[RFC PATCH 3/4] ARM: EXYNOS4: Add support AFTR mode cpuidle state on EXYNOS4210

[Russell King - ARM Linux]

On Fri, Aug 19, 2011 at 06:39:59PM +0530, Amit Daniel Kachhap wrote:
> +ENTRY(exynos4_enter_lp)
> +	stmfd	sp!, { r3 - r12, lr }
> +
> +	adr	r0, sleep_save_misc
> +
> +	mrc	p15, 0, r2, c15, c0, 0	@ read power control register
> +	str	r2, [r0], #4
> +
> +	mrc	p15, 0, r2, c15, c0, 1	@ read diagnostic register
> +	str	r2, [r0], #4
> +
> +	ldr	r3, =resume_with_mmu
> +	bl	cpu_suspend
> +
> +	mov	r0, sp
> +	bl	exynos4_cpu_lp
> +
> +	/* Restore original sp */
> +	mov	r0, sp
> +	add	r0, r0, #4
> +	ldr	sp, [r0]
> +
> +	mov	r0, #0
> +	b	early_wakeup

This is based upon old kernel code.  Clearly hasn't been tested with
anything later than 3.0.