linux-kernel - Re: [PATCH] mtd: spi-nor: don't build Cadence QuadSPI on non-ARM

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Date:	Wed, 20 Jul 2016 03:50:27 +0200
From:	Marek Vasut <marex@...x.de>
To:	Brian Norris <computersforpeace@...il.com>,
	Stefan Roese <sr@...x.de>
Cc:	kbuild test robot <fengguang.wu@...el.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
	kbuild-all@...org, Graham Moore <grmoore@...nsource.altera.com>
Subject: Re: [PATCH] mtd: spi-nor: don't build Cadence QuadSPI on non-ARM

On 07/19/2016 10:05 PM, Brian Norris wrote:
> On Tue, Jul 19, 2016 at 08:03:00AM +0200, Stefan Roese wrote:
>> On 18.07.2016 22:20, Brian Norris wrote:
>>> Hmm, does x86 not define readsl()/writesl()? I can never tell what
>>> accessors are supposed to be "standard" across architectures.
>>>
>>> Either we need to drop the COMPILE_TEST or maybe make it (!X86 &&
>>> COMPILE_TEST).
>>
>> iowrite32_rep() etc should work for x86 as well.
> 
> Looks like it might. I'm not sure the original submitter can retest
> right now (travel), so I'd probably rather just take the easy fix for
> now, and we can widen to COMPILE_TEST later if desired.

Isn't there a generic readsl() and writesl() implementation in
include/asm-generic/io.h ?

> If I could get an ack on something like this, I'll apply it soon:

This is fine, I am making a note to revisit this.

> ---8<---
> From: Brian Norris <computersforpeace@...il.com>
> Date: Tue, 19 Jul 2016 13:02:40 -0700
> Subject: [PATCH] mtd: spi-nor: don't build Cadence QuadSPI on non-ARM
> 
> This controller driver is used only on ARM but is mostly written
> portably so it can build on other arch'es. Unfortunately, at least x86
> doesn't provibe readsl()/writesl() accessors. We could possibly fix this
> issue in the future by using io{read,write}32_rep() instead, but let's
> just drop the architectures we aren't using for now.
> 
> Signed-off-by: Brian Norris <computersforpeace@...il.com>
> ---
>  drivers/mtd/spi-nor/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
> index 1e6f037923d9..4a682ee0f632 100644
> --- a/drivers/mtd/spi-nor/Kconfig
> +++ b/drivers/mtd/spi-nor/Kconfig
> @@ -40,7 +40,7 @@ config SPI_ATMEL_QUADSPI
>  
>  config SPI_CADENCE_QUADSPI
>  	tristate "Cadence Quad SPI controller"
> -	depends on OF && (ARM || COMPILE_TEST)
> +	depends on OF && ARM
>  	help
>  	  Enable support for the Cadence Quad SPI Flash controller.
>  
> 


-- 
Best regards,
Marek Vasut