[PATCH linux dev-5.4 v2] ARM: aspeed: ast2600: Select timer

[Eddie James]

On 3/25/20 4:56 PM, Joel Stanley wrote:
> On Wed, 25 Mar 2020 at 21:26, Eddie James <eajames at linux.ibm.com> wrote:
>> The AST2600 also uses the FTTMR010.
>>
>> Signed-off-by: Eddie James <eajames at linux.ibm.com>
>> ---
>> Changes since v1:
>>   - Add back HAVE_ARM_ARCH_TIMER which is apparently necessary to boot...
> We want to use the arch timer. Aspeed recommends not having the
> fttmr010 driver loaded at all, and just using the arch timer. The
> problem with that is the kernel decides that it can't enable hrtimers
> with just the arch timer, so in the past I was working around that by
> enabling the fttmr010.
>
> Another possibility is to use the always-on property in the device tree:
>
> Documentation/devicetree/bindings/timer/arm,arch_timer.yaml
>
>    always-on:
>      type: boolean
>      description: If present, the timer is powered through an always-on power
>        domain, therefore it never loses context.
>
> Can you test adding this, but having fttmr010 disabled?


Ah, I see. Yes I will test that.

Thanks for explaining!

Eddie


>
> Cheers,
>
> Joel
>
>>   arch/arm/mach-aspeed/Kconfig | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm/mach-aspeed/Kconfig b/arch/arm/mach-aspeed/Kconfig
>> index 693cbdd..129bc19 100644
>> --- a/arch/arm/mach-aspeed/Kconfig
>> +++ b/arch/arm/mach-aspeed/Kconfig
>> @@ -39,6 +39,7 @@ config MACH_ASPEED_G6
>>          select CPU_V7
>>          select PINCTRL_ASPEED_G6
>>          select ARM_GIC
>> +       select FTTMR010_TIMER
>>          select HAVE_ARM_ARCH_TIMER
>>          select HAVE_SMP
>>          help
>> --
>> 1.8.3.1
>>