> 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. The MediaTek driver is still in flux (e.g. still being reviewed in Trusted Firmware here: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405), we can still change it. So if we can now decide on making this a "standard" driver, we can change the MediaTek interface to match IMX and standardize on that. (There are existing Chromebooks shipped with a different interface, but we could handle those separately with downstream patches. I think having a unified interface that will prevent this problem in the future would be worth some extra complication right now.)
