On 24.01.2014 09:03, Heiko Stübner wrote:
On Thursday 23 January 2014 23:35:29 Tomasz Figa wrote:
On 23.01.2014 20:02, Heiko Stübner wrote:
Am Donnerstag, 23. Januar 2014, 19:51:34 schrieb Tomasz Figa:
On 23.01.2014 19:36, Heiko Stübner wrote:
In general, I want to try establishing some sort of general restart way,
as in the future one dt-board should hopefully be enough to cover all
s3c24xx soc variants.
If you make SAMSUNG_WDT_RESET always selected on S3C24XX then I guess
it's fine.
Note that you can make the restart field NULL in mach_desc in board
files.
As I said above, this is mainly meant for the dt-case. The legacy-board
files are more or less only secondary, and the affected boards can of
course then have a NULL restart handle :-) .
So for this the dt-board could simply use the wdt-reset, which then gets
replaced by the ccf-based reset if appropriate.
OK. By the way, are there any benefits of using this software reset over
watchdog reset? Maybe all S3C24xx could simply use watchdog reset and no
special handling of those with swrst would be needed.
According to the manuals I looked at, all S3C24XX SoCs seem to support the
watchdog reset - I'm not sure why the swrst variant was choosen for the newer
ones when they were added initially. So yes in theory all of them seem to be
able to use the watchdog reset.
But in any case the s3c2412 will need its own handling, due to the apparent
clock problem during resets (mentioned in the code and the manuals of
s3c2412/s3c2413).
OK. So WDT by default (always selected in Kconfig) and override to SWRST
in clock driver if available should work.
Best regards,
Tomasz
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
