linux-kernel - Re: [PATCH 1/4] mtd: lpc32xx_slc: Select AMBA

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Message-ID: <CAAAP30Fdr2_tcgMYjCirVPCPTtrUgbeMb=7j=69wGtvJeiLsOA@mail.gmail.com>
Date:	Wed, 27 Jun 2012 16:26:18 -0300
From:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Roland Stigge <stigge@...com.de>, dedekind1@...il.com,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	dwmw2@...radead.org, kevin.wells@....com, srinivas.bakki@....com,
	linux-arm-kernel@...ts.infradead.org, hechtb@...glemail.com,
	lars@...afoo.de, b32955@...escale.com, leiwen@...vell.com
Subject: Re: [PATCH 1/4] mtd: lpc32xx_slc: Select AMBA_PL08X in Kconfig

On Wed, Jun 27, 2012 at 4:15 PM, Russell King - ARM Linux
<linux@....linux.org.uk> wrote:
> On Wed, Jun 27, 2012 at 05:51:12PM +0200, Roland Stigge wrote:
>> From: Alexandre Pereira da Silva <aletes.xgr@...il.com>
>>
>> Since this driver depends on the amba pl08x dma driver, select it in Kconfig.
>>
>> Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>
>> Signed-off-by: Roland Stigge <stigge@...com.de>
>> ---
>>  drivers/mtd/nand/Kconfig |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
>> index de69978..a9e8b73 100644
>> --- a/drivers/mtd/nand/Kconfig
>> +++ b/drivers/mtd/nand/Kconfig
>> @@ -417,6 +417,7 @@ config MTD_NAND_PXA3xx
>>  config MTD_NAND_SLC_LPC32XX
>>       tristate "NXP LPC32xx SLC Controller"
>>       depends on ARCH_LPC32XX
>> +     select AMBA_PL08X
>>       help
>>         Enables support for NXP's LPC32XX SLC (i.e. for Single Level Cell
>>         chips) NAND controller. This is the default for the PHYTEC 3250
>
> Surely not?  Drivers using DMA engine really should not depend on any
> particular DMA engine implementation.

Should the DMA code in this driver be ifdef'd like in spi-pl022.c?

Or just depend on DMA_ENGINE instead?
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