[PATCH 1/3] clocksource: rockchip: Make the driver more readability and compatible

[Daniel Lezcano]

On 09/17/2015 11:28 AM, Caesar Wang wrote:
> Hi Daniel,
>
>
> 在 2015年09月17日 17:11, Daniel Lezcano 写道:
>>
>> Hi Caesar,
>>
>>
>> On 09/17/2015 09:51 AM, Caesar Wang wrote:
>>> Build the arm64 SoCs (e.g.: RK3368) on Rockchip platform,
>>> There are some failure with build up on timer driver for rockchip.
>>>
>>> logs:
>>> ...
>>> drivers/clocksource/rockchip_timer.c:156:13: error: 'NO_IRQ' undeclared
>>
>> I think the NO_IRQ definition is missing for ARM64.
>
> Yep, Maybe better to compatible if we don't use the 'NO_IRQ',

Hmm, after digging into drivers/of/irq.c and kernel/irq/irqdomain.c

when there is an error it returns zero. So NO_IRQ and -1 are not correct 
and on the other side zero can be a valid irq. That sounds a little bit 
fuzzy to me.

>>> /tmp/ccdAnNy5.s:47: Error: missing immediate expression at  operand 1 --
>>> `dsb`
>>> ...
>>>
>>> The problem was different semantics of dsb on btw arm32 and arm64,
>>> Here we can convert the dsb with insteading of dsb(sy).
>>
>> What happens to ARM32 then ?
>>
>
> The dsb() is ok for ARM32, the ARM32/64 are OK if we can convert the
> dsb() to dsb(sy).
> I believe all drivers with 'dsb()' have same issue on ARM64 platform.
>
>>> Meanwhile, I change a bit to make the code more readability for driver
>>> when I check the code style.
>>>
>>> Signed-off-by: Caesar Wang <wxt at rock-chips.com>
>>
>>
>
>


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