linux-kernel - Re: [PATCH] mmc: dw_mmc: add support for ARM64

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Date:	Tue, 9 Sep 2014 17:01:26 +0530
From:	Alim Akhtar <alim.akhtar@...il.com>
To:	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	Alim Akhtar <alim.akhtar@...sung.com>,
	Chris Ball <chris@...ntf.net>,
	"tgih.jun@...sung.com" <tgih.jun@...sung.com>,
	Jaehoon Chung <jh80.chung@...sung.com>,
	Arnd Bergmann <arnd@...db.de>,
	Andrew Bresticker <abrestic@...omium.org>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Yuvaraj Kumar C D <yuvaraj.cd@...sung.com>
Subject: Re: [PATCH] mmc: dw_mmc: add support for ARM64

Hi Ulf,

On Tue, Sep 9, 2014 at 12:21 PM, Ulf Hansson <ulf.hansson@...aro.org> wrote:
> On 29 August 2014 12:24, Alim Akhtar <alim.akhtar@...sung.com> wrote:
>> There are upcoming ARM64 SoCs with dw_mmc host controller.
>>
>> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
>> ---
>>  drivers/mmc/host/Kconfig |    2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
>> index a43295c..72dd6c2 100644
>> --- a/drivers/mmc/host/Kconfig
>> +++ b/drivers/mmc/host/Kconfig
>> @@ -580,7 +580,7 @@ config SDH_BFIN_MISSING_CMD_PULLUP_WORKAROUND
>>  config MMC_DW
>>         tristate "Synopsys DesignWare Memory Card Interface"
>>         depends on HAS_DMA
>> -       depends on ARC || ARM || MIPS || COMPILE_TEST
>> +       depends on ARC || ARM || ARM64 || MIPS || COMPILE_TEST
>
> Before enabling this, wouldn't it be better to add the needed support
> in dw_mmc first? Or there are no changes needed?
>
> There are also ongoing development and discussions for exynos7, which
> I guess relates to this?
> http://www.spinics.net/lists/linux-mmc/msg28294.html
Thanks for looking into this.

Yes, this patch is being tested on exynos7 platform which is ongoing
development.
The above link is one of them.
I feel this patch is too generic in nature and we now known at least
exynos7 is going to use this.
I don't know if there are any other ARM64 platform with dw_mmc controller.

So, I am going to leave this upto you to decide when to take this
patch, incase you decided to take it after exynos7 support lands, I
will send a reminder for this.
>
> Kind regards
> Uffe
> --
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-- 
Regards,
Alim
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