers/mmc/host/omap_hsmmc.o] Error 1
>>
>> It fails because sh #defines "CCR", which is one of the enum values in
>> include/linux/omap-dma.h.
>>
>> I expect a similar failure on blackfin, which also has #define CCR.
>>
>> Possible solutions:
>>    1. Rename CCR in sh/bfin to e.g. SH_CCR resp. BF_CCR.
>>    2. Use "depends on ARCH_OMAP2PLUS || (COMPILE_TEST && ARM)

omap-dma.h will be needed until all OMAPs are converted to DT only boot.
So depends on ARCH_OMAP2PLUS || (COMPILE_TEST && ARM) looks good to me

>>    3. Stop using include/linux/omap-dma.h, as it says:
>>
>>       *  Legacy OMAP DMA handling defines and functions
>>       *
>>       *  NOTE: Do not use these any longer.
>>       *
>>       *  Use the generic dmaengine functions as defined in
>>       *  include/linux/dmaengine.h.
>>

>> Gr{oetje,eeting}s,
>>
>>                          Geert
>>
>> --
>> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>>
>> In personal conversations with technical people, I call myself a hacker. But
>> when I'm talking to journalists I just say "programmer" or something like that.
>>                                  -- Linus Torvalds
> --
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