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authorLee Jones <lee.jones@linaro.org>2012-10-15 17:16:59 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-10-17 17:27:55 +0400
commit006694d099e86e5a928fb39bdea280ab42c9d59c (patch)
tree3da0d1768e3157e1ff43400a70a9c299a07aa1cc /Documentation/devicetree/bindings/regulator
parentddffeb8c4d0331609ef2581d84de4d763607bd37 (diff)
downloadlinux-006694d099e86e5a928fb39bdea280ab42c9d59c.tar.xz
regulator: gpio-regulator: Allow use of GPIO controlled regulators though DT
Here we provide the GPIO Regulator driver with Device Tree capability, so that when a platform is booting with DT instead of platform data we can still make full use of it. Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'Documentation/devicetree/bindings/regulator')
-rw-r--r--Documentation/devicetree/bindings/regulator/gpio-regulator.txt36
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/regulator/gpio-regulator.txt b/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
new file mode 100644
index 000000000000..3703be2ab821
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
@@ -0,0 +1,36 @@
+GPIO controlled regulators
+
+Required properties:
+- compatible : Must be "regulator-gpio".
+
+Optional properties:
+- gpio-enable : GPIO to use to enable/disable the regulator.
+- gpios : GPIO group used to control voltage.
+- states : Selection of available voltages and GPIO configs.
+- startup-delay-us : Startup time in microseconds.
+- enable-active-high : Polarity of GPIO is active high (default is low).
+
+Any property defined as part of the core regulator binding defined in
+regulator.txt can also be used.
+
+Example:
+
+ mmciv: gpio-regulator {
+ compatible = "regulator-gpio";
+
+ regulator-name = "mmci-gpio-supply";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <2600000>;
+ regulator-boot-on;
+
+ gpio-enable = <&gpio0 23 0x4>;
+ gpios = <&gpio0 24 0x4
+ &gpio0 25 0x4>;
+ states = <1800000 0x3
+ 2200000 0x2
+ 2600000 0x1
+ 2900000 0x0>;
+
+ startup-delay-us = <100000>;
+ enable-active-high;
+ };