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Current in-tree users of ISL12057 RTC chip (NETGEAR ReadyNAS 102, 104 and 2120) do not have the IRQ#2 pin of the chip (associated w/ the Alarm1 mechanism) connected to their SoC, but to a PMIC (TPS65251 FWIW). This specific hardware configuration allows the NAS to wake up when the alarms rings. Recently introduced alarm support for ISL12057 relies on the provision of an "interrupts" property in system .dts file, which previous three users will never get. For that reason, alarm support on those devices is not function. To support this use case, this patch adds a new DT property for ISL12057 (isil,irq2-can-wakeup-machine) to indicate that the chip is capable of waking up the device using its IRQ#2 pin (even though it does not have its IRQ#2 pin connected directly to the SoC). This specific configuration was tested on a ReadyNAS 102 by setting an alarm, powering off the device and see it reboot as expected when the alarm rang w/: # echo `date '+%s' -d '+ 1 minutes'` > /sys/class/rtc/rtc0/wakealarm # shutdown -h now As a side note, the ISL12057 remains in the list of trivial devices, because the property is not per se required by the device to work but can help handle system w/ specific requirements. In exchange, the new feature is described in details in a specific documentation file. Signed-off-by: Arnaud Ebalard <arno@natisbad.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Peter Huewe <peter.huewe@infineon.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Thierry Reding <treding@nvidia.com> Cc: Mark Brown <broonie@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Darshana Padmadas <darshanapadmadas@gmail.com> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Landley <rob@landley.net> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Cc: Kumar Gala <galak@codeaurora.org> Cc: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| .. | ||
| atmel,at91rm9200-rtc.txt | ||
| atmel,at91sam9-rtc.txt | ||
| dallas,ds1339.txt | ||
| dw-apb.txt | ||
| haoyu,hym8563.txt | ||
| imxdi-rtc.txt | ||
| isil,isl12057.txt | ||
| lpc32xx-rtc.txt | ||
| maxim,ds1742.txt | ||
| moxa,moxart-rtc.txt | ||
| nvidia,tegra20-rtc.txt | ||
| nxp,rtc-2123.txt | ||
| olpc-xo1-rtc.txt | ||
| orion-rtc.txt | ||
| pxa-rtc.txt | ||
| rtc-cmos.txt | ||
| rtc-omap.txt | ||
| rtc-opal.txt | ||
| rtc-palmas.txt | ||
| s3c-rtc.txt | ||
| sa1100-rtc.txt | ||
| snvs-rtc.txt | ||
| spear-rtc.txt | ||
| stmp3xxx-rtc.txt | ||
| sun6i-rtc.txt | ||
| sunxi-rtc.txt | ||
| twl-rtc.txt | ||
| via,vt8500-rtc.txt | ||
| xgene-rtc.txt | ||