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Diffstat (limited to 'roms/u-boot/doc/device-tree-bindings/regulator/fixed.txt')
| -rw-r--r-- | roms/u-boot/doc/device-tree-bindings/regulator/fixed.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/roms/u-boot/doc/device-tree-bindings/regulator/fixed.txt b/roms/u-boot/doc/device-tree-bindings/regulator/fixed.txt new file mode 100644 index 000000000..453d2bef4 --- /dev/null +++ b/roms/u-boot/doc/device-tree-bindings/regulator/fixed.txt @@ -0,0 +1,44 @@ +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 +- startup-delay-us: startup time in microseconds +- u-boot,off-on-delay-us: off delay time in microseconds +- regulator constraints (binding info: regulator.txt) +- enable-active-high: Polarity of GPIO is Active high. If this property + is missing, the default assumed is Active low. + + +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; + enable-active-high; +}; |