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Diffstat (limited to 'doc/device-tree-bindings/regulator/regulator.txt')
| -rw-r--r-- | doc/device-tree-bindings/regulator/regulator.txt | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/regulator/regulator.txt b/doc/device-tree-bindings/regulator/regulator.txt new file mode 100644 index 0000000000..68b02a8e74 --- /dev/null +++ b/doc/device-tree-bindings/regulator/regulator.txt @@ -0,0 +1,54 @@ +Voltage/Current regulator + +Binding: +The regulator devices don't use the "compatible" property. The binding is done +by the prefix of regulator node's name. Usually the pmic I/O driver will provide +the array of 'struct pmic_child_info' with the prefixes and compatible drivers. +The bind is done by calling function: pmic_bind_childs(). +Example drivers: +pmic: drivers/power/pmic/max77686.c +regulator: drivers/power/regulator/max77686.c + +For the node name e.g.: "prefix[:alpha:]num { ... }": +- the driver prefix should be: "prefix" or "PREFIX" - case insensitive +- the node name's "num" is set as "dev->driver_data" on bind + +Example the prefix "ldo" will pass for: "ldo1", "ldo@1", "LDO1", "LDOREG@1"... + +Required properties: +- regulator-name: a string, required by the regulator uclass + +Note +The "regulator-name" constraint is used for setting the device's uclass +platform data '.name' field. And the regulator device name is set from +it's node name. + +Optional properties: +- regulator-min-microvolt: a minimum allowed Voltage value +- regulator-max-microvolt: a maximum allowed Voltage value +- regulator-min-microamp: a minimum allowed Current value +- regulator-max-microamp: a maximum allowed Current value +- regulator-always-on: regulator should never be disabled +- regulator-boot-on: enabled by bootloader/firmware + +Other kernel-style properties, are currently not used. + +Note: +For the regulator autoset from constraints, the framework expects that: +- regulator-min-microvolt is equal to regulator-max-microvolt +- regulator-min-microamp is equal to regulator-max-microamp +- regulator-always-on or regulator-boot-on is set + +Example: +ldo0 { + /* Mandatory */ + regulator-name = "VDDQ_EMMC_1.8V"; + + /* Optional */ + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-min-microamp = <100000>; + regulator-max-microamp = <100000>; + regulator-always-on; + regulator-boot-on; +}; |