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

[Amit Kachhap]

On 21 August 2011 22:48, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> 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.
>
You are right. I will rebase it to the latest tree in the next
version. The main intention of the patch series (mostly patch 4) is to
collect information or issues on samsung platform with the new common
cpuidle framework.