Re: [Linaro-acpi] [PATCH] watchdog: introduce the ARM64 SBSA watchdog driver

[Guenter Roeck <linux@roeck-us.net>]

On 05/01/2015 04:22 PM, Timur Tabi wrote:
> Guenter Roeck wrote:
>> Not really, at least not me. However, there is no other caller of
>> arch_timer_get_rate, except for the call setting arch_timer_rate.
>> This suggests that it might not be such a good idea to call
>> arch_timer_get_rate() and arch_timer_read_counter() in the first place.
>
> I don't know of any other way to convert seconds into watchdog ticks.
>
>> [ On a side note, arch_timer_get_rate() can return 0 if ARM_ARCH_TIMER
>>    is not configured. You'll need to check for that. ]
>
> Check the Kconfig for this driver.  It requires ARM_ARCH_TIMER.
>
>> It is hard to imagine that the watchdog would be the only driver which
>> needs this clock. Isn't there some clock API call that can be used
>> instead ?
>
> If there is, I'd love to know it.  There's no 'device' for this driver, so I don't think the clk API will work.
>
Maybe ask on the arm  mailing list ?

Guenter

>> As for acpi_parse_entries, we will need some feedback from the acpi
>> maintainers. If the intent is that this function can be called from
>> drivers, it should be exported.
>
> Agreed.
>