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author | Przemyslaw Marczak <p.marczak@samsung.com> | 2015-04-20 18:07:48 (GMT) |
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committer | Simon Glass <sjg@chromium.org> | 2015-05-15 00:49:38 (GMT) |
commit | 9923a8b45098fa4160cca113c10240973ecacf7e (patch) | |
tree | 816720a490d9b6a07af4f277c33b1a1d5889e168 /doc | |
parent | 1757df4693fcde9fb4d4de02a22cc74d6f5caec1 (diff) | |
download | u-boot-fsl-qoriq-9923a8b45098fa4160cca113c10240973ecacf7e.tar.xz |
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 <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/device-tree-bindings/regulator/fixed.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/regulator/fixed.txt b/doc/device-tree-bindings/regulator/fixed.txt new file mode 100644 index 0000000..4ff39b8 --- /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; +}; |