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

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Message-ID: <55FA87AA.4040807@gmail.com>
Date:	Thu, 17 Sep 2015 17:28:10 +0800
From:	Caesar Wang <caesar.upstream@...il.com>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
CC:	Caesar Wang <wxt@...k-chips.com>,
	linux-rockchip@...ts.infradead.org,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] clocksource: rockchip: Make the driver more readability
 and compatible

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',

>
>> /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@...k-chips.com>
>
>


-- 
Thanks,
Caesar

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