> -----Original Message----- > From: linux-arm-kernel [mailto:linux-arm-kernel-bounces@xxxxxxxxxxxxxxxxxxx] > On Behalf Of Boris BREZILLON > Sent: 2013年6月11日 18:51 > To: Wim Van Sebroeck; Jean-Christophe Plagniol-Villard; Ferre, Nicolas; > linux-watchdog@xxxxxxxxxxxxxxx > Cc: devicetree-discuss@xxxxxxxxxxxxxxxx; linux-doc@xxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; Boris > BREZILLON > Subject: [RFC PATCH 0/4] watchdog: at91sam9_wdt: handle already configured > wdt > > Hello, > > This patch series is a porposal to enhance the sam9 watchdog timer support. > > The at91sam9 watchdog timer cannot configured twice, and the current > implementation only tries to configure 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 watchdog. > > Finally it adds several properties to the device tree bindings. > > Best Regards, > Boris > > 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 | 319 > +++++++++++++++----- > 9 files changed, 300 insertions(+), 85 deletions(-) > > -- > 1.7.9.5 > > Tested on sama5d34ek, at91sam9g25ek, linux-next_20130620 Tested by Wenyou Yang <Wenyou.yang@xxxxxxxxx> > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ?韬{.n?????%??檩??w?{.n???{饼???骅w* jg????????G??⒏ ⒎?:+v???????? ????＂??????
