linux-kernel - Re: [PATCH 03/19] MIPS: sead3: Stop using GIC REG macros

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Date:	Wed, 22 Oct 2014 10:33:44 +0100
From:	Qais Yousef <qais.yousef@...tec.com>
To:	Andrew Bresticker <abrestic@...omium.org>
CC:	Ralf Baechle <ralf@...ux-mips.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Jason Cooper" <jason@...edaemon.net>,
	Paul Burton <paul.burton@...tec.com>,
	"John Crispin" <blogic@...nwrt.org>, <linux-mips@...ux-mips.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/19] MIPS: sead3: Stop using GIC REG macros

On 10/20/2014 08:03 PM, Andrew Bresticker wrote:
> Stop using the REG macros from gic.h and instead use proper iomem
> accessors.
>
> Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
> ---
>   arch/mips/mti-sead3/sead3-int.c | 7 +++----
>   1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/arch/mips/mti-sead3/sead3-int.c b/arch/mips/mti-sead3/sead3-int.c
> index 69ae185..995c401 100644
> --- a/arch/mips/mti-sead3/sead3-int.c
> +++ b/arch/mips/mti-sead3/sead3-int.c
> @@ -20,16 +20,15 @@
>   #define SEAD_CONFIG_BASE		0x1b100110
>   #define SEAD_CONFIG_SIZE		4
>   
> -static unsigned long sead3_config_reg;
> +static void __iomem *sead3_config_reg;
>   
>   void __init arch_init_irq(void)
>   {
>   	if (!cpu_has_veic)
>   		mips_cpu_irq_init();
>   
> -	sead3_config_reg = (unsigned long)ioremap_nocache(SEAD_CONFIG_BASE,
> -		SEAD_CONFIG_SIZE);
> -	gic_present = (REG32(sead3_config_reg) & SEAD_CONFIG_GIC_PRESENT_MSK) >>
> +	sead3_config_reg = ioremap_nocache(SEAD_CONFIG_BASE, SEAD_CONFIG_SIZE);
> +	gic_present = (readl(sead3_config_reg) & SEAD_CONFIG_GIC_PRESENT_MSK) >>
>   		SEAD_CONFIG_GIC_PRESENT_SHF;
>   	pr_info("GIC: %spresent\n", (gic_present) ? "" : "not ");
>   	pr_info("EIC: %s\n",

I think you need to use the __raw_readl() variant here and for all other 
similar changes.

Qais
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