linux-kernel - Re: [RFC][PATCH 03/10] arm: mxc: changes to common plat-mxc code to add support for i.MX5

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Date:	Fri, 4 Dec 2009 10:43:11 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Amit Kucheria <amit.kucheria@...onical.com>
Cc:	List Linux Kernel <linux-kernel@...r.kernel.org>,
	Dinh.Nguyen@...escale.com, s.hauer@...gutronix.de,
	grant.likely@...retlab.ca, r.herring@...escale.com,
	linux-arm-kernel@...ts.infradead.org, daniel@...aq.de,
	valentin.longchamp@...l.ch
Subject: Re: [RFC][PATCH 03/10] arm: mxc: changes to common plat-mxc code
	to add support for i.MX5

On Fri, Dec 04, 2009 at 04:47:03AM +0200, Amit Kucheria wrote:
> +#elif defined CONFIG_MXC_TZIC
> +	@ Load offset & priority of the highest priority
> +	@ interrupt pending.
> +	@ 0xD80 is HIPND0 register
> +	ldr     \irqnr, =0
> +	ldr     \irqstat, =0x0D80

Both these constants can be loaded by a 'mov' instruction.

> +1000:
> +	ldr     \tmp,   [\irqstat, \base]
> +	cmp     \tmp, #0
> +	bne     1001f
> +	addeq   \irqnr, \irqnr, #32
> +	addeq   \irqstat, \irqstat, #4
> +	cmp     \irqnr, #128
> +	blo     1000b
> +	b       2001f
> +1001:	ldr     \irqstat, =1

	mov	\irqstat, #1

> +1002:	tst     \tmp, \irqstat
> +	bne     2002f
> +	movs    \tmp, \tmp, lsr #1
> +	addne   \irqnr, \irqnr, #1
> +	bne     1002b
> +2001:
> +	ldr  \irqnr, =0

	mov	\irqnr, #0

would be better.

> diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c
> index 844567e..97fb590 100644
> --- a/arch/arm/plat-mxc/time.c
> +++ b/arch/arm/plat-mxc/time.c
> @@ -25,6 +25,7 @@
>  #include <linux/irq.h>
>  #include <linux/clockchips.h>
>  #include <linux/clk.h>
> +#include <linux/delay.h>

What is the reason for adding this include?
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