From 8f446e6fa1d506be2cb80f91c214f1705327c7f9 Mon Sep 17 00:00:00 2001 From: Rajendra Nayak Date: Fri, 18 Nov 2011 16:47:17 +0530 Subject: regulator: helper routine to extract regulator_init_data The helper routine is meant to be used by the regulator drivers to extract the regulator_init_data structure from the data that is passed from device tree. 'consumer_supplies' which is part of regulator_init_data is not extracted as the regulator consumer mappings are passed through DT differently, implemented in subsequent patches. Similarly the regulator<-->parent/supply mapping is handled in subsequent patches. Also add documentation for regulator bindings to be used to pass regulator_init_data struct information from device tree. Some of the regulator properties which are linux and board specific, are left out since its not clear if they can be in someway embedded into the kernel or passed in from DT. They will be revisited later. Signed-off-by: Rajendra Nayak Signed-off-by: Mark Brown --- .../devicetree/bindings/regulator/regulator.txt | 54 ++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/regulator.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/regulator/regulator.txt b/Documentation/devicetree/bindings/regulator/regulator.txt new file mode 100644 index 000000000000..82bef20d4c49 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/regulator.txt @@ -0,0 +1,54 @@ +Voltage/Current Regulators + +Optional properties: +- regulator-name: A string used as a descriptive name for regulator outputs +- regulator-min-microvolt: smallest voltage consumers may set +- regulator-max-microvolt: largest voltage consumers may set +- regulator-microvolt-offset: Offset applied to voltages to compensate for voltage drops +- regulator-min-microamp: smallest current consumers may set +- regulator-max-microamp: largest current consumers may set +- regulator-always-on: boolean, regulator should never be disabled +- regulator-boot-on: bootloader/firmware enabled regulator +- -supply: phandle to the parent supply/regulator node + +Example: + + xyzreg: regulator@0 { + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <2500000>; + regulator-always-on; + vin-supply = <&vin>; + }; + +Regulator Consumers: +Consumer nodes can reference one or more of its supplies/ +regulators using the below bindings. + +- -supply: phandle to the regulator node + +These are the same bindings that a regulator in the above +example used to reference its own supply, in which case +its just seen as a special case of a regulator being a +consumer itself. + +Example of a consumer device node (mmc) referencing two +regulators (twl-reg1 and twl-reg2), + + twl-reg1: regulator@0 { + ... + ... + ... + }; + + twl-reg2: regulator@1 { + ... + ... + ... + }; + + mmc: mmc@0x0 { + ... + ... + vmmc-supply = <&twl-reg1>; + vmmcaux-supply = <&twl-reg2>; + }; -- cgit v1.2.3