linux-kernel - Re: [PATCH] ALSA: atmel: fix building the ac97 driver for at91-multiplatform

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Date:	Fri, 19 Dec 2014 17:53:44 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Takashi Iwai <tiwai@...e.de>
CC:	alsa-devel@...a-project.org, Arnd Bergmann <arnd@...db.de>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	linux-kernel@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
	Alexander Stein <alexanders83@....de>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ALSA: atmel: fix building the ac97 driver for at91-multiplatform

Hello.

On 12/19/2014 2:13 AM, Alexandre Belloni wrote:

> From: Arnd Bergmann <arnd@...db.de>

> at91 will no longer export the mach/cpu.h and mach/hardware.h header files
> in the future, which would break building the atmel ac97c driver.

> Since the cpu_is_* check is only used to find out whether we are running
> on avr32 or arm/at91, we can hardcode that check in the ARM case.

> Unfortunately the driver is missing other work to be useful again on ARM,
> if anyone wants to actually use it, they need to add a DT binding, and
> the driver should really be converted to use the ASoC framework.

> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Link: http://www.spinics.net/lists/arm-kernel/msg382068.html
> ---
>   sound/atmel/ac97c.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)

> diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c
> index b59427d5a697..83975f8d5947 100644
> --- a/sound/atmel/ac97c.c
> +++ b/sound/atmel/ac97c.c
> @@ -34,10 +34,10 @@
>   #include <linux/platform_data/dma-dw.h>
>   #include <linux/dma/dw.h>
>
> +#ifdef CONFIG_AVR32
>   #include <mach/cpu.h>
> -
> -#ifdef CONFIG_ARCH_AT91
> -#include <mach/hardware.h>
> +#else
> +#define cpu_is_at32ap7000() (0)

    () around 0 not needed at all.

[...]

WBR, Sergei

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