On Friday 22 May 2015 23:18:21 Hanjun Guo wrote: > On 2015年05月22日 23:01, Guenter Roeck wrote: > > On Fri, May 22, 2015 at 04:55:04PM +0200, Arnd Bergmann wrote: > >> On Friday 22 May 2015 22:50:30 Hanjun Guo wrote: > >>>> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig > >>>> index e5e7c55..25a0df1 100644 > >>>> --- a/drivers/watchdog/Kconfig > >>>> +++ b/drivers/watchdog/Kconfig > >>>> @@ -152,6 +152,18 @@ config ARM_SP805_WATCHDOG > >>>> ARM Primecell SP805 Watchdog timer. This will reboot your system when > >>>> the timeout is reached. > >>>> > >>>> +config ARM_SBSA_WATCHDOG > >>>> + tristate "ARM SBSA Generic Watchdog" > >>>> + depends on ARM || ARM64 || COMPILE_TEST > >>> > >>> SBSA is for ARMv8-A based (64-bit) servers, no need to depends on ARM, > >>> and why we depends on COMPILE_TEST? > >>> > >> > >> I think it's a reasonable assumption that someone will sooner or later > >> put that hardware into an ARM32 machine, or run a 32-bit kernel on > >> a chip that has it. > >> > >> While SBSA requires this watchdog device, nothing prevents SoC > >> manufacturers from using the same design in something that is not > >> a server. > > From this point of view, I agree that SBSA watchdog design may used > in other ARM SoCs in the future, but how about add it back when this > kind of hardware showing up? If it builds on ARM32, I'd rather leave the option in, it doesn't hurt. > > Tricky, though. Since teh driver uses arm specific clock functions, > > I don't think this can compile on a non-arm machine. > > Since it depends on ARM64/ARM, we can temporary release from that now We have to drop the '|| COMPILE_TEST' though as a result, or fix the driver to look up the clock in DT and call 'clk_get_rate'. That will break the ACPI case, but ACPI could use platform_data to pass the clock rate into the driver, to make it independent of low-level APIs. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
