[U-Boot] [PATCH 26/36] rockchip: rk1108: remove rockchip timer for sys timer

[Kever Yang]

Hi Alexander,


On 03/28/2018 12:21 AM, Alexander Kochetkov wrote:
> The question is: does rk3066 and rk3188 have arch timer? If no, than removing rk_timer
> will break u-boot for these chips.

Thanks for your comment, I will double check about if this two chips
have arch
timer, I think it should be, but I don't have boards now.

Thanks,
- Kever
>
> And my comment was about global timer, not arch timer. And I failed to enable arch
> timer for rk3188 in the kernel.
>
> Alexander.
>
>> 27 марта 2018 г., в 19:07, Alexander Kochetkov <al.kochet at gmail.com> написал(а):
>>
>>> 27 марта 2018 г., в 12:29, Kever Yang <kever.yang at rock-chips.com> написал(а):
>>>
>>> We use ARM arch timer instead.
>> Hi, Kever!
>>
>> Just let you know, that arch timer rate on rk3066 and rk3188 depends on CPU frequency.
>> I’ve made patch[1] for fixing that in kernel.
>> If u-boot do arm clock changes after timer initialization, timer can provide inaccurate delays.
>>
>> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/clocksource/rockchip_timer.c?id=5e0a39d0f727b35c8b7ef56ba0724c8ceb006297
>>
>> Alexander.
>