kernel/linux.git/drivers/clocksource/timer-tegra186.c, branch v6.1.186

clocksource/drivers/timer-tegra186: Fix support for multiple watchdog instances

2026-07-24T13:54:24+00:00

commit ca57bf46e7a94f8c53d05c376df9fcfdcb482100 upstream. Tegra SoCs support multiple watchdogs; currently only one (WDT0) is used. When multiple watchdogs are registered, tegra186_wdt_enable() overwrites the TKEIE(x) register, discarding any existing watchdog interrupt enable bits. As a result, enabling one watchdog inadvertently disables interrupts for the others. Fix this by preserving the existing TKEIE(x) value and updating it using a read-modify-write sequence. Fixes: 42cee19a9f83 ("clocksource: Add Tegra186 timers support") Cc: stable@vger.kernel.org Signed-off-by: Kartik Rajput Signed-off-by: Daniel Lezcano Reviewed-by: Jon Hunter Link: https://patch.msgid.link/20260507154557.2082697-2-kkartik@nvidia.com Signed-off-by: Greg Kroah-Hartman

clocksource/drivers/timer-tegra186: Add support for Tegra234 SoC

2022-07-15T22:38:50+00:00

The timer IP block present on Tegra234 SoC supports watchdog timer functionality that can be used to recover from system hangs. The watchdog timer uses a timer in the background for countdown. Signed-off-by: Kartik Acked-by: Thierry Reding Link: https://lore.kernel.org/r/1656922422-25823-4-git-send-email-kkartik@nvidia.com Signed-off-by: Daniel Lezcano

clocksource: Add Tegra186 timers support

2022-07-15T22:38:50+00:00

Currently this only supports a single watchdog, which uses a timer in the background for countdown. Eventually the timers could be used for various time-keeping tasks, but by default the architected timer will already provide that functionality. Signed-off-by: Thierry Reding Signed-off-by: Kartik Acked-by: Thierry Reding Link: https://lore.kernel.org/r/1656922422-25823-3-git-send-email-kkartik@nvidia.com Signed-off-by: Daniel Lezcano