dt-bindings: mfd: axp20x: Add "xpowers,master-mode" property for AXP806 PMICs

commit b101829a029a ("mfd: axp20x: Fix AXP806 access errors on cold boot")
was intended to fix the case where a board uses an AXP806 in slave mode,
but the boot loader leaves it in master mode for lack of AXP806 support.
But now the driver breaks on boards where the PMIC is operating in master
mode. To let the device tree describe which mode of operation is needed,
this patch introduces a new property "xpowers,master-mode".

Fixes: 204ae2963e10 ("mfd: axp20x: Add bindings for AXP806 PMIC")
Signed-off-by: Rask Ingemann Lambertsen <rask@formelder.dk>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Documentation/devicetree/bindings/mfd/axp20x.txt
index 8f3ad9ab46372bd36631db5701589efb04d88e87..b41d2601c6ba026f29a0a6606026a56bd39cc192 100644 (file)
--- a/Documentation/devicetree/bindings/mfd/axp20x.txt
+++ b/Documentation/devicetree/bindings/mfd/axp20x.txt
@@ -28,6 +28,9 @@ Optional properties:
                  regulator to drive the OTG VBus, rather then as an input pin
                  which signals whether the board is driving OTG VBus or not.
 
+- x-powers,master-mode: Boolean (axp806 only). Set this when the PMIC is
+                       wired for master mode. The default is slave mode.
+
 - <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.