diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2016-06-03 18:59:44 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-06-06 18:38:30 +0100 |
| commit | 636e2a39cf904946a0e062bc05445149b366ba2e (patch) | |
| tree | 5de58acfbce1a367637a66541a43a4cc865384b8 /Documentation | |
| parent | a51f9f4622a34eb19b5658c08b083345d763657b (diff) | |
regulator: axp20x: Add support for the (external) drivebus regulator
The axp20x pmics have 2 power inputs, one called ACIN which is intended
for to be supplied via a powerbarrel on the board and one called VBUS
which is intended to be supplied via an otg connector.
In the VBUS case the pmic needs to know if the board is supplying power
to the otg connector, because then it should not take any power from
its VBUS pin. The axp209 pmic has a N_VBUSEN input pin via which the
board can signal to the pmic whether the board is supplying power to the
otg connector or not.
On the axp221/axp223 this pin can alternatively be used as an output
which controls an external regulator which (optionally) supplies
power to the otg connector from the board. When the pin is used as
output it is called DRIVEVBUS in the datasheet.
This commit adds support for the DRIVEVBUS pin as an extra pmic
controlled regulator. Since this is optional a new x-powers,drivebus dt
property is added. When this is present the misc-control register is
written to change the N_VBUSEN input pin to DRIVEVBUS output pin mode and
the extra drivebus regulator is registered with the regulator subsystem.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/mfd/axp20x.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Documentation/devicetree/bindings/mfd/axp20x.txt index d20b1034e967..585a95546288 100644 --- a/Documentation/devicetree/bindings/mfd/axp20x.txt +++ b/Documentation/devicetree/bindings/mfd/axp20x.txt @@ -22,6 +22,11 @@ Optional properties: AXP152/20X: range: 750-1875, Default: 1.5 MHz AXP22X/80X: range: 1800-4050, Default: 3 MHz +- x-powers,drive-vbus-en: axp221 / axp223 only boolean, set this when the + N_VBUSEN pin is used as an output pin to control an external + regulator to drive the OTG VBus, rather then as an input pin + which signals whether the board is driving OTG VBus or not. + - <input>-supply: a phandle to the regulator supply node. May be omitted if inputs are unregulated, such as using the IPSOUT output from the PMIC. @@ -79,6 +84,7 @@ ELDO3 : LDO : eldoin-supply : shared supply LDO_IO0 : LDO : ips-supply : GPIO 0 LDO_IO1 : LDO : ips-supply : GPIO 1 RTC_LDO : LDO : ips-supply : always on +DRIVEVBUS : Enable output : drivevbus-supply : external regulator AXP809 regulators, type, and corresponding input supply names: |