linux-kernel - Re: [PATCH v2 7/9] clocksource: sp804: add support for Hisilicon sp804 timer

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Message-ID: <9fc18476-48a7-27d4-c1c7-cd6566696f3a@huawei.com>
Date:   Fri, 18 Sep 2020 17:34:18 +0800
From:   "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel <linux-kernel@...r.kernel.org>
CC:     Libin <huawei.libin@...wei.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Jianguo Chen <chenjianguo3@...wei.com>
Subject: Re: [PATCH v2 7/9] clocksource: sp804: add support for Hisilicon
 sp804 timer



On 2020/9/18 16:53, Daniel Lezcano wrote:
> On 12/09/2020 13:45, Zhen Lei wrote:
>> The ARM SP804 supports a maximum of 32-bit counter, but Hisilicon extends
>> it to 64-bit. That means, the registers: TimerXload, TimerXValue and
>> TimerXBGLoad are 64bits, all other registers are the same as those in the
>> SP804. The driver code can be completely reused except that the register
>> offset is different.
>>
>> Use compatible = "hisilicon,sp804" mark as Hisilicon sp804 timer.
>>
>> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
>> ---
>>  drivers/clocksource/timer-sp.h    | 12 ++++++++++++
>>  drivers/clocksource/timer-sp804.c | 15 +++++++++++++++
>>  2 files changed, 27 insertions(+)
>>
>> diff --git a/drivers/clocksource/timer-sp.h b/drivers/clocksource/timer-sp.h
>> index 1ab75cbed0e0..6ca8d82e8544 100644
>> --- a/drivers/clocksource/timer-sp.h
>> +++ b/drivers/clocksource/timer-sp.h
>> @@ -31,6 +31,18 @@
>>  #define TIMER_MIS	0x14			/*  CVR ro */
>>  #define TIMER_BGLOAD	0x18			/*  CVR rw */
>>  
>> +
>> +#define HISI_TIMER_1_BASE	0x00
>> +#define HISI_TIMER_2_BASE	0x40
>> +#define HISI_TIMER_LOAD		0x00
>> +#define HISI_TIMER_VALUE	0x08
>> +#define HISI_TIMER_CTRL		0x10
>> +#define HISI_TIMER_INTCLR	0x14
>> +#define HISI_TIMER_RIS		0x18
>> +#define HISI_TIMER_MIS		0x1c
>> +#define HISI_TIMER_BGLOAD	0x20
> 
> Why not put them in timer-sp804.c directly ?

I just want to put them together with TIMER_xxx, but ignore that HISI_TIMER_xxx
is used only in file timer-sp804.c

OK, I will move them into timer-sp804.c

> 
> [ ... ]
>