linux-kernel - Re: [PATCH 20/28] nios2: Time keeping

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Message-ID: <CAFiDJ5_ZRYMrk86+HPLR_FEc5F-Yi04=Jz_EF5L40rRfOLC-9A@mail.gmail.com>
Date:	Wed, 23 Apr 2014 11:21:49 +0800
From:	Ley Foon Tan <lftan@...era.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Linux-Arch <linux-arch@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	cltang@...esourcery.com
Subject: Re: [PATCH 20/28] nios2: Time keeping

On Tue, Apr 22, 2014 at 9:44 PM, Arnd Bergmann <arnd@...db.de> wrote:
> On Friday 18 April 2014, Ley Foon Tan wrote:
>> +static inline unsigned long read_timersnapshot(void)
>> +{
>> +       unsigned long count;
>> +
>> +       outw(0, timer_membase + ALTERA_TIMER_SNAPL_REG);
>> +       count =
>> +               inw(timer_membase + ALTERA_TIMER_SNAPH_REG) << 16 |
>> +               inw(timer_membase + ALTERA_TIMER_SNAPL_REG);
>> +
>> +       return count;
>> +}
>> +
>> +static inline void write_timerperiod(unsigned long period)
>> +{
>> +       outw(period, timer_membase + ALTERA_TIMER_PERIODL_REG);
>> +       outw(period >> 16, timer_membase + ALTERA_TIMER_PERIODH_REG);
>> +}
>
> It's wrong to use 'outw' if this device is not on an PC-style ISA bus,
> which I assume it is not. Since timer_membase is an __iomem pointer,
> I'm sure you want to use writew() instead.
>
>         Arnd
Sure, will change all outw() to writew() and inw() to readw().

Ley Foon
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