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power: reset: ltc2952: document optional trigger behavior

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Document the fact that the trigger signal is now optional, and describe
the behavior when this is used.

While at it, fix a typo, and paraphrase a sentence to be less platform
specific.

Signed-off-by: Frans Klaver <frans.klaver@xsens.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Frans Klaver 2015-01-14 09:15:46 +01:00 committed by Sebastian Reichel
parent ee18185331
commit 0f2ecb8fa2
1 changed files with 8 additions and 5 deletions
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13
Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt
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@ -1,20 +1,23 @@
Binding for the LTC2952 PowerPath controller
This chip is used to externally trigger a system shut down. Once the trigger has
been sent, the chips' watchdog has to be reset to gracefully shut down.
If the Linux systems decides to shut down it powers off the platform via the
kill signal.
been sent, the chip's watchdog has to be reset to gracefully shut down.
A full powerdown can be triggered via the kill signal.
Required properties:
- compatible: Must contain: "lltc,ltc2952"
- trigger-gpios: phandle + gpio-specifier for the GPIO connected to the
chip's trigger line
- watchdog-gpios: phandle + gpio-specifier for the GPIO connected to the
chip's watchdog line
- kill-gpios: phandle + gpio-specifier for the GPIO connected to the
chip's kill line
Optional properties:
- trigger-gpios: phandle + gpio-specifier for the GPIO connected to the
chip's trigger line. If this property is not set, the
trigger function is ignored and the chip is kept alive
until an explicit kill signal is received
Example:
ltc2952 {