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7b03e9969c
The Armada 37xx watchdog driver was recently accepted for mainline kernel by watchdog subsystem maintainer, but the driver works a little different than the one in U-Boot. This patch fixes this. In the previous implementation there was a tiny period of time when the watchdog was disabled and the system was vulnerables - this was during pinging, which was done by disabling, setting, and enabling the counter. Now pinging is done without disabling the watchdog. We use 2 counters: Counter 1 is the watchdog counter - on expiry, the system is reset. Counter 0 is used to reset Counter 1 to start counting from the set timeout again. So Counter 1 is set to be reset on Counter 0 expiry event event and pinging is done by forcing an immediate expiry event on Counter 0. Signed-off-by: Marek Behún <marek.behun@nic.cz> Signed-off-by: Stefan Roese <sr@denx.de> |
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| .. | ||
| armada-37xx-wdt.c | ||
| ast_wdt.c | ||
| at91sam9_wdt.c | ||
| bcm2835_wdt.c | ||
| bcm6345_wdt.c | ||
| cdns_wdt.c | ||
| designware_wdt.c | ||
| ftwdt010_wdt.c | ||
| imx_watchdog.c | ||
| Kconfig | ||
| Makefile | ||
| mpc8xx_wdt.c | ||
| mt7621_wdt.c | ||
| mtk_wdt.c | ||
| omap_wdt.c | ||
| orion_wdt.c | ||
| s5p_wdt.c | ||
| sandbox_wdt.c | ||
| tangier_wdt.c | ||
| ulp_wdog.c | ||
| wdt-uclass.c | ||
| xilinx_tb_wdt.c | ||