On Sat, May 14, 2016 at 07:55:45PM +0200, Hans de Goede wrote: > 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 DRIVEBUS in the datasheet. > > This commit adds support for the DRIVEBUS 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 DRIVEBUS output pin mode and > the extra drivebus regulator is registered with the regulator subsystem. > > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > --- > Documentation/devicetree/bindings/mfd/axp20x.txt | 5 ++++ > drivers/regulator/axp20x-regulator.c | 30 ++++++++++++++++++++++++ > 2 files changed, 35 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Documentation/devicetree/bindings/mfd/axp20x.txt > index d20b103..7a88479 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,drivebus: axp221 / axp223 only boolean, set this when the N_VBUSEN x-powers,drive-vbus-en > + 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. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
