linux-kernel - Re: [PATCH v2 3/6] i.MX: system.c: Replace magic numbers

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Date:	Wed, 15 Jun 2016 08:18:15 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Andrey Smirnov <andrew.smirnov@...il.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
	Sascha Hauer <kernel@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>
Subject: Re: [PATCH v2 3/6] i.MX: system.c: Replace magic numbers

Hello,

On Tue, Jun 14, 2016 at 06:29:50PM -0700, Andrey Smirnov wrote:
> diff --git a/arch/arm/include/asm/hardware/cache-l2x0.h b/arch/arm/include/asm/hardware/cache-l2x0.h
> index 3a5ec1c..e0ce59c 100644
> --- a/arch/arm/include/asm/hardware/cache-l2x0.h
> +++ b/arch/arm/include/asm/hardware/cache-l2x0.h
> @@ -121,6 +121,7 @@
>  #define L310_AUX_CTRL_STORE_LIMITATION		BIT(11)	/* R2P0+ */
>  #define L310_AUX_CTRL_EXCLUSIVE_CACHE		BIT(12)
>  #define L310_AUX_CTRL_ASSOCIATIVITY_16		BIT(16)
> +
>  #define L310_AUX_CTRL_CACHE_REPLACE_RR		BIT(25)	/* R2P0+ */
>  #define L310_AUX_CTRL_NS_LOCKDOWN		BIT(26)
>  #define L310_AUX_CTRL_NS_INT_CTRL		BIT(27)

I'd not include this hunk in this patch.

> diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
> index b153376..f0a9787 100644
> --- a/arch/arm/mach-imx/system.c
> +++ b/arch/arm/mach-imx/system.c
> @@ -109,7 +109,10 @@ void __init imx_init_l2cache(void)
>  	if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) {
>  		/* Configure the L2 PREFETCH and POWER registers */
>  		val = readl_relaxed(l2x0_base + L310_PREFETCH_CTRL);
> -		val |= 0x70800000;
> +		val |=  L310_PREFETCH_CTRL_DBL_LINEFILL |

s/  / / ?

> +		        L310_PREFETCH_CTRL_INSTR_PREFETCH |
> +			L310_PREFETCH_CTRL_DATA_PREFETCH |
> +			L310_PREFETCH_CTRL_DBL_LINEFILL_INCR;
>  		writel_relaxed(val, l2x0_base + L310_PREFETCH_CTRL);
>  	}
>  

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |