aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorRené Moll <Rene.Moll@xsens.com>2014-08-08 13:12:22 (GMT)
committerSebastian Reichel <sre@kernel.org>2014-09-16 09:01:40 (GMT)
commita4b7aef6b066bda215566cf4af3455a6e36c381d (patch)
treee8208c04e964314926e15ba5ab2a9716983c21f5
parent6647156c00cc70c1e93161c3cf178071b3381bbb (diff)
Documentation: DT: Add LTC2952 poweroff bindings
LTC2952 is an external power control chip, which signals the OS to shut down. This patch documents the DT binding for the chip. Signed-off-by: René Moll <rene.moll@xsens.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
-rw-r--r--Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt26
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt
new file mode 100644
index 0000000..0c94c63
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt
@@ -0,0 +1,26 @@
+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.
+
+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
+
+Example:
+
+ltc2952 {
+ compatible = "lltc,ltc2952";
+
+ trigger-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+ watchdog-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
+ kill-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+};

Privacy Policy