Hi Boris, > Hello, > > This patch series is a porposal to enhance the sam9 watchdog timer support. > > The at91sam9 watchdog timer can only be configured once, and the current > implementation tries to configure it in a static way: > - 2 seconds timeout > - wdt restart every 500ms > > If the timer has already been configured with different values, it returns an > error and do not create any watchdog device. > > This is not critical if the watchdog is disabled, but if it has been enabled > with different timeout values it will lead to a SoC reset. > > This patch series tries to address this issue by adapting the heartbeat value > according the WDT timer config: > - it first tries to configure the timer as requested. > - if it fails it fallbacks to the current config, adapting its heartbeat timer > to the needs > > This patch series also move to a dynamically allocated at91wdt device instead > of the static instance. I'm not sure this is the best solution, so please tell > me if you prefer to keep static instance of watchdog. > > It adds a new at91 wdt type: software. This new type make use of the at91 wdt > interrupt to trigger a software reboot. > > Finally it adds several properties to the device tree bindings. > > Best Regards, > Boris > > Changes since v4: > - fix coding style issues > - remove unneeded watchdog_active test > > Changes since v3: > - fix a bug in heartbeat time computation > - fix a bug in at91_wdt_set_timeout when new timeout is bigger than the old > one > - rename at91_wdt_ping into at91_wdt_start > - remove unneeded ping callback assignment > > Changes since v2: > - fix documentation > - rework the heartbeat computation to get a more flexible behaviour > - fix xx_to_yy macros > - modify warning and error messages > - remove unneeded parenthesis in arithmetic operations > - use devm functions to map io memory > - remove unneeded devm_kfree calls > > Change since v1: > - fix typo in documentaion > - fix irq dt definition for sama5d3 SoC > > > Boris BREZILLON (4): > watchdog: at91sam9_wdt: better watchdog support > watchdog: at91sam9_wdt: update device tree doc > ARM: at91/dt: add sam9 watchdog default options to SoCs > ARM: at91/dt: add watchdog properties to kizbox board > > .../devicetree/bindings/watchdog/atmel-wdt.txt | 30 +- > arch/arm/boot/dts/at91sam9260.dtsi | 5 + > arch/arm/boot/dts/at91sam9263.dtsi | 5 + > arch/arm/boot/dts/at91sam9g45.dtsi | 5 + > arch/arm/boot/dts/at91sam9n12.dtsi | 5 + > arch/arm/boot/dts/at91sam9x5.dtsi | 5 + > arch/arm/boot/dts/kizbox.dts | 6 + > arch/arm/boot/dts/sama5d3.dtsi | 5 + > drivers/watchdog/at91sam9_wdt.c | 309 ++++++++++++++------ > 9 files changed, 287 insertions(+), 88 deletions(-) These 4 patches have been added to linux-watchdog-next. Kind regards, Wim. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
