вт, 9 вер. 2025 р. о 18:39 Tom Rini <tr...@konsulko.com> пише: > > On Tue, Sep 09, 2025 at 02:26:19PM +0300, Svyatoslav Ryhel wrote: > > вт, 9 вер. 2025 р. о 13:15 Łukasz Majewski <lu...@nabladev.com> пише: > > > > > > Hi Svyatoslav, > > > > > > > пн, 8 вер. 2025 р. о 15:41 Łukasz Majewski <lu...@nabladev.com> пише: > > > > > > > > > > Hi Svyatoslav, > > > > > > > > > > > вт, 26 серп. 2025 р. о 12:39 Lukasz Majewski <lu...@nabladev.com> > > > > > > пише: > > > > > > > > > > > > > > The Tegra30 SoC is a bit special, as it doesn't have the > > > > > > > separate IP block to provide watchdog functionality. > > > > > > > > > > > > > > Instead, timer IP block allows such functionality when properly > > > > > > > configured. > > > > > > > > > > > > > > As in the tegra30.dtsi there is a timer node, which "covers" all > > > > > > > timers, with 'nvidia,tegra30-timer' compatibility it was > > > > > > > necessary to manually bind U-Boot's WDT driver (based on > > > > > > > WDT_UCLASS). > > > > > > > > > > > > > > Signed-off-by: Lukasz Majewski <lu...@nabladev.com> > > > > > > > --- > > > > > > > drivers/timer/tegra-timer.c | 18 ++++++++++++++++++ > > > > > > > 1 file changed, 18 insertions(+) > > > > > > > > > > > > > > > > > > > What is the practical application for this diver in therms of > > > > > > Tegra and U-Boot overall? > > > > > > > > > > You have the WDT functionality working. It uses the same DTS > > > > > bindings as ones used in Linux. > > > > > > > > Why do we need WDT for Tegra in U-Boot at all? > > > > > > Can you correct me if I draw wrong conclusion - you ask why Tegra needs > > > to support watchdog in u-boot bootloader ? > > > > > > > It is not used and has > > > > no practical application. > > > > > > > > > > Yes, it has ... > > > > > > Customer has number of Tegra30 colibri modules in the field. They want > > > to switch to u-boot + linux kernel BSP. > > > > > > For their application - it would be welcome if the device could reboot > > > and start emergency procedure in the case of not being able to start > > > Linux. > > > > > > The procedure is that we start Watchdog at very early boot - then we do > > > have for example 30 seconds to "feed" the Watchdog in Linux > > > > > > When we fail, after watchdog reboot, we can switch to another rootfs > > > partition (the A/B scheme of booting) or start emergency system. > > > > > > > So when are you going to submit this board variant? If driver has no > > users, it is removed. > > I assume it would be enabled on colibri_t30_defconfig. >
T30 colibri does not need it and does not use it with current configuration, hence I am asking about board submission. > -- > Tom
