From 9923a8b45098fa4160cca113c10240973ecacf7e Mon Sep 17 00:00:00 2001 From: Przemyslaw Marczak Date: Mon, 20 Apr 2015 20:07:48 +0200 Subject: dm: regulator: add fixed voltage regulator driver This driver implements regulator operations for fixed Voltage/Current value regulators. beside the standard regulator constraints, which are put into the uclass platform data, a typical fixed regulator node provides few additional properties like: - gpio - gpio-open-drain - enable-active-high - startup-delay-us The only 'gpio' is used by this driver and is kept in structure of type 'fixed_regulator_platdata', as a device platform data (dev->platdata). The driver implements: - get_value - get_current - get_enable - set_enable The regulator calls and commands can be used for fixed-regulator devices, and the proper error will be returned for prohibited. Signed-off-by: Przemyslaw Marczak Acked-by: Simon Glass --- doc/device-tree-bindings/regulator/fixed.txt | 38 ++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 doc/device-tree-bindings/regulator/fixed.txt (limited to 'doc') diff --git a/doc/device-tree-bindings/regulator/fixed.txt b/doc/device-tree-bindings/regulator/fixed.txt new file mode 100644 index 0000000000..4ff39b8f51 --- /dev/null +++ b/doc/device-tree-bindings/regulator/fixed.txt @@ -0,0 +1,38 @@ +Fixed Voltage regulator + +Binding: +The binding is done by the property "compatible" - this is different, than for +binding by the node prefix (doc/device-tree-bindings/regulator/regulator.txt). + +Required properties: +- compatible: "regulator-fixed" +- regulator-name: this is required by the regulator uclass + +Optional properties: +- gpio: GPIO to use for enable control +- regulator constraints (binding info: regulator.txt) + +Other kernel-style properties, are currently not used. + +Note: +For the regulator constraints, driver expects that: +- regulator-min-microvolt is equal to regulator-max-microvolt +- regulator-min-microamp is equal to regulator-max-microamp + +Example: +fixed_regulator@0 { + /* Mandatory */ + compatible = "regulator-fixed"; + regulator-name = "LED_3.3V"; + + /* Optional: */ + gpio = <&gpc1 0 GPIO_ACTIVE_LOW>; + + /* Optional for regulator uclass */ + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-min-microamp = <15000>; + regulator-max-microamp = <15000>; + regulator-always-on; + regulator-boot-on; +}; -- cgit v1.2.1