Re: [PATCH] Support RTC on Malta

["tiejun.chen" <tiejun.chen@windriver.com>]

Ralf Baechle wrote:
> On Thu, Oct 30, 2008 at 07:15:44PM +0800, Tiejun Chen wrote:
> 
> Looks reasonable but I have a few comments:
> 
>> diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile
>> index cef2db8..26284fc 100644
>> --- a/arch/mips/mti-malta/Makefile
>> +++ b/arch/mips/mti-malta/Makefile
>> @@ -9,7 +9,7 @@ obj-y				:= malta-amon.o malta-cmdline.o \
>>  				   malta-display.o malta-init.o malta-int.o \
>>  				   malta-memory.o malta-mtd.o \
>>  				   malta-platform.o malta-reset.o \
>> -				   malta-setup.o malta-time.o
>> +				   malta-setup.o malta-time.o malta-rtc.o
> 
> Could you please fold malta-rtc.c into the existing malta-platform.c instead
> of creating a new file?
> 

Good idea and done.

>> +++ b/arch/mips/mti-malta/malta-rtc.c
>> @@ -0,0 +1,73 @@
> 
>> +	struct platform_device *pdev;
>> +	int ret;
>> +
>> +	pdev = platform_device_alloc("rtc_cmos", -1);
>> +	if (!pdev)
>> +		return -ENOMEM;
>> +
>> +	ret = platform_device_add_resources(pdev, malta_platform_rtc_resource,
>> +	                                       ARRAY_SIZE(malta_platform_rtc_resource));
>> +	if (ret)
>> +		goto err;
>> +
>> +	ret = platform_device_add(pdev);
>> +	if (ret)
>> +		goto err;
> 
> You can simplify this a bit by using a static struct platform_device like:
> 

I generated another patch to your separate email temporarily. I'll cc here after
you confirm if the file head is valid.

> static struct platform_device rtc_device = {
>         .name                   = "rtc_cmos",
>         .id                     = -1,
> 	.resource		= &malta_platform_rtc_resource,
> 	.num_resources		= ARRAY_SIZE(malta_platform_rtc_resource),
> };
> 
>> +
>> +	/* Try setting rtc as BCD mode to support
>> +	 * current alarm code if possible.
>> +	 */
>> +	if (!RTC_ALWAYS_BCD)
>> +		CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL);
> 
> RTC_ALWAYS_BCD is 0, so the if condition is always true and the if can be
> eleminated.
>

Ohh... I guess we'd better use this to track something once this macro may be
changed in the future.

Best Regards
Tiejun

> Can you fix that?
> 
>   Ralf
>