summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/mfd
diff options
context:
space:
mode:
authorHans de Goede <hdegoede@redhat.com>2016-06-03 18:59:44 +0200
committerMark Brown <broonie@kernel.org>2016-06-06 18:38:30 +0100
commit636e2a39cf904946a0e062bc05445149b366ba2e (patch)
tree5de58acfbce1a367637a66541a43a4cc865384b8 /Documentation/devicetree/bindings/mfd
parenta51f9f4622a34eb19b5658c08b083345d763657b (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/devicetree/bindings/mfd')
-rw-r--r--Documentation/devicetree/bindings/mfd/axp20x.txt6
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: