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SubjectRe: [PATCH 1/2] dt-bindings: watchdog: Add arm,smc-wdt watchdog arm,smc-wdt compatible
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Hi, Julius

On 2020/2/22 3:41, Julius Werner wrote:
>> Because the ATF does not define standard wdt index, each vendor defines
>> its own index.
>> So I don't think that the current driver[0] can fully cover my usecases.
> I think the best way to solve this would be to put the SMC function ID
> as another field into the device tree, so that multiple vendors could
> share the same driver even if their firmware interface uses a
> different SMC. But they still have to implement the same API for that
> SMC, of course, not sure if the Meson driver is suitable for that (but
> if it is then I think merging those drivers would be a good idea).
The SMC function ID may be solved by the DTS, but the wdt indexs(Eg:
SMCWD_INFO) are also different
for each vendor. The imx_sc_wdt.c is also use the SMC to operate the
WDT, but the wdt indexs(Eg: IMX_SIP_TIMER_START_WDOG)
are different from ours. IMO, If the ATF can implement a common hal
interface and index for watchdog, then writing a
common smc wdt driver will be easier to compatible with all vendors.

Best Regards
>
> .

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